CN101207960A

CN101207960A - Drive unit of gas discharge lamp

Info

Publication number: CN101207960A
Application number: CNA2006101675391A
Authority: CN
Inventors: 叶建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-24
Filing date: 2006-12-24
Publication date: 2008-06-25

Abstract

The invention discloses a plan for a driver (a ballast) of a gas discharge lamp, which is a device that is arranged on a single resonant circuit. The device utilizes a clockwise method and a flyback method simultaneously, also utilizes a resonant circuit to generate a high frequency alternating current power source for driving the gas discharge lamp, and comprises a transformer, a switch tube, a resonant capacitance, a pulse control circuit and an abnormity control circuit; wherein, the transfomer generates high frequency alternating current under the action of the switch tube, and makes the circuits generate resonance under the action of the resonant capacitance for outputting high frequency quasi sine wave. When controlled by the pulse control circuit, the transformer also outputs basically constant high frequency power within the range of wide voltage inputting. When alternating current is inputted, the device also comprises a rectifying circuit, a filtering circuit, a power factor correction circuit, etc.

Description

A kind of drive unit of gaseous discharge lamp

Technical field

The present invention relates to a kind of circuit structure of drive unit of gaseous discharge lamp, relate in particular to circuit structure transformer in the air discharge lamp driving mechanism.

Background technology

In the Driving technique of gaseous discharge lamp,, adopt high frequency switch mode usually in order to raise the efficiency (being power saving) and reduced volume.Circuit commonly used has: half-bridge circuit, full-bridge circuit and push-pull circuit etc.; The INVERTER backlight as LCD (inverter) adopts low-voltage full-bridge inverter circuit or push-pull inverter circuit (needing the secondary power supply conversion); The high-frequency electronic ballast of electricity-saving lamp and fluorescent lamp substantially all adopts half-bridge circuit;

The discreteness of the electric ballast frequency of oscillation of sampling half-bridge (self-excitation) formula circuit is very big, and the quality of bulk article is difficult to control; The output voltage of half-bridge circuit is very low, adopt the output voltage of half-bridge circuit when supply power voltage is low to moderate 150V of PPFC (correction of Passive Power factor) that 75V is only arranged, and the needed operating voltage of the above fluorescent lamp of 10W all is higher than this value (for example the normal working voltage of T5-28W fluorescent tube is 170V); Output voltage at electric ballast is lower than under the lamp works voltage condition, in order normally to light fluorescent lamp, must rely on current-limiting inductance and start the series resonance that produces between the electric capacity, improves and satisfy the operating voltage of fluorescent tube; And the foundation of series resonance must guarantee under the constant situation of particular job frequency, and the induction reactance of current-limiting inductance equates with the capacitive reactance that starts electric capacity; In a single day current-limiting inductance determines it is unalterable with the value that starts electric capacity in electric ballast, therefore, guarantees the accuracy and the stability of electric ballast operating frequency, is the key issue that guarantees the electric ballast work quality; The error of all components and parts in the half-bridge circuit also comprises the variation of external factors such as supply power voltage, ambient operating temperature, all is directly connected to the stability of switching circuit operating frequency; The product quality discreteness is very big to show that mainly a. can be with a lot of years with what have in a collection of product, and have can only be with several days; B. same ballast operational data after changing fluorescent tube can change thereupon; Even c. use same fluorescent tube, along with wearing out of components and parts and fluorescent tube, operational data still can constantly change; D, same ballast uses same fluorescent tube, on the same day, because the early, middle and late temperature difference and change in voltage also can make operational data be very different; Strict in any case control all can not guarantee the consistency of batch process and the stability in the use.

At the electric ballast that adopts half bridge circuit, also have two kinds of frequencies of oscillation in the circuit working: a kind of is the frequency of oscillation (abbreviation operating frequency) of switching circuit; Another kind is the resonance frequency (abbreviation resonance frequency) between current-limiting inductance and the startup electric capacity; Because resonant circuit is the load of switching circuit, therefore, has following three kinds of matching relationships between operating frequency and the resonance frequency:

The 1st kind: operating frequency is during greater than resonance frequency, and the load of switching circuit is perception:

The 2nd kind: when operating frequency equaled resonance frequency, the load of switching circuit was resistive:

The 3rd kind: operating frequency is during less than resonance frequency, and the load of switching circuit is capacitive:

Harm is fatal to capacitive load for the electric ballast switching circuit.Figure 13 a is the gate driving waveform of the load of switching circuit field effect transistor when being capacitive, at the rising edge of waveform a tangible sawtooth waveforms is arranged; Figure 13 b and Figure 13 c are the base drive waveforms of the load of switching circuit bipolarity triode when being capacitive, and a tangible sawtooth waveforms is arranged on the ascending curve of Figure 13 b waveform; Figure 13 c waveform has then produced very serious waveform fracture, has been equivalent to switch twice.These waveforms illustrate that all the electric ballast switching circuit is to be operated in the hard switching state, and the switching tube power consumption of this moment strengthens, the temperature rise aggravation, and the stress variation is very easy to damage.

We know, the voltage of fluorescent tube when startup and operate as normal, current difference is very big, this species diversity causes the startup frequency of half-bridge (auto-excitation type) electric ballast and inconsistent (the startup frequency height of operating frequency, operating frequency is low), this just a fatal problem occurred: in order to guarantee can to obtain enough startup high pressure when fluorescent tube starts, resonance frequency must with start that frequency equate or error is very little, but operating frequency reduces after operate as normal, make operating frequency less than resonance frequency, the load of switching circuit is capacitive, switching tube is operated in the hard switching state, and the stress that bears is very big, is very easy to damage.This is the critical defect that semi-bridge autonomous electric ballast exists! It also is the main cause of why damaging easily.

Except the characteristic of above-mentioned half-bridge electronic ballast, half-bridge circuit also exists, and after supply power voltage raises, can not control power output, and cause circuit overloads and damage, or the like;

Summary of the invention

For addressing the above problem, the objective of the invention is to, a kind of single resonant circuit device is provided, gaseous discharge lamp is carried out permanent power drive, use this device can directly utilize the alternating current of electrical network to be transformed to high-frequency alternating current gas discharge lamp lamp luminescence, and adopt the luminous duty cycle circuit of change to regulate brightness, do not need to change input voltage, in wide-voltage range, carry out permanent power drive, improved the reliability of device again, compare the efficient of raising (35%-60%) with Inductive ballast, with half-bridge electronic ballast ratio economize on electricity 5%-20%;

For achieving the above object, the drive unit of a kind of gaseous discharge lamp provided by the invention comprises:

Transformer, (number of turn is: Np), (number of turn is secondary winding Ns: Ns), (number of turn is: Nf) (number of turn is auxiliary winding Nf: Nv) form with auxiliary winding Nv by elementary winding Np; Be used to produce high frequency voltage; 1. the two ends of described elementary winding Np wherein are end of the same name on being connected respectively to 1. and 2. holding; 6. the two ends of described secondary winding Ns wherein are end of the same name on being connected respectively to 6. and 10. holding; 5. the two ends of described auxiliary winding Nf wherein are end of the same name on being connected respectively to 3. and 5. holding; 3. the two ends of described auxiliary winding Nv wherein are end of the same name on being connected respectively to 3. and 4. holding; The top (or terminal) that described end of the same name is a winding direction of winding unanimity; Described 1., 2..。。, 10. end number is the end number of the binding post on the transformer framework, just is used for the convenient winding relative position each other of distinguishing with related, described end number fully can be from new arrangement;

1. the end of described transformer is connected to the anode of DC power supply Vin, and described Vin is a supply voltage; 2. the end of described transformer is connected to the drain D (or collector electrode c) of switching tube, 3. the end of described transformer is connected to the negative terminal of DC power supply Vin, 4. the end of described transformer and 5. end be connected respectively to pulse control circuit, 10. the end of described transformer is connected to an end of resonant capacitance, the other end of described resonant capacitance is connected to an end of gaseous discharge lamp, the other end of described gaseous discharge lamp is connected to the negative terminal of DC power supply Vin, and the 6. end of wherein said transformer is connected to the 2. end of described transformer again;

Switching tube, form by drain D (or collector electrode c), grid G (or base stage b) and source S (or emitter e), wherein said drain D (or collector electrode c) is connected to the 2. end of transformer, described source S (or emitter e) is connected to the negative terminal of described DC power supply Vin, described grid G (or base stage b) is connected to pulse control circuit, and described switching tube and described transformer produce high-frequency ac voltage under the effect of pulse control circuit;

Pulse control circuit, described pulse control circuit have 6 leading foots: 1., 2., 3., 4., 5. and 6. pin; 1. the pin of described pulse control circuit is connected to the positive pole of described DC power supply Vin, 2. the pin of described pulse control circuit is connected to the 5. end of described transformer, 3. the pin of described pulse control circuit is connected to the negative pole of described DC power supply Vin, 4. the pin of described pulse control circuit is connected to the 4. end of described transformer, 5. the pin of described pulse control circuit is connected to the output of unusual control circuit, and the 6. pin of described pulse control circuit is connected to the grid G (or base stage b) of described switching tube; From the 4. end of described transformer and 5. end be connected respectively to described pulse control circuit 2. and 4. pin signal, processing through pulse control circuit inside, produce frequency modulation and widened pulse, go to control the grid G (or base stage b) of described switching tube, reach the output frequency and the power of the described gas discharge lamp drive of control (ballast);

Unusual control circuit, described unusual control circuit has 4 leading foots: 1., 2., 3. and 4. pin, described 1. pin is connected to the described pipe drain D (or collector electrode c) of opening the light, described 2. pin (for the output of unusual control circuit) is connected to the 5. pin of described pulse control circuit, described 3. pin is connected to the negative pole of described DC power supply Vin, described 4. pin is connected to the 5. end of described transformer, described unusual control circuit is monitored the pulse voltage on the described pipe drain D (or collector electrode c) of opening the light, monitor with the 5. pulse voltage of end described transformer, the abnormal signal that monitors is handled, and the 5. pin that sees through described pulse control circuit controls and protects described switching tube, makes it to be in a safe condition;

Resonant capacitance plays stopping direct current and resonance, be connected to that 10. described transformer is held and an end of gaseous discharge lamp between, be used for the winding inductance resonance with described transformer, produce high frequency voltage and light gaseous discharge lamp; Described resonant capacitance also makes impulse wave become quasi-sine-wave;

Preheat starting circuit applied (about 0.4 second) preheat curent to Filament of fluorescent lamp before fluorescent lamp lighting, be used for the preheat fluorescent lamp fluorescent tube, turn-offed the preheat curent that Filament of fluorescent lamp applies after fluorescent lamp lighting; Described preheat starting circuit is to be connected on middle PCT (positive temperature coefficient) thermistor of two-stage filament, when high frequency voltage puts on described gas discharge lamp tube two ends, described voltage puts on the described PCT by the filament of two-stage, through (about 0.4 second) time PCT heating disconnection (becoming high resistant), like this, owing to having flow through heating current, filament just described gas discharge lamp tube has been carried out preheating; Described preheat starting circuit also can be cancelled (or need not): because described gaseous discharge lamp fluorescent tube is equivalent to zero load before described gaseous discharge lamp fluorescent tube is unignited, because the leakage inductance of transformer can produce instantaneous high pressure, when the power designs of described instantaneous high pressure gets when enough big, make described gaseous discharge lamp fluorescent tube skip the glow discharge stage, directly arrive the arc discharge stage (be equivalent to automobile at a high speed cross the pit wheel be unsettled and cross the same), light described gaseous discharge lamp fluorescent tube, make described gaseous discharge lamp fluorescent tube reach the purpose of life-saving; In the application scenario of receiving lamp or Metal halogen lamp, described pipeline start up by preheating triggers (device) exactly and starts, and at described receive lamp or the Metal halogen lamp of trigger voltage smaller or equal to 3000V, can cancel and trigger startup, and this circuit oneself just can start;

When DC power supply Vin is connected to circuit, make described switching tube conducting by described pulse control circuit, described DC power supply voltage Vin is added on the elementary winding Np, simultaneously described transformer secondary output winding Ns produces negative pulse voltage, promptly export the negative half period of described high-frequency ac voltage, to described resonant capacitance charging, charging current is by the negative terminal of described DC power supply Vin, through (series connection) described gaseous discharge lamp, to the described resonant capacitance of connecting with it, arrive described transformer secondary output winding Ns (10.-6.) again, again the drain D of the switching tube of process saturation conduction and the negative terminal that source S is got back to described DC power supply Vin; Simultaneously, the auxiliary winding Nf (3. and 5. going up) of described transformer produces positive pulse voltage, by described pulse control circuit, further acts on described switching tube, the control power output; When described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, then described primary winding Np and DC power supply Vin disconnect, because the energy on the described elementary winding Np can not suddenly change, so can not be with failure of current or change direction in instantaneous, then the 10. terminal potential of described Secondary winding of transformer Ns becomes positive polarity by negative polarity, the positive pulse voltage that then puts on the described gaseous discharge lamp is: described Secondary winding of transformer Ns and secondary winding Np go up the positive pulse addition of producing, add described supply voltage Vin and described resonant capacitance at the voltage that negative half period filled, and light gaseous discharge lamp (fluorescent tube) by described resonant capacitance; Simultaneously, 4. and 3. described auxiliary winding Nv goes up and produces positive pulse voltage, be added on the described pulse control circuit, by the inner rectification of described pulse control circuit, produce direct voltage Vv and be used to supply described pulse control circuit, simultaneously pulse control circuit is also by the described direct voltage Vv of sampling, and 10. and 6. that stablizes described primary winding Ns goes up the output voltage that produces; And under the effect of resonant capacitance, make circuit produce resonance, output high frequency quasi-sine-wave:

When the switching tube saturation conduction, described DC power supply voltage is added on the elementary winding Np as mentioned above, and simultaneously 10. going up to 6. end of secondary winding Ns produced negative pulse voltage and be:

Vo _NegativeThe * of=-(Ns/Np) Vin;

By gaseous discharge lamp resonant capacitance is charged, because when the switching tube saturation conduction, described transformer 6. termination has led to the negative terminal of DC power supply Vin, and the voltage Vc after the stable state on the resonant capacitance is:

Vc=Vo _NegativeThe * of=-(Ns/Np) Vin;

Described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, at once on-off switching tube, then described primary winding Np and described DC power supply Vin disconnect, at this moment, because the energy on the elementary winding Np of described transformer can not suddenly change, thus can not be with failure of current or change direction in instantaneous, and then the production positive pulse voltage of 10. and 6. holding of secondary winding Ns is:

Vo1 _Just=(Ns/Nv) * Vv;

The production positive pulse voltage of 1. and 2. holding of described Secondary winding of transformer Np is:

Vo2 _Just=(Np/Nv) * Vv;

Then described transformer 10. hold and described DC power supply negative terminal between output positive pulse voltage (the positive half cycle of high frequency quasi-sine-wave) be:

Vo _Just=Vo1 _Just+ Vo2 _Just+ Vin+Vc=((Ns+Np)/Nv) * Vv+ (1+ (Ns/Np)) * Vin;

To gaseous discharge lamp power supply, this supply current and to the magnetic core degaussing makes magnetic core work to third quadrant by the discharge of resonant capacitance; Described voltage Vv value is determined by the voltage control circuit of pulse control circuit;

Above-mentioned pulse voltage makes circuit produce resonance under the effect of resonant capacitance, output high frequency quasi-sine-wave; The voltage that puts on the gas discharge lamp tube is:

V _Lamp=Vo/0.7072

So circulation goes round and begins again, and produces high_frequency sine wave and is added on the gaseous discharge lamp, makes it luminous; The numerical value that changes Np, Ns and Nv can change the voltage of output, to adapt to the gaseous discharge lamp of different parameters;

The drive unit of another kind of gaseous discharge lamp provided by the invention comprises:

Transformer, (number of turn is: Np), secondary winding Ns becomes by W thigh and winding that (number of turn is: Ns), (number of turn is: Nf) (number of turn is auxiliary winding Nf: Nv) form with auxiliary winding Nv by elementary winding Np; Be used to produce high frequency voltage; 1. the two ends of described elementary winding Np wherein are end of the same name on being connected respectively to 1. and 2. holding; 6. the end of described multiply (establishing W=4) secondary winding Ns all is connected to end, the other end and is connected respectively to 7., 8., 9. and 10. on the end, wherein 6. is end of the same name; 5. the two ends of described auxiliary winding Nf wherein are end of the same name on being connected respectively to 3. and 5. holding; 3. the two ends of described auxiliary winding Nv wherein are end of the same name on being connected respectively to 3. and 4. holding; The top (or terminal) that described end of the same name is a winding direction of winding unanimity; Described 1., 2..。。, 10. end number is the end number of the binding post on the transformer framework, just is used for the convenient winding relative position each other of distinguishing with related, described end number fully can be from new arrangement;

1. the end of described transformer is connected to the anode of DC power supply Vin, and described Vin is a supply voltage; 2. the end of described transformer is connected to the drain D (or collector electrode c) of switching tube, 3. the end of described transformer is connected to the negative terminal of DC power supply Vin, 4. the end of described transformer and 5. end be connected respectively to pulse control circuit, described transformer 7., 8., 9. and 10. hold and be connected respectively to

resonant capacitance

1,2, an end of 3 and 4, described

resonant capacitance

1,2,3 and 4 the other end is connected respectively to

gaseous discharge lamp

1,2, an end of 3 and 4, described

gaseous discharge lamp

1,2,3 and 4 the other end all is connected to the negative terminal of DC power supply Vin, and the 6. end of wherein said transformer is connected to the 2. end of described transformer again;

Resonant capacitance

1,2,3 and 4, play stopping direct current and resonance, being connected respectively to described transformer 7., 8., 9. and 10. holds, the

resonant capacitance

1,2,3 and 4 the other end are connected respectively to an end of

gaseous discharge lamp

1,2,3 and 4, be used for the winding inductance resonance with described transformer, produce high frequency voltage and light gaseous discharge lamp; Described resonant capacitance also makes impulse wave become quasi-sine-wave;

Preheat starting circuit applied (about 0.4 second) preheat curent to Filament of fluorescent lamp before fluorescent lamp lighting, be used for the preheat fluorescent lamp fluorescent tube, turn-offed the preheat curent that Filament of fluorescent lamp applies after fluorescent lamp lighting; Described preheat starting circuit is to be connected on middle PCT (positive temperature coefficient) thermistor of two-stage filament, when high frequency voltage puts on described gas discharge lamp tube two ends, described voltage puts on the described PCT by the filament of two-stage, through (about 0.4 second) time PCT heating disconnection (becoming high resistant), like this, owing to having flow through heating current, filament just described gas discharge lamp tube has been carried out preheating; Described preheat starting circuit also can be cancelled (or need not): described gaseous discharge lamp fluorescent tube is equivalent to zero load before described gaseous discharge lamp fluorescent tube is unignited, because the leakage inductance of transformer can produce instantaneous high pressure, when the power designs of described instantaneous high pressure gets when enough big, make described gaseous discharge lamp fluorescent tube skip the glow discharge stage, directly arrive the arc discharge stage (be equivalent to automobile at a high speed cross the pit wheel be unsettled and cross the same), light described gaseous discharge lamp fluorescent tube, make described gaseous discharge lamp fluorescent tube reach the purpose of life-saving; In the application scenario of receiving lamp or Metal halogen lamp, described pipeline start up by preheating triggers (device) exactly and starts, and at described receive lamp or the Metal halogen lamp of trigger voltage smaller or equal to 3000V, can cancel and trigger startup, and this circuit oneself just can start;

When DC power supply Vin is connected to circuit, make described switching tube conducting by described pulse control circuit, described DC power supply voltage Vin is added on the elementary winding Np, simultaneously described transformer secondary output winding Ns produces negative pulse voltage, promptly export the negative half period of described high-frequency ac voltage, respectively to described

resonant capacitance

1,2,3 and 4 chargings, charging current is divided the negative terminal of the described DC power supply Vin of four routes, respectively by described

gaseous discharge lamp

1,2,3 and 4, to the described resonant capacitance 1 of connecting with it, 2,3 and 4, arrive described transformer secondary output winding Ns more 7., 8., 9. and 10. hold to arrive 6. end, again the drain D of the switching tube of process saturation conduction and the negative terminal that source S is got back to described DC power supply Vin; Simultaneously, the auxiliary winding Nf (3. and 5. going up) of described transformer produces positive pulse voltage, by described pulse control circuit, further acts on described switching tube, the control power output; When described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, then described primary winding Np and DC power supply Vin disconnect, because the energy on the described elementary winding Np can not suddenly change, so can not be with failure of current or change direction in instantaneous, then the 10. terminal potential of described Secondary winding of transformer Ns becomes positive polarity by negative polarity, put on the described gaseous discharge lamp, the described positive pulse voltage that puts on the described gaseous discharge lamp is: described Secondary winding of transformer Ns and secondary winding Np go up the positive pulse addition of producing, add described supply voltage Vin and described resonant capacitance at the voltage that negative half period filled, and light gaseous discharge lamp (fluorescent tube) by described resonant capacitance; Simultaneously, 4. and 3. described auxiliary winding Nv goes up and produces positive pulse voltage, be added on the described pulse control circuit, by the inner rectifying and wave-filtering of described pulse control circuit, produce direct voltage Vv and be used to supply described pulse control circuit, 10. and 6. simultaneously, pulse control circuit is also by the described direct voltage Vv of sampling, and that stablizes described primary winding Ns goes up the output voltage that produces; And under the effect of resonant capacitance, make circuit produce resonance, output high frequency quasi-sine-wave:

When the switching tube saturation conduction, supply voltage is added on the elementary winding Np as mentioned above, and simultaneously 10. going up to 6. end of secondary winding Ns produced negative pulse voltage and be:

Vo _NegativeThe * of=-(Ns/Np) Vin;

Vc=Vo _NegativeThe * of=-(Ns/Np) Vin;

Described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, at once on-off switching tube, then described primary winding Np and DC power supply Vin disconnect, at this moment, because the energy on the elementary winding Np of described transformer can not suddenly change, thus can not be with failure of current or change direction in instantaneous, and then the production positive pulse voltage of 10. and 6. holding of secondary winding Ns is:

Vo1 _Just=(Ns/Nv) * Vv;

Vo2 _Just=(Np/Nv) * Vv;

Then described transformer 10. hold and the DC power supply negative terminal between output positive pulse voltage (the positive half cycle of high_frequency sine wave) be:

Vo _Just=Vo1 _Just+ Vo2 _Just+ Vin+Vc=((Ns+Np)/Nv) * Vv+ (1+ (Ns/Np)) * Vin;

V _Lamp=Vo/0.7072

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, it is characterized in that comprising: two identical described

transformers

1 and 2;

It is characterized in that: described

transformer

1 and 2, the multi-lamp syste that is composed in series by elementary winding Np1 and Np2;

1. the end of described transformer 2 is connected to the anode of DC power supply Vin, and the 1. end of described transformer 1 is connected to the 2. end of described transformer 2, and the 2. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; Described

transformer

1 and 2 6. end all are connected to the drain D (or collector electrode c) of switching tube; Described

transformer

1 and 2 10. end are connected respectively to an end (or 7., 8., 9. and 10. end is connected respectively to an end of

resonant capacitance

1,2,3 and 4) of described resonant capacitance separately,

transformer

2 or 1 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit; Other connections or structure remain unchanged;

Its feature also is: described

transformer

1 and 2, the system that is composed in series respectively by primary and secondary winding Np2 and Np1, Ns2 and Ns1;

1. the end of described transformer 2 is connected to the anode of DC power supply Vin, and the 1. end of described transformer 1 is connected to the 2. end of described transformer 2, and the 2. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; 10. the end of described transformer 1 is connected to the 6. end of described transformer 2, and the 6. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; 10. the end of described transformer 2 is connected to an end of described resonant capacitance,

transformer

Its feature also is: described

transformer

1 and 2, the multi-lamp syste that is composed in parallel behind series diode a and the b respectively by elementary winding Np1 and Np2;

Described

transformer

1 and 2 1. end all are connected to the anode of DC power supply Vin, 2. the end of described transformer 1 is connected to the positive pole of described diode a, 2. the end of described transformer 2 is connected to the positive pole of described diode b, and the negative pole of described diode a and b all is connected to the drain D of switching tube (or collector electrode c); 10. the end of described transformer 1 is connected to the 6. end of described transformer 2, and the 6. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; Described

transformer

1 and 2 10. end are connected respectively to an end of described resonant capacitance separately,

transformer

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, it is characterized in that also comprising: current sampling circuit; Be used for control output (maximum) power, also be used for protective circuit simultaneously and avoid damaging;

It is characterized in that, described current sampling circuit seals in the source S (or emitter e) of described switching tube between the negative terminal of described DC power supply Vin, source S (or emitter e) electric current to described switching tube is taken a sample, and be the source S of described switching tube (or emitter e) current conversion voltage, sampling value is delivered to the 2. pin of described pulse control circuit and the 4. pin of described unusual control circuit, described pulse control circuit is controlled (or restriction) to the electric current of described sampling, makes peak power output keep substantially constant; Simultaneously, cancel (5.-3. end) winding Nf of described transformer;

Its feature also is, described current sampling circuit seals in described gaseous discharge lamp between the negative terminal of described DC power supply Vin, electric current to described gaseous discharge lamp is taken a sample, and be described gaseous discharge lamp current conversion voltage, sampling value is delivered to the 2. pin of described pulse control circuit and the 4. pin of described unusual control circuit, described pulse control circuit is controlled (or restriction) to the electric current of described sampling, makes power output keep substantially constant; Simultaneously, cancel (5.-3. end) winding Nf of described transformer;

Described current sampling circuit is made of resistance, flows through the electric current of described resistance, produces voltage at the two ends of described resistance;

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, be input as the occasion of Alternating Current Power Supply, it is characterized in that also comprising: rectification, filtering and Passive Power factor correcting circuit are used to replace above-mentioned DC power supply Vin:

Described rectification is made up of rectifier bridge (with four rectifier diodes), is used for the ac voltage rectifier of input is become pulsed dc voltage;

Described filtering, form by electric capacity 4, and be connected to the position of above-mentioned DC power supply Vin, be used for described pulsed dc voltage smoothing, described filter capacitor 4 both positive and negative polarities are corresponding with the both positive and negative polarity position of described DC power supply Vin, and the voltage on the described filter capacitor 4 is described Vin;

Described Passive Power factor correcting circuit comprises: the high frequency pump that fast diode 2 and electric capacity 3 are formed,

inductance

1 and 2,

electric capacity

1 and 2 high-frequency circuits of forming, be used to make the alternating current of input continuous, improve the power factor (PF) of circuit and the total harmonic distortion of reduction alternating current;

The negative pole of described diode 2 is connected to the positive pole of described filter capacitor 4, the positive pole of described diode 2 is connected to the positive pole of described rectifier bridge, the negative pole of described filter capacitor 4 is connected to the negative pole of described rectifier bridge, and the other end of described gaseous discharge lamp (being connected to that end of described DC power supply Vin negative pole originally) is connected to the positive pole of described rectifier bridge; One end of described electric capacity 3, be connected to the positive pole of described diode 2, the other end of described electric capacity 3 is connected to the drain D (or collector electrode C) of described switching tube, the two ends of described electric capacity 2 are connected respectively to the both positive and negative polarity of described rectifier bridge, two ac input ends of described rectifier bridge are connected respectively to an end of described

inductance

1 and 2, and the described

inductance

1 and 2 the other end are connected respectively to the two ends of described electric capacity 1; The N of AC power and L line are connected respectively to the two ends of described electric capacity 1;

Like this, be connected to the two ends of described electric capacity 1 when AC power after, just from the positive and negative terminal output dc voltage Vin of described filter capacitor 4, simultaneously, the 10. end of described Secondary winding of transformer Ns (or 7., 8., 9. and 10. hold) output high voltage, when the output high voltage negative half period, the 10. end of described Secondary winding of transformer Ns (or 7., 8., 9. and 10. hold) the output negative voltage, described negative voltage is connected to the positive pole of described rectifier bridge by described resonant capacitance and described gas discharge lamp tube, and the alternating current of input is by described rectifier bridge, described gaseous discharge lamp is to described resonant capacitance (or

resonant capacitance

1,2,3 and 4) charging; When the positive half cycle of output high voltage, the 10. end of described Secondary winding of transformer Ns (or 7., 8., 9. and 10. hold) the output positive voltage, this positive voltage adds the above resonant capacitance (or resonant capacitance 1,2,3 and 4) voltage on (voltage that is recharged at negative half period) is by described gaseous discharge lamp and 2 pairs of described filter capacitors 4 chargings of diode, because the very big charging voltage of described filter capacitor 4 capacity (resonant capacitance relatively) rises seldom, simultaneously, at the instantaneous value of AC supply voltage during less than the voltage at described electric capacity 4 two ends, rectifier bridge passes through no current, be that described inductance 1 and 2 passes through no current, because inductive current can not suddenly change, again because the capacity of described electric capacity 1 is bigger, an end (promptly being connected to the N of AC power and that end of L) that high-frequency current is equivalent to described inductance 1 and 2 links together, the described inductance 1 and 2 the other end will distinguish and by rectifier bridge to described electric capacity 2 chargings, keep rectifier bridge to be in conducting state, also promptly kept the continuous of alternating current; When the high frequency voltage negative half period, 2 pairs of discharges such as described gaseous discharge lamp of described electric capacity; Described electric capacity 3 is mainly used in EMI (electromagnetic interference) that reduces circuit and the power factor (PF) that further improves device;

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, be input as the occasion of Alternating Current Power Supply, it is characterized in that also comprising: passive power factor corrective circuit and brightness adjustment control, the brightness that is used to replace above-mentioned DC power supply Vin and regulates described gaseous discharge lamp; Described passive power factor corrective circuit has the adjustable output voltage function, control the size of the output voltage V in of described passive power factor corrective circuit by described adjusting control circuit, change the power output of described air discharge lamp driving mechanism (ballast), thereby realized light modulation; Its feature is that also the input control signal of described adjusting control circuit can be (0-10V) analog quantity or pulse, also can be coded digital signal, can also be the digital signal of infrared or rf modulations;

Described passive power factor corrective circuit comprises: rectifier bridge, inductive transformer, L6561/L6562, field effect transistor Q1, diode D1, resistance R 1/R2/R3/R4/R15 and capacitor C 1/C2/C3/C4/C6, and constituting output voltage V in is the adjustable dc voltage source of 40-200V scope;

The input of described rectifier bridge is connected respectively on the N and L line of AC power, output is connected respectively to the two ends of described

capacitor C

6,1. the pin of described inductive transformer is connected to the positive pole of described rectifier bridge, 3. pin is connected to the drain D of described field effect transistor Q1,4. and 9. pin is connected to the negative pole of described rectifier bridge, 5. pin is connected to the 5. pin of described L6561/L6562 by described resistance R 3, (12) pin is connected to the positive pole of described diode D1, the negative pole of described diode is connected to the positive pole of described capacitor C 4, the negative pole of described capacitor C 4 is connected to the negative pole of described rectifier bridge, the source S of described field effect transistor Q1 is connected to the negative pole of described rectifier bridge by described resistance R 15, the grid G of described field effect transistor Q1 is connected to the 7. pin of described L6561/L6562 by described resistance R 4, the 4. pin of described L6561/L6562 is connected to the source S of described field effect transistor Q1,6. pin is connected to the negative pole of described rectifier bridge, 8. pin is connected on the anodal VCC of accessory power supply, also be connected to simultaneously the positive pole of described

capacitor C

3,3. pin is connected to the public connecting end of R1 and R2, the other end of described resistance R 1 is connected to the positive pole of described rectifier bridge, the other end of described resistance R 2 is connected to the negative pole of described rectifier bridge, the negative pole of described capacitor C 3 is connected to the negative pole of described rectifier bridge, the 3. pin of the described L6561/L6562 of two ends difference link of described capacitor C 1 and the negative pole of described rectifier bridge, the two ends of described capacitor C 2 are 1. pin and the 2. pin of the described L6561/L6562 of link respectively, one end of described resistance R 16 is connected to the positive pole of described rectifier bridge, and the other end is connected to the positive pole of described capacitor C 3;

Described adjusting control circuit comprises: CD4051, microcontroller MCU/DSP, diode D2, resistance R 5/R6/R7/R8/R9/R10/R11/R12/R13/R14 and capacitor C 5, constitute program-controlled potentiometer, direct voltage to described output carries out the dividing potential drop sampling, the voltage of sampling is delivered to the 1. pin of described L6561/L6562, make the direct voltage of output controlled, promptly control described CD4051 and connect certain divider resistance by described microcontroller MCU/DSP, obtain a certain partial pressure value and deliver to the 1. pin of described L6561/L6562, thereby the described voltage Vin that finishes certain value of control exports;

The positive pole of described diode D2 is connected to the 4. end of the transformer of described air discharge lamp driving mechanism, negative pole is connected to the positive pole of described capacitor C 5 by described resistance R 14, also be connected to simultaneously the anodal VCC of described accessory power supply and (16) pin of described CD4051, the negative pole of described capacitor C 5 is connected to the negative pole of described rectifier bridge, described CD4051 9., 10. be connected respectively on the described microcontroller MCU/DSP with (11) pin, 6., 7. and 8. pin all is connected to the negative pole of described rectifier bridge, 3. pin is connected to the 1. pin of described passive power factor corrective circuit L6561/L6562,4. pin is connected to the public connecting end of described resistance R 5 and R6,2. pin is connected to the public connecting end of described resistance R 6 and R7,5. pin is connected to the public connecting end of described resistance R 7 and R8,1. pin is connected to the public connecting end of described resistance R 8 and R9, (12) pin is connected to the public connecting end of described resistance R 9 and R10, (15) pin is connected to the public connecting end of described resistance R 10 and R11, (14) pin is connected to the public connecting end of described resistance R 11 and R12, (13) pin is connected to the public connecting end of described resistance R 12 and R13, the other end of wherein said resistance R 5 is connected to the negative pole of described rectifier bridge, and the other end of described resistance R 13 is connected to the positive pole of described capacitor C 4;

When AC power (N and L) inserts described rectifier bridge, just from the both positive and negative polarity output dc voltage Vin of described capacitor C 4;

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, it is characterized in that described unusual control circuit comprises: resistance R 3, R13, R14, R15, R16, R17 and R18, capacitor C 5, C6 and C7, Zener diode Z1, diac DB1, triode Q3 and Q4; Described resistance R 18 can be composed in series with piezo-resistance or TVS or a plurality of conventional, electric-resistance;

Described resistance R 13 and the 5 two ends parallel connections of described capacitor C wherein an end are connected to the emitter E of described triode Q4, the other end is connected to the base stage b of described triode Q4, described resistance R 15 and the 6 two ends parallel connections of described capacitor C wherein an end are connected to the emitter E of described triode Q3, the other end is connected to the base stage b of described triode Q3, one end of described resistance R 14 is connected to the emitter E of described triode Q4, the other end of described resistance R 14 is connected to the 2. pin of described unusual control circuit, the base stage b of described triode Q4 is connected to the collector electrode C of described triode Q3, the base stage b of described triode Q3 is connected to the collector electrode C of described triode Q4, the emitter E of described triode Q3 is connected to the 3. pin of described unusual control circuit, one end of described resistance R 16 is connected to the base stage b of described triode Q3, the other end of described resistance R 16 is connected to an end of described diac, the other end of described diac is connected to the positive pole of described capacitor C 7, the negative pole of described capacitor C 7 is connected to the 3. pin of described unusual control circuit, the two ends of described resistance R 17 are in parallel with the two ends of described capacitor C 7, one end of described resistance R 18 is connected to the positive pole of described capacitor C 7, the other end of described resistance R 18 is connected to the 1. pin of described unusual control circuit, one end of described resistance R 3 is connected to the base stage b of described triode Q3, the other end of described resistance R 3 is connected to the positive pole of described Zener diode Z1, and the negative pole of described Zener diode Z1 is connected to the 4. pin of described unusual control circuit;

Described triode Q3 and Q4 form a kind of bistable trigger-action circuit, when the current potential of the 1. pin of described unusual control circuit raises, when making the voltage of described capacitor C 7 positive poles be higher than described diac DB1 by described resistance R 18, the voltage of described C7 discharges to the base stage b of described triode Q3 by described R16, make described triode Q3 conducting, because the base stage b of described triode Q4 is connected to the collector electrode C of described triode Q3, therefore also conducting of described triode Q4, again because the base stage b of described triode Q3 is connected to the collector electrode C of described triode Q4, further make all saturation conductions of triode Q3 and Q4, again because described resistance R 14 is connected emitter E and 2. between the pin of described unusual control circuit of described Q4, thereby the 2. pin that makes unusual control circuit is by described resistance R 14, described triode Q4 (the E-C utmost point) and Q3 (the E-C utmost point) are connected to the 3. pin (being the negative pole of described DC power supply Vin) of described unusual control circuit, therefore, by described pulse control circuit 5., (or base stage b) is connected to the negative pole of described DC power supply Vin the grid G of described switching tube, thereby protected described switching tube; In like manner, because the pulse voltage (Vf) of described Transformer Winding Nf (5.-3. end) is proportional to described DC power supply voltage (Vf=Vin* (Nf/Np)), be connected to the 4. pin of described unusual control circuit by the 5. end of described transformer, the pulse voltage that samples is added to the negative pole of described Zener diode Z1, when described DC power supply electric voltage exception raises, described Zener diode Z1 conducting, pulse current arrives the base stage b of described triode Q3 by described resistance R 3, make described triode Q3 saturation conduction, then as mentioned above, protected switching tube to avoid damaging;

Can also replace the circuit of being formed by described triode Q3 and Q4, resistance R 13 capacitor C 5 with controllable silicon, it is the end (other end connection status of R14 is constant) that described silicon controlled anode A is connected to described resistance R 14, described silicon controlled negative electrode K is connected to the 3. pin of described unusual control circuit, described silicon controlled grid G is connected to the common port (other end connection status of described C6/R15/R16/R3 is constant) of described C6/R15/R16/R3, obtains above-mentioned identical defencive function;

Provided by the inventionly it is characterized in that based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof described pulse control circuit also comprises: power control circuit, regenerative circuit, voltage control circuit and biasing circuit;

Described power control circuit is made up of triode Q1, resistance R 2, R4, R5, capacitor C 1 and Zener (zener) diode Z2;

The collector electrode C of described triode Q1 is connected to the 5. pin of described pulse control circuit and the negative pole of described biasing circuit diode D1, the emitter E of described triode Q1 is connected to the 3. pin of described pulse control circuit, one end of described resistance R 2 is connected to the base stage b of described triode Q1, the other end of described resistance R 2 is connected to an end of described resistance R 4, the other end of described resistance R 4 is connected to the 2. pin of described pulse control circuit, one end of described resistance R 5 is connected to the common port (being the end that resistance R 2 is connected with R4) of described resistance R 2 and R4, the other end of described resistance R 5 is connected to the positive pole of described Zener diode Z2, the negative pole of described Zener diode Z2 is connected to the 2. pin of described pulse control circuit, one end of described capacitor C 1 is connected to the common port of described resistance R 2 and R4, and the other end of described capacitor C 1 is connected to the 3. pin of described pulse control circuit;

Described power control circuit is used for when different power voltage (in certain scope), produces the different output pulse of pulsewidth and offers switching tube, reaches the effect of control power output;

Described regenerative circuit is made up of resistance R 10, R11, capacitor C 2, C4 and Zener diode Z5;

One end of described capacitor C 4 is connected to the 2. pin of described pulse control circuit, the other end of described capacitor C 4 is connected to the positive pole of described Zener diode Z5, the negative pole of described Zener diode Z5 is connected to an end of described resistance R 10, the other end of described resistance R 10 is connected to the positive pole of the diode D1 of described biasing circuit, one end of described resistance R 11 is connected to the positive pole of described Zener diode Z5, the other end of resistance R 11 is connected to an end of described capacitor C 2, and the other end of described capacitor C 2 is connected to the positive pole of described biasing circuit diode D1;

Described regenerative circuit under different power voltage, is used for providing reliable positive feedback to switching tube;

Described voltage control circuit is made up of triode Q2, resistance R 8, R9, R12, capacitor C 3, diode D2 and Zener diode Z4;

The collector electrode C of described triode Q2 is connected to the 5. pin of described pulse control circuit, the emitter E of described triode Q2 is connected to the 3. pin of described pulse control circuit, the end of described resistance R 8 and R9 all is connected to the base stage B of described triode respectively, the other end of described resistance R 8 is connected to the emitter E of described triode Q2, the other end of described resistance R 9 is connected to the positive pole of Zener diode Z4, the negative pole of described Zener diode Z4 is connected to the negative pole of described diode D2, described diode D2 positive pole is connected to the 4. pin of described pulse control circuit, one end of described resistance R 12 and described capacitor C 3 all is connected to the emitter E of described triode Q2, and the other end of described resistance R 12 and described capacitor C 3 all is connected to the negative pole of described diode D2;

The positive pulse of the winding Nv of described transformer (4.-3. end), by described diode D2 rectification, after described capacitor C 3 filtering, produce a described reference voltage Vv, dividing potential drop by described Zener diode Z4 and described resistance R 9 and R8, feed the base stage b of described triode Q2, when described reference voltage Vv is higher than the Zener voltage of described Zener diode Z4, described Zener diode Z4 conducting, cause described triode Q2 conducting, the pulse advancing that feeds switching tube grid G (or base stage b) is finished, promptly shortened the width of the conducting pulse of switching tube, output voltage is reduced, therefore reach the effect of regulated output voltage;

Described biasing circuit is made up of resistance R 1, R6, R7 diode D1 and Zener diode Z3;

One end of described resistance R 1 is connected to the positive pole of described diode D1, the other end of resistance R 1 is connected to the 1. pin of described pulse control circuit, the negative pole of described diode D1 is connected to the 5. pin of described pulse control circuit, one end of described resistance R 6 is connected to the 6. pin of described pulse control circuit, the other end of described resistance R 6 is connected to the positive pole of described diode D1, the negative pole of described Zener diode Z3 is connected to the positive pole of described diode D1, the positive pole of described Zener diode Z3 is connected to the 3. pin of described pulse control circuit, one end of described resistance R 7 is connected to the negative pole of described Zener diode Z3, and the other end of described resistance R 7 is connected to the negative pole of the described diode D2 of described voltage control circuit;

Described resistance R 6 is used to prevent the switching tube parasitic oscillation, described resistance R 1 is used for providing the start bias voltage to described switching tube, according to different supply power voltages, described resistance R 1 can be composed in series (improving the withstand voltage of resistance) by a plurality of resistance, described diode D1 is used for improving the efficient of this device, when selecting with ambipolar transistor, described switching tube to replace described diode D1 with short-circuit line (lead), described resistance R 7 is used for providing the stable state bias voltage to described switching tube, described Zener diode Z3 is used for providing gate protection to described switching tube, path is provided for simultaneously the negative pulse of the winding Nf of described transformer;

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, it is characterized in that, described pulse control circuit also comprises: accessory power supply, voltage level conversion, electric current (power) level conversion, microcontroller (MCU/DSP), start-up circuit and output driving circuit;

Described accessory power supply is connected to the 4. pin of described pulse control circuit, and output voltage V v after the rectification is carried out in the pulse of described transformer Nv winding (4.-3. end) output; For described pulse control circuit provides accessory power supply;

Described voltage level conversion, mate in proportion by described voltage Vv and to export microcontroller (MCU/DSP) to, rise by described microcontroller (MCU/DSP) (in this occasion) and to stablize described voltage Vv, work to stablize the voltage that described air discharge lamp driving mechanism is exported indirectly;

Described electric current (power) level conversion, be connected to the 5. pin of described pulse control circuit, electric current (or power) signal level that the outside is connected to the 5. pin of described pulse control circuit is converted to level Vf, described level Vf mates in proportion and exports microcontroller (MCU/DSP) to, by described microcontroller (MCU/DSP) to as (1): as described in being connected to the 5. pin of pulse control circuit as described in the pulse of transformer Nf winding output carry out output voltage V f after the rectification, mate in proportion by described voltage Vf and to export microcontroller (MCU/DSP) to, described voltage Vf is proportional to the supply power voltage of input, play the power output of constant described air discharge lamp driving mechanism and work to limit the peak power output of described air discharge lamp driving mechanism according to the supply power voltage of input; Or to as (2): as described in being connected to the 5. pin of pulse control circuit as described on the switching tube source S (or emitter e) as described in the sampling current Ip of current sampling circuit output control, play the described sampling current Ip of restriction, controlled maximum power output indirectly; Or to as (3): as described in being connected to the 5. pin of pulse control circuit as described on the gaseous discharge lamp as described in the sampling current I of current sampling circuit output control, play constant described sampling current I, constant indirectly power output;

Described microcontroller (MCU/DSP), be used for the described level Vf of input and the triangular wave of Vv and inner generation are compared, produce widened pulse, add that the outside enables control end, describedly enable the 5. pin that control end is connected to described pulse control circuit, described widened pulse is controlled and handled, export described output driving circuit to;

Described start-up circuit is connected to the 1. pin of described pulse control circuit, when described accessory power supply does not also work, gives described pulse control circuit power supply, and start-up system;

Described output driving circuit is connected to the 6. pin of described pulse control circuit, to the widened pulse of described microcontroller (MCU/DSP) output, carries out that electric current amplifies and output, drives the grid G (or base stage b) of described switching tube;

Provided by the invention based on above-mentioned air discharge lamp driving mechanism (ballast) and power factor correction circuit thereof, it is characterized in that described pulse control circuit also comprises: intednsity circuit, be used to control or the luminosity of adjustments of gas discharge lamp, described intednsity circuit comprises: microcontroller (MCU/DSP), by outside input luminance signal to described microcontroller (MCU/DSP), produce distinct pulse widths and (or) pulse of different frequency, feed the grid G of described switching tube, make described air discharge lamp driving mechanism produce the high-frequency impulse (or the while also changes the frequency of pulse) of different duty, the pulsewidth of change or control impuls has just been regulated the brightness of gaseous discharge lamp; Its feature is that also the input control signal of described microcontroller (MCU/DSP) can be (0-10V) analog quantity or pulse, also can be coded digital signal, can also be the digital signal of infrared or rf modulations;

Because the scheme to a kind of air discharge lamp driving mechanism (ballast) of the present invention, it is a kind of device that is based upon on the single resonant circuit, described device has utilized forward mode and flyback mode simultaneously, also utilized resonant circuit, produce high-frequency ac power, gaseous discharge lamp is driven, comprising: transformer, switching tube, resonant capacitance and pulse control circuit etc.; Wherein, transformer produces high-frequency ac voltage under the effect of switching tube, and transformer makes circuit produce resonance under the effect of resonant capacitance, output high frequency quasi-sine-wave, under the control of pulse control circuit, in than wide input voltage range, transformer is exported with substantially invariable high frequency power again; When being input as AC power, also comprise input rectifying, filtering and power factor correction circuit;

Do not have other twin-tube circuits two defective of the damage of conducting simultaneously by all means, the inner power control circuit that increases of device has avoided magnetic core saturated, makes power output constant again, and the life-span of circuit is greatly improved; Directly utilize the AC power of electrical network input to carry out the correction of Passive Power factor, owing to can adopt the cold cathode drive scheme, with respect to adopting the hot cathode drive scheme owing to have filament power consumption and burn-out life, thereby more power saving is long-lived again, because circuit is simple relatively, cost is lower.

Description of drawings

The following drawings helps the detailed the present invention that understands, but only is to explain for example, should not be understood that limitation of the present invention.

Fig. 1 is first embodiment circuit block diagram of device of the present invention;

Fig. 2 is second embodiment circuit block diagram of device of the present invention;

Fig. 3 is the 3rd an embodiment circuit block diagram of device of the present invention;

Fig. 4 is the 4th an embodiment circuit block diagram of device of the present invention;

Fig. 5 is the 5th an embodiment circuit block diagram of device of the present invention;

Fig. 6 is the 6th an embodiment circuit block diagram of device of the present invention;

Fig. 7 is the 7th an embodiment circuit block diagram of device of the present invention;

Fig. 8 is first embodiment circuit block diagram of Fig. 1 band Active PFC;

Fig. 9 is second embodiment circuit block diagram of Fig. 1 band Active PFC;

Figure 10 is a unusual control circuit internal circuit schematic diagram in the device of the present invention;

Figure 11 is first kind of internal circuit schematic diagram of pulse control circuit in the device of the present invention;

Figure 12 is second kind of internal circuit functional-block diagram of pulse control circuit in the device of the present invention;

Figure 13 is grid, base stage and collector electrode or the drain waveforms figure of auto-excitation type half-bridge circuit

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in detail.Following explanation will help those skilled in the art better to understand other advantages of the present invention, purpose and feature.

At first introduce first embodiment of device of the present invention, with reference to figure 1.The drive unit 1 of gaseous discharge lamp shown in Figure 1 is used for that gaseous discharge lamp is carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 1 mainly comprises: transformer 13, resonant capacitance 14, switching tube 12, pulse control circuit 11, control 15 and pre-thermal control 10 unusually.Like this, the drive unit 1 of gaseous discharge lamp, when the input DC power supply Vin place in circuit the time, under the effect of the circuit that transformer 13, switching tube 12, pulse control circuit 11 are formed, under the effect of resonant capacitance 14, make circuit produce resonance, output high frequency quasi-sine-wave, gas discharge lamp is luminous; When device is in abnormality, unusual control circuit 15 monitors when being output as zero load or overvoltage of power supply, the grid G (or base stage b) of unusual control circuit 15 output low level short circuit control switch pipes 12, device is quit work, power cutoff, after the abnormality of having got rid of device, restart power supply, resume work state of circuit.

Described transformer 13 in Fig. 1 circuit, (number of turn is: Np), (number of turn is secondary winding Ns: Ns), (number of turn is: Nf) (number of turn is auxiliary winding Nf: Nv) form with auxiliary winding Nv by elementary winding Np; Be used to produce high frequency voltage; 1. the two ends of described elementary winding Np wherein are end of the same name on being connected respectively to 1. and 2. holding; 6. the two ends of described secondary winding Ns wherein are end of the same name on being connected respectively to 6. and 10. holding; 5. the two ends of described auxiliary winding Nf wherein are end of the same name on being connected respectively to 3. and 5. holding; 3. the two ends of described auxiliary winding Nv wherein are end of the same name on being connected respectively to 3. and 4. holding; The top (or terminal) that described end of the same name is a winding direction of winding unanimity; Described 1., 2..。。, 10. end number is the end number of the binding post on the transformer framework, just is used for the convenient winding relative position each other of distinguishing with related, described end number fully can be from new arrangement;

1. the end of described transformer 13 is connected to the anode of DC power supply Vin, and described Vin is a supply voltage; 2. the end of described transformer 13 is connected to the drain D (or collector electrode c) of switching

tube

12,3. the end of described transformer 13 is connected to the negative terminal of DC power supply Vin, 4. the end of described

transformer

13 and 5. end be connected respectively to 4. and the 2. pin of

pulse control circuit

11,10. the end of described transformer 13 is connected to an end of resonant capacitance 14, the other end of described resonant capacitance 14 is connected to an end of gaseous discharge lamp, the other end of described gaseous discharge lamp is connected to the negative terminal of DC power supply Vin, and the 6. end of wherein said transformer 13 is connected to the 2. end of described transformer 13 again;

Described switching tube 12, form by drain D (or collector electrode c), grid G (or base stage b) and source S (or emitter e), wherein said drain D (or collector electrode c) is connected to the 2. end of transformer 13, described source S (or emitter e) is connected to the negative terminal of described DC power supply Vin, described grid G (or base stage b) is connected to the 6. pin of pulse control circuit 11, and described switching tube 12 and described transformer 13 produce high-frequency ac voltage under the effect of pulse control circuit 11;

Described pulse control circuit has 6 leading foots: 1., 2., 3., 4., 5. and 6. pin; Described 1. pin is connected to the positive pole of described DC power supply Vin, described 2. pin is connected to the 5. end of described transformer 13, described 3. pin is connected to the negative pole of described DC power supply Vin, described 4. pin is connected to the 4. end of described transformer 13, described 5. pin is connected to the output (2. pin) of unusual control circuit 15, and described 6. pin is connected to the grid G (or base stage b) of described switching tube 12; From the 4. end of described

transformer

13 and 5. end be connected respectively to 2. and the 4. pulse signal of pin of described pulse control circuit 11, processing through pulse control circuit 11 inside, produce frequency modulation and widened pulse, go to control the grid G (or base stage b) of described switching tube 12, reach the output frequency and the power of the described gas discharge lamp drive of control (ballast);

Described unusual control circuit 15 has 4 leading foots: 1., 2., 3. and 4. pin, described 1. pin is connected to described pipe 12 drain D (or collector electrode c) of opening the light, described 2. pin (for the output of unusual control circuit) is connected to the 5. pin of described pulse control circuit 11, described 3. pin is connected to the negative pole of described DC power supply Vin, described 4. pin is connected to the 5. end of described transformer 13, pulse voltage on 15 pairs of described pipe 12 drain D (or collector electrode c) of opening the light of described unusual control circuit is monitored, monitor with the 5. pulse voltage of end described transformer 13, the abnormal signal that monitors is handled, and the 5. pin that sees through described pulse control circuit 11 controls and protects described switching tube, makes it to be in a safe condition;

Described resonant capacitance 14 plays stopping direct current and resonance, is connected between the 10. end and an end of gaseous discharge lamp of described transformer 13, is used for the winding inductance resonance with described transformer 13, produces high frequency voltage and lights gaseous discharge lamp; Described resonant capacitance 14 also makes impulse wave become quasi-sine-wave;

Described preheat starting circuit applied (about 0.4 second) preheat curent to Filament of fluorescent lamp before fluorescent lamp lighting, be used for the preheat fluorescent lamp fluorescent tube, turn-offed the preheat curent that Filament of fluorescent lamp applies after fluorescent lamp lighting; Described preheat starting circuit is to be connected on middle PCT (positive temperature coefficient) thermistor of two-stage filament, when high frequency voltage puts on described gas discharge lamp tube two ends, described voltage puts on the described PCT by the filament of two-stage, through (about 0.4 second) time PCT heating disconnection (becoming high resistant), like this, owing to having flow through heating current, filament just described gas discharge lamp tube has been carried out preheating; Described preheat starting circuit also can be cancelled (or need not): because described gaseous discharge lamp fluorescent tube is equivalent to zero load before described gaseous discharge lamp fluorescent tube is unignited, because the leakage inductance of transformer can produce instantaneous high pressure, when the power designs of described instantaneous high pressure gets when enough big, make described gaseous discharge lamp fluorescent tube skip the glow discharge stage, directly arrive the arc discharge stage (be equivalent to automobile at a high speed cross the pit wheel be unsettled and cross the same), light described gaseous discharge lamp fluorescent tube, make described gaseous discharge lamp fluorescent tube reach the purpose of life-saving; In the application scenario of receiving lamp or Metal halogen lamp, described pipeline start up by preheating triggers (device) exactly and starts, and at described receive lamp or the Metal halogen lamp of trigger voltage smaller or equal to 3000V, can cancel and trigger startup, and this circuit oneself just can start;

Now, in conjunction with Figure 11 and Figure 10 device shown in Figure 1 is further elaborated.Figure 11 is the pulse control circuit part of Fig. 1, and Figure 10 is unusual control circuit part.

Figure 11 circuit mainly comprises: power control circuit 11.1, regenerative circuit 11.3, voltage control circuit 11.4 and biasing circuit 11.2;

Described power control circuit 11.1 is made up of triode Q1, resistance R 2, R4, R5, capacitor C 1 and Zener (zener) diode Z2;

The collector electrode C of described triode Q1 is connected to the 5. pin of described pulse control circuit 11 and the negative pole of described biasing circuit 11.2 diode D1, the emitter E of described triode Q1 is connected to the 3. pin of described pulse control circuit 11, one end of described resistance R 2 is connected to the base stage b of described triode Q1, the other end of described resistance R 2 is connected to an end of described resistance R 4, the other end of described resistance R 4 is connected to the 2. pin of described pulse control circuit 11, one end of described resistance R 5 is connected to the public connecting end of described resistance R 2 and R4, the other end of described resistance R 5 is connected to the positive pole of described Zener diode Z2, the negative pole of described Zener diode Z2 is connected to the 2. pin of described pulse control circuit 11, one end of described capacitor C 1 is connected to the common port of described resistance R 2 and R4, and the other end of described capacitor C 1 is connected to the 3. pin of described pulse control circuit 11;

Described power control circuit 11.1 is used for when different power voltage (in certain scope), produces the different output pulse of pulsewidth and offers switching tube 12, reaches the effect of control power output;

Described regenerative circuit 11.3 is made up of resistance R 10, R11, capacitor C 2, C4 and Zener diode Z5;

One end of described capacitor C 4 is connected to the 2. pin of described pulse control circuit 11, the other end of described capacitor C 4 is connected to the positive pole of described Zener diode Z5, the negative pole of described Zener diode Z5 is connected to an end of described resistance R 10, the other end of described resistance R 10 is connected to the positive pole of the diode D1 of described biasing circuit, one end of described resistance R 11 is connected to the positive pole of described Zener diode Z5, the other end of resistance R 11 is connected to an end of described capacitor C 2, and the other end of described capacitor C 2 is connected to the positive pole of described biasing circuit diode D1;

Described regenerative circuit 11.3 under different power voltage, is used for providing reliable positive feedback to switching tube 12;

Described voltage control circuit 11.4 is made up of triode Q2, resistance R 8, R9, R12, capacitor C 3, diode D2 and Zener diode Z4;

The collector electrode C of described triode Q2 is connected to the 5. pin of described pulse control circuit 11, the emitter E of described triode Q2 is connected to the 3. pin of described pulse control circuit 11, the end of described resistance R 8 and R9 all is connected to the base stage b of described triode respectively, the other end of described resistance R 8 is connected to the emitter e of described triode Q2, the other end of described resistance R 9 is connected to the positive pole of Zener diode Z4, the negative pole of described Zener diode Z4 is connected to the negative pole of described diode D2, described diode D2 positive pole is connected to the 4. pin of described pulse control circuit 11, one end of described resistance R 12 and described capacitor C 3 all is connected to the emitter e of described triode Q2, and the other end of described resistance R 12 and described capacitor C 3 all is connected to the negative pole of described diode D2;

Described biasing circuit 11.2 is made up of resistance R 1, R6, R7 diode D1 and Zener diode Z3;

One end of described resistance R 1 is connected to the positive pole of described diode D1, the other end of resistance R 1 is connected to the 1. pin of described pulse control circuit 11, the negative pole of described diode D1 is connected to the 5. pin of described pulse control circuit 11, one end of described resistance R 6 is connected to the 6. pin of described pulse control circuit 11, the other end of described resistance R 6 is connected to the positive pole of described diode D1, the negative pole of described Zener diode Z3 is connected to the positive pole of described diode D1, the positive pole of described Zener diode Z3 is connected to the 3. pin of described pulse control circuit 11, one end of described resistance R 7 is connected to the negative pole of described Zener diode Z3, and the other end of described resistance R 7 is connected to the negative pole of the described diode D2 of described voltage control circuit 11.4; Described resistance R 6 is used to prevent switching tube 12 parasitic oscillation, described resistance R 1 is used for providing the start bias voltage to described switching tube 12, according to different supply power voltages, described resistance R 1 can be composed in series (improving the withstand voltage of resistance) by a plurality of resistance, described diode D1 is used for improving the efficient of this device, when selecting with ambipolar transistor, described switching tube to replace described diode D1 with short-circuit line (lead), described resistance R 7 is used for providing the stable state bias voltage to described switching tube 12, described Zener diode Z3 is used for providing gate protection to described switching tube 12, path is provided for simultaneously the negative pulse of the winding Nf of described transformer 13;

The unusual control circuit 15 of Figure 10, by resistance R 3, R13, R14, R15, R16, R17 and R18, capacitor C 5, C6 and C7, Zener diode Z1, diac DB1, triode Q3 and Q4 form; Described resistance R 18 can be composed in series with piezo-resistance or TVS or a plurality of conventional, electric-resistance;

Described resistance R 13 and the 5 two ends parallel connections of described capacitor C wherein an end are connected to the emitter E of described triode Q4, the other end is connected to the base stage b of described triode Q4, described resistance R 15 and the 6 two ends parallel connections of described capacitor C wherein an end are connected to the emitter E of described triode Q3, the other end is connected to the base stage b of described triode Q3, one end of described resistance R 14 is connected to the emitter E of described triode Q4, the other end of described resistance R 14 is connected to the 2. pin of described unusual control circuit 15, the base stage b of described triode Q4 is connected to the collector electrode C of described triode Q3, the base stage b of described triode Q3 is connected to the collector electrode C of described triode Q4, the emitter E of described triode Q3 is connected to the 3. pin of described unusual control circuit 15, one end of described resistance R 16 is connected to the base stage b of described triode Q3, the other end of described resistance R 16 is connected to an end of described diac, the other end of described diac is connected to the positive pole of described capacitor C 7, the negative pole of described capacitor C 7 is connected to the 3. pin of described unusual control circuit 15, the two ends of described resistance R 17 are in parallel with the two ends of described capacitor C 7, one end of described resistance R 18 is connected to the positive pole of described capacitor C 7, the other end of described resistance R 18 is connected to the 1. pin of described unusual control circuit 15, one end of described resistance R 3 is connected to the base stage b of described triode Q3, the other end of described resistance R 3 is connected to the positive pole of described Zener diode Z1, and the negative pole of described Zener diode Z1 is connected to the 4. pin of described unusual control circuit 15; Described triode Q3 and Q4 form a kind of bistable trigger-action circuit, when the current potential of the 1. pin of described unusual control circuit 15 raises, when making the voltage of described capacitor C 7 positive poles be higher than described diac DB1 by described resistance R 18, the voltage of described C7 discharges to the base stage b of described triode Q3 by described R16, make described triode Q3 conducting, because the base stage b of described triode Q4 is connected to the collector electrode C of described triode Q3, therefore also conducting of described triode Q4, again because the base stage b of described triode Q3 is connected to the collector electrode C of described triode Q4, further make all saturation conductions of triode Q3 and Q4, again because described resistance R 14 is connected emitter E and 2. between the pin of described unusual control circuit 15 of described Q4, thereby the 2. pin that makes unusual control circuit 15 is by described resistance R 14, described triode Q4 (the E-C utmost point) and Q3 (the E-C utmost point) are connected to the 3. pin (being the negative pole of described DC power supply Vin) of described unusual control circuit 15, therefore, by described pulse control circuit 11 5., (or base stage b) is connected to the negative pole of described DC power supply Vin the grid G of described switching tube 12, thereby protected described switching tube; In like manner, because the pulse voltage (Vf) of described transformer 13 winding Nf (5.-3. end) is proportional to described DC power supply voltage (Vf=Vin* (Nf/Np)), be connected to the 4. pin of described unusual control circuit 15 by the 5. end of described transformer 13, the pulse voltage that samples is added to the negative pole of described Zener diode Z1, when described DC power supply electric voltage exception raises, described Zener diode Z1 conducting, pulse current arrives the base stage b of described triode Q3 by described resistance R 3, make described triode Q3 saturation conduction, then as mentioned above, protected switching tube to avoid damaging; Can also replace the circuit of being formed by described triode Q3 and Q4, resistance R 13 capacitor C 5 with controllable silicon, it is the end (other end connection status of R14 is constant) that described silicon controlled anode A is connected to described resistance R 14, described silicon controlled negative electrode K is connected to the 3. pin of described unusual control circuit, described silicon controlled grid G is connected to the public connecting end (other end connection status of described C6/R15/R16/R3 is constant) of described C6/R15/R16/R3, obtains above-mentioned identical defencive function;

Now, in conjunction with Figure 12 device shown in Figure 1 is further elaborated.Figure 12 is the pulse control circuit part of Fig. 1;

Figure 11 circuit mainly comprises: electric current (power) level conversion 11a1, voltage level conversion 11a4, start-up circuit 11a2, accessory power supply 11a3, microcontroller 11a5 (MCU/DSP) and output driving circuit 11a6;

Described accessory power supply 11a3 is connected to the 4. pin of described pulse control 11a circuit, and output voltage V v after the rectification is carried out in the pulse of described transformer (13) Nv winding (4.-3. end) output; For described pulse control circuit 11a provides the power supply supply;

Described voltage level conversion 11a4, mate in proportion by described voltage Vv and to export microcontroller 11a5 (MCU/DSP) to, stablize described voltage Vv, the indirect voltage that works to stablize described air discharge lamp driving mechanism 1 output by described microcontroller 11a5 (MCU/DSP) (in this occasion);

Described electric current (power) level conversion 11a1, be connected to the 5. pin of described pulse control circuit 11a, electric current (or power) signal level that the outside is connected to the 5. pin of described pulse control circuit is converted to level Vf, described level Vf mates in proportion and exports microcontroller 11a5 (MCU/DSP) to, by described microcontroller 11a5 (MCU/DSP) to as: as described in being connected to the 5. pin of pulse control circuit 11a as described in the pulse of transformer (13) Nf winding output carry out output voltage V f after the rectification, mate in proportion by described voltage Vf and to export microcontroller 11a5 (MCU/DSP) to, described voltage Vf is proportional to the supply power voltage of input, play the power output of constant described air discharge lamp driving mechanism 1 and work to limit the peak power output of described air discharge lamp driving mechanism 1 according to the supply power voltage of input;

Described microcontroller 11a5 (MCU/DSP), be used for the described level Vf of input and the triangular wave of Vv and inner generation are compared, produce widened pulse, add that the outside enables control end, describedly enable the 5. pin that control end is connected to described pulse control circuit, described widened pulse is controlled and handled, export described output driving circuit 11a6 to; By outside input luminance signal to described microcontroller 11a5 (MCU/DSP), produce distinct pulse widths and (or) pulse of different frequency, feed the grid G of described switching tube 12, make described air discharge lamp driving mechanism 1 produce the high-frequency impulse of different duty (or the while also changes the frequency of pulse), the pulsewidth of change or control impuls has just been regulated the brightness of gaseous discharge lamp; The input control signal of described microcontroller 11a5 (MCU/DSP) can be (0-10V) analog quantity or pulse, also can be coded digital signal, can also be the digital signal of infrared or rf modulations;

Described start-up circuit 11a2 is connected to the 1. pin of described pulse control circuit 11a, when described accessory power supply 11a3 does not also work, gives described pulse control circuit 11a power supply, and start-up system;

Described output driving circuit 11a6 is connected to the 6. pin of described pulse control circuit 11a, to the widened pulse of described microcontroller 11a5 (MCU/DSP) output, carries out that electric current amplifies and output, drives the grid G (or base stage b) of described switching tube 12;

For the device among Fig. 1, when DC power supply Vin is connected to circuit, make described switching tube 12 conductings by described pulse control circuit, described DC power supply voltage Vin is added on the elementary winding Np, simultaneously described transformer 13 secondary winding Ns produce negative pulse voltage, promptly export the negative half period of described high-frequency ac voltage, to described resonant capacitance 14 chargings, charging current is by the negative terminal of described DC power supply Vin, through (series connection) described gaseous discharge lamp, to the described resonant capacitance 14 of connecting with it, arrive described transformer 13 secondary winding Ns (10.-6.) again, again the drain D of the switching tube 12 of process saturation conduction and the negative terminal that source S is got back to described DC power supply Vin; Simultaneously, described transformer 13 auxiliary winding Nf (3. and 5. going up) produce positive pulse voltage, by described pulse control circuit 11, further act on described switching tube 12, the control power output; When described pulse control circuit 11 is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube 12 is ended, then described transformer 13 elementary winding Np and DC power supply Vin disconnect, because the energy on the described elementary winding Np can not suddenly change, so can not be with failure of current or change direction in instantaneous, the 10. terminal potential of the secondary winding Ns of then described transformer 13 becomes positive polarity by negative polarity, the positive pulse voltage that then puts on the described gaseous discharge lamp is: the secondary winding Ns of described transformer 13 and secondary winding Np go up the positive pulse addition of producing, add described supply voltage Vin and described resonant capacitance 14 at the voltage that negative half period filled, and light gaseous discharge lamp (fluorescent tube) by described resonant capacitance 14; Simultaneously, 4. and 3. described auxiliary winding Nv goes up and produces positive pulse voltage, be added on the described pulse control circuit 11, by described pulse control circuit 11 inner rectifications, produce direct voltage Vv and be used to supply described pulse control circuit 11, simultaneously described pulse control circuit 11 is also by the described direct voltage Vv of sampling, and 10. and 6. that stablizes described primary winding Ns goes up the output voltage that produces; And under the effect of resonant capacitance, make circuit produce resonance, output high frequency quasi-sine-wave;

When switching tube 12 saturation conductions, described DC power supply voltage is added on the elementary winding Np as mentioned above, and simultaneously 10. going up to 6. end of secondary winding Ns produced negative pulse voltage and be:

Vo _NegativeThe * of=-(Ns/Np) Vin;

By gaseous discharge lamp resonant capacitance is charged, because when switching tube 12 saturation conductions, the 6. termination of described transformer 13 has been led to the negative terminal of DC power supply Vin, the voltage Vc after the stable state on the resonant capacitance is:

Vc=Vo _NegativeThe * of=-(Ns/Np) Vin;

Described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, at once on-off switching tube, then described transformer 13 elementary winding Np and described DC power supply Vin disconnect, at this moment, because the energy on the elementary winding Np of described transformer 13 can not suddenly change, thus can not be with failure of current or change direction in instantaneous, and then the production positive pulse voltage of 10. and 6. holding of secondary winding Ns is:

Vo1 _Just=(Ns/Nv) * Vv;

The production positive pulse voltage of 1. and 2. holding of the secondary winding Np of described transformer 13 is:

Vo2 _Just=(Np/Nv) * Vv;

10. the end of then described transformer 13 and the output positive pulse voltage (the positive half cycle of high frequency quasi-sine-wave) between the described DC power supply negative terminal are:

Vo _Just=Vo1 _Just+ Vo2 _Just+ Vin+Vc=((Ns+Np)/Nv) * Vv+ (1+ (Ns/Np)) * Vin;

To gaseous discharge lamp power supply, this supply current and to the magnetic core degaussing makes magnetic core work to third quadrant by the discharge of resonant capacitance; Described voltage Vv value is determined by the voltage control circuit 11.4 of pulse control circuit 11;

Above-mentioned pulse voltage makes circuit produce resonance under the effect of resonant capacitance 14, output high frequency quasi-sine-wave; The voltage that puts on the gas discharge lamp tube is:

V _Lamp=Vo/0.7072

Fig. 2 is second embodiment circuit block diagram of device of the present invention, with reference to figure 2.The drive unit 2 of gaseous discharge lamp shown in Figure 2 is used for that many gaseous discharge lamps are carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 2 has been described many groups of identical output windings that utilize single transformer, and cooperates many identical resonant capacitances to drive the application of many gas discharge lamp tubes respectively; This device 2 mainly comprises: transformer 23, resonant capacitor group 24, switching tube 22, pulse control circuit 21 and unusual control circuit 25.Drive unit 2 like this, when the input DC power supply Vin place in circuit the time, under the effect of the circuit that transformer 23, switching tube 22, pulse control circuit 21 are formed, make circuit produce resonance under the effect of resonant capacitor group 24, output high frequency quasi-sine-wave is because there is leakage inductance in transformer, and each output winding is connected to gas discharge lamp tube separately again, each winding all can produce different voltage, lights gas discharge lamp tube separately simultaneously, and gas discharge lamp is luminous; When device is in abnormality, unusual control circuit monitors when being output as zero load or overvoltage of power supply, the grid G (or base stage b) of unusual control circuit 25 output low level short circuit control switch pipes 22, device is quit work, power cutoff, after the abnormality of having got rid of device, restart power supply, resume work state of circuit.

Described transformer 23, (number of turn is: Np), secondary winding Ns becomes by W thigh and winding that (number of turn is: Ns), (number of turn is: Nf) (number of turn is auxiliary winding Nf: Nv) form with auxiliary winding Nv by elementary winding Np; Be used to produce high frequency voltage; Described transformer 23 has 10 exits: 1., 2., 3., 4., 5., 6., 7., 8., 9. and 10. hold, 1. the two ends of described elementary winding Np wherein are end of the same name on being connected respectively to 1. and 2. holding; 6. the end of described multiply (establishing W=4) secondary winding Ns all is connected to end, the other end and is connected respectively to 7., 8., 9. and 10. on the end, wherein 6. is end of the same name; 5. the two ends of described auxiliary winding Nf wherein are end of the same name on being connected respectively to 3. and 5. holding; 3. the two ends of described auxiliary winding Nv wherein are end of the same name on being connected respectively to 3. and 4. holding; The top (or terminal) that described end of the same name is a winding direction of winding unanimity; Described 1. end is connected to the anode of DC power supply Vin, described 2. end is connected to the drain D (or collector electrode c) of switching tube 22, described 3. end is connected to the negative terminal of DC power supply Vin, described 4. end is connected respectively to pulse control circuit 21 with 5. holding, 7. described, 8., 9. and 10. hold and be connected respectively to 1 of

resonant capacitor group

24,2, an end of 3 and 4,1 of described

resonant capacitor group

24,2,3 and 4 the other end is connected respectively to

gaseous discharge lamp

1,2, an end of 3 and 4, described

gaseous discharge lamp

1,2,3 and 4 the other end all is connected to the negative terminal of DC power supply Vin, and the 6. end of wherein said transformer 23 is connected to the 2. end of described transformer 23 again;

Described switching tube 22, form by drain D (or collector electrode c), grid G (or base stage b) and source S (or emitter e), wherein said drain D (or collector electrode c) is connected to the 2. end of described transformer 23, described source S (or emitter e) is connected to the negative terminal of described DC power supply Vin, described grid G (or base stage b) is connected to the 6. pin of pulse control circuit 21, and described switching tube 22 and described transformer 23 produce high-frequency ac voltage under the effect of pulse control circuit 21;

Described pulse control circuit 21 has 6 leading foots: 1., 2., 3., 4., 5. and 6. pin; Described 1. pin is connected to the positive pole of described DC power supply Vin, described 2. pin is connected to the 5. end of described transformer 23, described 3. pin is connected to the negative pole of described DC power supply Vin, described 4. pin is connected to the 4. end of described transformer 23, described 5. pin is connected to the output of unusual control circuit 25, and described 6. pin is connected to the grid G (or base stage b) of described switching tube 22; From the 4. end of described

transformer

23 and 5. end be connected respectively to 2. and the 4. signal of pin of described pulse control circuit 21, processing through pulse control circuit 21 inside, produce frequency modulation and widened pulse, go to control the grid G (or base stage b) of described switching tube 22, reach the output frequency and the power of the described gas discharge lamp drive of control (ballast);

Described

unusual control circuit

25,4 leading foots are arranged: 1., 2., 3. and 4. pin, described 1. pin is connected to described pipe 22 drain D (or collector electrode c) of opening the light, described 2. pin (for the output of unusual control circuit 25) is connected to the 5. pin of described pulse control circuit 21, described 3. pin is connected to the negative pole of described DC power supply Vin, described 4. pin is connected to the 5. end of described transformer 23, pulse voltage on the drain D (or collector electrode c) of 25 pairs of described pipes 22 that open the light of described unusual control circuit is monitored, monitor with the 5. pulse voltage of end described transformer 23, the abnormal signal that monitors is handled, and the 5. pin that sees through described pulse control circuit 21 controls and protects described switching tube 22, makes it to be in a safe condition;

Described resonant capacitor group 24:1,2,3 and 4, play stopping direct current and resonance, be connected respectively on 7., 8., the 9. and 10. end of described transformer 23, resonant capacitor group 24:1,2,3 and 4 the other end are connected respectively to an end of

gaseous discharge lamp

1,2,3 and 4, be used for the winding inductance resonance with described transformer 23, produce high frequency voltage and light gaseous discharge lamp; Described resonant capacitor group 24 also makes impulse wave become quasi-sine-wave;

Described preheat starting circuit 10 applied (about 0.4 second) preheat curent to Filament of fluorescent lamp before fluorescent lamp lighting, be used for the preheat fluorescent lamp fluorescent tube, turn-offed the preheat curent that Filament of fluorescent lamp applies after fluorescent lamp lighting; Described preheat starting circuit is to be connected on middle PCT (positive temperature coefficient) thermistor of two-stage filament, when high frequency voltage puts on described gas discharge lamp tube two ends, described voltage puts on the described PCT by the filament of two-stage, through (about 0.4 second) time PCT heating disconnection (becoming high resistant), like this, owing to having flow through heating current, filament just described gas discharge lamp tube has been carried out preheating; Described preheat starting circuit also can be cancelled (or need not): described gaseous discharge lamp fluorescent tube is equivalent to zero load before described gaseous discharge lamp fluorescent tube is unignited, because the leakage inductance of transformer can produce instantaneous high pressure, when the power designs of described instantaneous high pressure gets when enough big, make described gaseous discharge lamp fluorescent tube skip the glow discharge stage, directly arrive the arc discharge stage (be equivalent to automobile at a high speed cross the pit wheel be unsettled and cross the same), light described gaseous discharge lamp fluorescent tube, make described gaseous discharge lamp fluorescent tube reach the purpose of life-saving; In the application scenario of receiving lamp or Metal halogen lamp, described pipeline start up by preheating triggers (device) exactly and starts, and at described receive lamp or the Metal halogen lamp of trigger voltage smaller or equal to 3000V, can cancel and trigger startup, and this circuit oneself just can start;

Because the circuit theory of Fig. 2 is identical with the circuit theory of Fig. 1, can be with reference to the description of figure 1; When DC power supply Vin is connected to circuit, make described switching tube 22 conductings by described pulse control circuit 21, described DC power supply voltage Vin is added on the elementary winding Np, simultaneously described transformer 23 secondary winding Ns produce negative pulse voltage, promptly export the negative half period of described high-frequency ac voltage, respectively to 1 of described

resonant capacitance

24,2,3 and 4 chargings, charging current is divided the negative terminal of the described DC power supply Vin of four routes, respectively by described

gaseous discharge lamp

1,2,3 and 4, to 1 of the described resonant capacitance 24 of connecting with it, 2,3 and 4, arrive described transformer 23 secondary winding Ns more 7., 8., 9. and 10. hold to arrive 6. end, again the drain D of the switching tube 22 of process saturation conduction and the negative terminal that source S is got back to described DC power supply Vin; Simultaneously, described transformer 23 auxiliary winding Nf (3. and 5. going up) produce positive pulse voltage, by described pulse control circuit 21, further act on described switching tube 22, the control power output; When described pulse control circuit 21 is passing through t after the time (t is by the power control circuit 11.1 and or voltage control circuit 11.4 settings of pulse control circuit 21 inside), described switching tube 22 is ended, then described transformer 23 elementary winding Np and DC power supply Vin disconnect, because the energy on the described elementary winding Np can not suddenly change, so can not be with failure of current or change direction in instantaneous, the 10. terminal potential of the secondary winding Ns of then described transformer 23 becomes positive polarity by negative polarity, put on the described gaseous discharge lamp, the described positive pulse voltage that puts on the described gaseous discharge lamp is: the secondary winding Ns of described transformer 23 and secondary winding Np go up the positive pulse addition of producing, add described supply voltage Vin and described resonant capacitance 24 at the voltage that negative half period filled, and light gaseous discharge lamp (fluorescent tube) by described resonant capacitance 24; Simultaneously, 4. and 3. described auxiliary winding Nv goes up and produces positive pulse voltage, be added on the described pulse control circuit 21, by described pulse control circuit 21 inner rectifying and wave-filterings, produce direct voltage Vv and be used to supply described

pulse control circuit

21,10. and 6. simultaneously, pulse control circuit 21 is also by the described direct voltage Vv of sampling, and that stablizes described transformer 23 elementary winding Ns goes up the output voltage that produces; And under the effect of resonant capacitance 24, make circuit produce resonance, output high frequency quasi-sine-wave;

When switching tube 22 saturation conductions, supply voltage is added on the elementary winding Np as mentioned above, and simultaneously 10. going up to 6. end of secondary winding Ns produced negative pulse voltage and be:

Vo _NegativeThe * of=-(Ns/Np) Vin;

By gaseous discharge lamp resonant capacitance is charged, because when switching tube 22 saturation conductions, the 6. termination of described transformer 23 has been led to the negative terminal of DC power supply Vin, the voltage Vc after the stable state on the resonant capacitance is:

Vc=Vo _NegativeThe * of=-(Ns/Np) Vin;

Described pulse control circuit 21 is passing through t after the time, described switching tube 22 is ended, at once on-off switching tube 22, then described transformer 23 elementary winding Np and DC power supply Vin disconnect, at this moment, because the energy on the elementary winding Np of described transformer 23 can not suddenly change, thus can not be with failure of current or change direction in instantaneous, and then the production positive pulse voltage of 10. and 6. holding of secondary winding Ns is:

Vo1 _Just=(Ns/Nv) * Vv;

The production positive pulse voltage of 1. and 2. holding of the secondary winding Np of described transformer 23 is:

Vo2 _Just=(Np/Nv) * Vv;

10. the end of then described transformer 23 and the output positive pulse voltage (the positive half cycle of high_frequency sine wave) between the DC power supply negative terminal are:

Vo _Just=Vo1 _Just+ Vo2 _Just+ Vin+Vc=((Ns+Np)/Nv) * Vv+ (1+ (Ns/Np)) * Vin;

To gaseous discharge lamp power supply, this supply current and to the magnetic core degaussing makes magnetic core work to third quadrant by the discharge of resonant capacitance; Described voltage Vv value is determined by the voltage control circuit 11.4 of pulse control circuit 21;

Above-mentioned pulse voltage makes circuit produce resonance under the effect of resonant capacitance 24, output high frequency quasi-sine-wave; The voltage that puts on the gas discharge lamp tube is:

V _Lamp=Vo/0.7072

So circulation goes round and begins again, and produces high_frequency sine wave and is added on the gaseous discharge lamp, makes it luminous; The numerical value that changes described Np, Ns and Nv can change the voltage of output, to adapt to the gaseous discharge lamp of different parameters;

Fig. 3 is the 3rd an embodiment circuit block diagram of device of the present invention, with reference to figure 3.The drive unit 3 of gaseous discharge lamp shown in Figure 3 is used for that many gaseous discharge lamps are carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 3 has been described many groups of identical output windings that utilize two transformers, and cooperates many identical resonant capacitances to drive the application of many gas discharge lamp tubes respectively; For the device among Fig. 33, be on the basis of Fig. 2 device 2, increase an identical described transformer 33b, the multi-lamp syste of forming by elementary windings in series, the 1. end that is described transformer 33b is connected to the anode of DC power supply Vin, the 1. end of described transformer 33a is connected to the 2. end of described transformer 33b, and the 2. end of described transformer 33a is connected to the drain D (or collector electrode c) of switching tube 32; The 6. end of described transformer 33a and 33b all is connected to the drain D (or collector electrode c) of switching tube 32; 7., 8., the 9. and 10. end of described transformer 33a is connected respectively to 1,2,3 and 4 the end of resonant capacitance group 34a, 7., 8., the 9. and 10. end of described transformer 33b is connected respectively to 1,2,3 and 4 the end of resonant capacitance group 34b, transformer 33a (or 33b) 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit 31;

Other connections or structure are identical with Fig. 2 device 2; Because the circuit theory of Fig. 3 is basic identical with the circuit theory of Fig. 2, can be with reference to the description of figure 2;

Fig. 4 is the 4th an embodiment circuit block diagram of device of the present invention, with reference to figure 4.The drive unit 4 of gaseous discharge lamp shown in Figure 4 is used for that gaseous discharge lamp is carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 4 has been described the application that utilizes the synthetic gas discharge lamp pipe of two transformers; For the device among Fig. 44, be on the basis of Fig. 1 device 1, increase an identical described transformer 43b, the system that forms by elementary windings in series, the 1. end that is described transformer 43b is connected to the anode of DC power supply Vin, the 1. end of described transformer 43a is connected to the 2. end of described transformer 43b, and the 2. end of described transformer 43a is connected to the drain D (or collector electrode c) of switching tube 42; The 6. end that 10. is connected to described transformer 43b of described transformer 43a, the 6. end of described transformer 43a is connected to the drain D (or collector electrode c) of switching tube 42; The 10. end of described transformer 43b is connected to an end of resonant capacitance 44, transformer 43a (or 43b) 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit 41;

Other connections or structure are identical with Fig. 1 device 1; Because the circuit theory of Fig. 4 is identical with the circuit theory of Fig. 1, can be with reference to the description of figure 1;

Fig. 5 is the 5th an embodiment circuit block diagram of device of the present invention, with reference to figure 5.The drive unit 5 of gaseous discharge lamp shown in Figure 5 is used for that gaseous discharge lamp is carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 5 has been described and has been utilized two transformers connected in parallel to drive the application of two gas discharge lamp tubes respectively; For the device among Fig. 55, be on the basis of Fig. 1 device 1, increase an identical described transformer 53b, the system that composes in parallel by elementary winding (by diode in series separately), the 1. end that is described transformer 53a and 53b all is connected to the anode of DC power supply Vin, described transformer 53a end 2. is connected to the drain D (or collector electrode c) of switching tube 52 by diode a, and described transformer 53b end 2. is connected to the drain D (or collector electrode c) of switching tube 52 by diode b; The drain D that 6. all is connected to switching tube 52 (or collector electrode c) of described transformer 53a and 53b, the 10. end of described transformer 53a is connected to the end of resonant capacitance 54a; The 10. end of described transformer 53b is connected to the end of resonant capacitance 54b, described transformer 53a (or 53b) 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit 51;

Other connections or structure are identical with Fig. 1 device 1; Because the circuit theory of Fig. 5 is identical with the circuit theory of Fig. 1, can be with reference to the description of figure 1;

Fig. 6 is the 6th an embodiment circuit block diagram of device of the present invention, with reference to figure 6.The drive unit 6 of gaseous discharge lamp shown in Figure 6 is used for that gaseous discharge lamp is carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 6 has been described the application of single gas discharge lamp tube of single transformer driving; For the device among Fig. 66, be on the basis of Fig. 1 device 1, increase current sampling circuit 66, described current sampling circuit 66 seals in described gaseous discharge lamp between the negative terminal of described DC power supply Vin, electric current to described gaseous discharge lamp is taken a sample, and be described gaseous discharge lamp current conversion voltage, sampling value is delivered to the 2. pin of described pulse control circuit 61 and the 4. pin of described unusual control circuit 65, the electric current of 61 pairs of described samplings of described pulse control circuit is controlled (or restriction), makes power output keep substantially constant; Simultaneously, cancel the winding Nf (5.-3. end) of described transformer 63; Described current sampling circuit 66 is made of resistance, flows through the electric current of described resistance, produces voltage at the two ends of described resistance;

Other connections or structure are identical with Fig. 1 device 1; Because the circuit theory of Fig. 6 is basic identical with the circuit theory of Fig. 1, can be with reference to the description of figure 1;

Fig. 7 is the 7th an embodiment circuit block diagram of device of the present invention, with reference to figure 7.The drive unit 7 of gaseous discharge lamp shown in Figure 7 is used for that gaseous discharge lamp is carried out high-frequency ac and drives, and makes it luminous, and its high-frequency ac driving process adopts single resonant circuit; Gaseous discharge lamp is driven, there are not other dual switch circuit (half-bridge circuit) to have the problem of two resonance frequencys, power control circuit can make power output stable under wide voltage, has also avoided magnetic core saturated simultaneously, thereby the life-span of circuit is greatly improved; This device 7 has been described the application of single gas discharge lamp tube of single transformer driving; For the device among Fig. 77, be on the basis of Fig. 1 device 1, increase current sampling circuit 76, described current sampling circuit 76 seals in the source S (or emitter e) of described switching tube 72 between the negative terminal of described DC power supply Vin, source S (or emitter e) electric current to described switching tube 72 is taken a sample, and be the source S of described switching tube 72 (or emitter e) current conversion voltage, sampling value is delivered to the 2. pin of described pulse control circuit 71 and the 4. pin of described unusual control circuit 75, the electric current of 71 pairs of described samplings of described pulse control circuit is controlled (or restriction), makes peak power output keep substantially constant; Simultaneously, cancel the winding Nf (5.-3. end) of described transformer 73; Described current sampling circuit 76 is made of resistance, flows through the electric current of described resistance, produces voltage at the two ends of described resistance;

Other connections or structure are identical with Fig. 1 device 1; Because the circuit theory of Fig. 7 is basic identical with the circuit theory of Fig. 1, can be with reference to the description of figure 1;

Fig. 8 is first embodiment circuit block diagram of Fig. 1 band Active PFC; With reference to figure 8.Being input as the occasion of Alternating Current Power Supply, in the resistance load, because the existence of reactance, AC power need provide bigger electric current could obtain certain power in load.Some energy is stored in earlier in the reactance in a period of time in a sinusoidal period, later on another section in the period this part energy feed back to power supply from reactance again.This part energy does not consume in load, so be called reactive power.Power factor correction circuit will make described reactive power as much as possible little exactly, makes power factor (PF) be as far as possible: 1.In order to achieve the above object, cooperate Fig. 1 to Fig. 7 in the application scenario that is input as Alternating Current Power Supply, now in conjunction with the device 8 of Fig. 1 with reference to figure 8, increase rectifier bridge 83, filter capacitor (4) 87 and Passive Power factor correcting circuit part, be used to replace above-mentioned DC power supply Vin, directly give device 1 power supply;

Described rectifier bridge 83 inside are made up of four rectifier diodes, are used for the ac voltage rectifier of input is become pulsed dc voltage;

Described filter capacitor (4) 87 replaces the position of above-mentioned DC power supply Vin, be used for described pulsed dc voltage smoothing, described filter capacitor (4) 87 both positive and negative polarities are corresponding with the both positive and negative polarity position of described DC power supply Vin, and the voltage on the described filter capacitor (4) 87 is described Vin;

Described Passive Power factor correcting circuit comprises: the high frequency pump that fast diode (2) 86 and electric capacity (3) 85 are formed, inductance (1) 82 and (2) 88, electric capacity (1) 81 and (2) 84 high-frequency circuits of forming, be used to make the alternating current of input continuous, improve the power factor (PF) of circuit and the total harmonic distortion of reduction alternating current;

The negative pole of described diode (2) 86 is connected to the positive pole of described filter capacitor (4) 87, the positive pole of described diode (2) 86 is connected to the positive pole of described rectifier bridge 83, the negative pole of described filter capacitor (4) 87 is connected to the negative pole of described rectifier bridge 83, and the other end of described gaseous discharge lamp (being connected to that end of described DC power supply Vin negative pole originally) is connected to the positive pole of described rectifier bridge 83; One end of described electric capacity (3) 85, be connected to the positive pole of described diode (2) 86, the other end of described electric capacity (3) 85 is connected to the drain D (or collector electrode C) of described switching tube 12, the two ends of described electric capacity (2) 84 are connected respectively to the both positive and negative polarity of described rectifier bridge 83, two ac input ends of described rectifier bridge 83 are connected respectively to an end of described inductance (1) 82 and (2) 88, and the described inductance (1) 82 and (2) 88 the other end are connected respectively to the two ends of described electric capacity (1) 81; The N of AC power and L line are connected respectively to the two ends of described electric capacity (1) 81;

Like this, be connected to the two ends of described electric capacity (1) 81 when AC power after, just from the positive and negative terminal output dc voltage Vin of described filter capacitor (4) 87, simultaneously, the 10. end output high voltage of the secondary winding Ns of described transformer 13, when the output high voltage negative half period, the 10. end output negative voltage of the secondary winding Ns of described transformer 13, described negative voltage is connected to the positive pole of described rectifier bridge 83 by described resonant capacitance 14 and described gas discharge lamp tube, the alternating current of input by described rectifier bridge 83, described gaseous discharge lamp to described resonant capacitance 14 chargings; When the positive half cycle of output high voltage, the 10. end output positive voltage of the secondary winding Ns of described transformer 13, this positive voltage adds voltage on the above resonant capacitance 14 (voltage that is recharged at negative half period) by described gaseous discharge lamp and (2) 86 pairs of described filter capacitors (4) 87 chargings of diode, because the very big charging voltage of described filter capacitor (4) 87 capacity (resonant capacitance 14 relatively) rises seldom, simultaneously, at the instantaneous value of AC supply voltage during less than the voltage at described electric capacity (4) 87 two ends, rectifier bridge passes through no current, be that described inductance (1) 82 and (2) 88 passes through no current, because inductive current can not suddenly change, again because the capacity of described electric capacity (1) 81 is bigger, an end (promptly being connected to the N of AC power and that end of L) that high-frequency current is equivalent to described inductance (1) 82 and (2) 88 links together, described inductance (1) 82 will be distinguished with (2) 88 the other end and charge by 83 pairs of described electric capacity (2) 84 of rectifier bridge, keep rectifier bridge 83 to be in conducting state, also promptly kept the continuous of alternating current; When the high frequency voltage negative half period, (2) 84 pairs of discharges such as described gaseous discharge lamp of described electric capacity; Described electric capacity (3) 85 is mainly used in EMI (electromagnetic interference) that reduces circuit and the power factor (PF) that further improves device;

Fig. 9 is second embodiment circuit block diagram of Fig. 1 band Active PFC; With reference to figure 9.Being input as the occasion of Alternating Current Power Supply, in the resistance load, because the existence of reactance, AC power need provide bigger electric current could obtain certain power in load.Some energy is stored in earlier in the reactance in a period of time in a sinusoidal period, later on another section in the period this part energy feed back to power supply from reactance again.This part energy does not consume in load, so be called reactive power.Power factor correction circuit will make described reactive power as much as possible little exactly, makes power factor (PF) be as far as possible: 1.In order to achieve the above object, cooperate Fig. 1 to Fig. 7 in the application scenario that is input as Alternating Current Power Supply,, increase passive power factor corrective 9 and brightness adjustment control 99 circuit parts now in conjunction with the device 9 of Fig. 1 with reference to figure 9, the brightness that is used to replace above-mentioned DC power supply Vin and regulates described gaseous discharge lamp; Described passive power factor corrective circuit 9 has the adjustable output voltage function, control the size of the output voltage V in of described passive power factor corrective circuit 9 by described adjusting control circuit 99, change the power output of described air discharge lamp driving mechanism (ballast) 1, thereby realized light modulation; The input control signal of described adjusting control circuit 99 can be (0-10V) analog quantity or pulse, also can be coded digital signal, can also be the digital signal of infrared or rf modulations;

Described passive power factor corrective circuit 9 comprises: rectifier bridge 93, inductive transformer 92, L6561/L6562 (91), field effect transistor Q1, diode D1, resistance R 1/R2/R3/R4/R15/R16 and capacitor C 1/C2/C3/C4/C6, and constituting output voltage V in is the adjustable dc voltage source of 50-200V scope;

The input of described rectifier bridge 93 is connected respectively on the N and L line of AC power, output is connected respectively to the two ends of described

capacitor C

6,1. the pin of described inductive transformer 92 is connected to the positive pole of described

rectifier bridge

93,3. pin is connected to the drain D of described field effect transistor Q1,4. and 9. pin is connected to the negative pole of described

rectifier bridge

93,5. pin is connected to the 5. pin of described L6561/L6562 (91) by described resistance R 3, (12) pin is connected to the positive pole of described diode D1, the negative pole of described diode D1 is connected to the positive pole of described capacitor C 4, the negative pole of described capacitor C 4 is connected to the negative pole of described rectifier bridge 93, the source S of described field effect transistor Q1 is connected to the negative pole of described rectifier bridge 93 by described resistance R 15, the grid G of described field effect transistor Q1 is connected to the 7. pin of described L6561/L6562 (91) by described resistance R 4, the 4. pin of described L6561/L6562 (91) is connected to the source S of described field effect transistor Q1,6. pin is connected to the negative pole of described rectifier bridge, 8. pin is connected on the anodal VCC of accessory power supply, also be connected to simultaneously the positive pole of described

capacitor C

3,3. pin is connected to the public connecting end of R1 and R2, the other end of described resistance R 1 is connected to the positive pole of described rectifier bridge 93, the other end of described resistance R 2 is connected to the negative pole of described rectifier bridge 93, the negative pole of described capacitor C 3 is connected to the negative pole of described rectifier bridge 93, the 3. pin of the two ends difference described L6561/L6562 of link (91) of described capacitor C 1 and the negative pole of described rectifier bridge 93, the two ends of described capacitor C 2 are 1. pin and the 2. pin of the described L6561/L6562 of link (91) respectively, one end of described resistance R 16 is connected to the positive pole of described rectifier bridge 93, and the other end is connected to the positive pole of described capacitor C 3;

Described adjusting control circuit comprises: CD4051 (94), microcontroller MCU/DSP (95), diode D2, resistance R 5/R6/R7/R8/R9/R10/R11/R12/R13/R14 and capacitor C 5, constitute program-controlled potentiometer, the direct voltage of described C4 being gone up output carries out the dividing potential drop sampling, the voltage of sampling is delivered to the 1. pin of described L6561/L6562 (91), make the direct voltage of output controlled, promptly control described CD4051 (94) and connect certain divider resistance by described microcontroller MCU/DSP (95), obtain a certain partial pressure value and deliver to the 1. pin of described L6561/L6562 (91), thereby the described voltage Vin that finishes certain value of control exports;

The positive pole of described diode D2 is connected to the 4. end of the transformer 13 of described air discharge lamp driving mechanism, the negative pole of described diode D2 is connected to the positive pole of described capacitor C 5 by described resistance R 14, also be connected to simultaneously the positive pole of described accessory power supply VCC and (16) pin of described CD4051 (94), the negative pole of described capacitor C 5 is connected to the negative pole of described rectifier bridge 93, described CD4051 (94) 9., 10. be connected respectively on the described microcontroller MCU/DSP (95) with (11) pin, 6., 7. and 8. pin all is connected to the negative pole of described

rectifier bridge

93,3. pin is connected to the 1. pin of described passive power factor corrective 9 circuit L6561/L6562 (91), 4. pin is connected to the public connecting end of described resistance R 5 and R6,2. pin is connected to the public connecting end of described resistance R 6 and R7,5. pin is connected to the public connecting end of described resistance R 7 and R8,1. pin is connected to the public connecting end of described resistance R 8 and R9, (12) pin is connected to the public connecting end of described resistance R 9 and R10, (15) pin is connected to the public connecting end of described resistance R 10 and R11, (14) pin is connected to the public connecting end of described resistance R 11 and R12, (13) pin is connected to the public connecting end of described resistance R 12 and R13, the other end of wherein said resistance R 5 is connected to the negative pole of described rectifier bridge 93, and the other end of described resistance R 13 is connected to the positive pole of described capacitor C 4;

When AC power (N and L) inserts described rectifier bridge,, directly give device 1 power supply just from the both positive and negative polarity output dc voltage Vin of described capacitor C 4.

Again owing to increased intednsity circuit, it is bright entirely that the brightness of gaseous discharge lamp (fluorescent lamp) is transferred to from not working always, is fit to people's needs more.

Claims

1. the drive unit of a gaseous discharge lamp comprises:

When DC power supply Vin is connected to circuit, make described switching tube conducting by described pulse control circuit, described DC power supply voltage Vin is added on the elementary winding Np, simultaneously described transformer secondary output winding Ns produces negative pulse voltage, promptly export the negative half period of described high-frequency ac voltage, to described resonant capacitance charging, charging current is by the negative terminal of described DC power supply Vin, through (series connection) described gaseous discharge lamp, to the described resonant capacitance of connecting with it, arrive described transformer secondary output winding Ns (10.-6.) again, again the drain D of the switching tube of process saturation conduction and the negative terminal that source S is got back to described DC power supply Vin; Simultaneously, the auxiliary winding Nf (3. and 5. going up) of described transformer produces positive pulse voltage, by described pulse control circuit, further acts on described switching tube, the control power output; When described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, then described primary winding Np and DC power supply Vin disconnect, because the energy on the described elementary winding Np can not suddenly change, so can not be with failure of current or change direction in instantaneous, then the 10. terminal potential of described Secondary winding of transformer Ns becomes positive polarity by negative polarity, the positive pulse voltage that then puts on the described gaseous discharge lamp is: described Secondary winding of transformer Ns and secondary winding Np go up the positive pulse addition of producing, add described supply voltage Vin and described resonant capacitance at the voltage that negative half period filled, and light gaseous discharge lamp (fluorescent tube) by described resonant capacitance; Simultaneously, 4. and 3. described auxiliary winding Nv goes up and produces positive pulse voltage, be added on the described pulse control circuit, by the inner rectification of described pulse control circuit, produce direct voltage Vv and be used to supply described pulse control circuit, simultaneously pulse control circuit is also by the described direct voltage Vv of sampling, and 10. and 6. that stablizes described primary winding Ns goes up the output voltage that produces; And under the effect of resonant capacitance, make circuit produce resonance, output high frequency quasi-sine-wave;

Vo _NegativeThe * of=-(Ns/Np) Vin;

Vc=Vo _NegativeThe * of=-(Ns/Np) Vin;

Vo1 _Just=(Ns/Nv) * Vv;

Vo2 _Just=(Np/Nv) * Vv;

Vo _Just=Vo1 _Just+ Vo2 _Just+ Vin+Vc=((Ns+Np)/Nv) * Vv+ (1+ (Ns/Np)) * Vn;

V _Lamp=Vo/0.7072

So circulation goes round and begins again, and produces high_frequency sine wave and is added on the gaseous discharge lamp, makes it luminous; The numerical value that changes Np, Ns and Nv can change the voltage of output, to adapt to the gaseous discharge lamp of different parameters.

2. the drive unit of a gaseous discharge lamp comprises:

1. the end of described transformer is connected to the anode of DC power supply Vin, and described Vin is a supply voltage; 2. the end of described transformer is connected to the drain D (or collector electrode c) of switching tube, 3. the end of described transformer is connected to the negative terminal of DC power supply Vin, 4. the end of described transformer and 5. end be connected respectively to pulse control circuit, described transformer 7., 8., 9. and 10. hold and be connected respectively to resonant capacitance 1,2, an end of 3 and 4, described resonant capacitance 1,2,3 and 4 the other end is connected respectively to gaseous discharge lamp 1,2, an end of 3 and 4, described gaseous discharge lamp 1,2,3 and 4 the other end all is connected to the negative terminal of DC power supply Vin, and the 6. end of wherein said transformer is connected to the 2. end of described transformer again;

Resonant capacitance 1,2,3 and 4, play stopping direct current and resonance, being connected respectively to described transformer 7., 8., 9. and 10. holds, the resonant capacitance 1,2,3 and 4 the other end are connected respectively to an end of gaseous discharge lamp 1,2,3 and 4, be used for the winding inductance resonance with described transformer, produce high frequency voltage and light gaseous discharge lamp; Described resonant capacitance also makes impulse wave become quasi-sine-wave;

When DC power supply Vin is connected to circuit, make described switching tube conducting by described pulse control circuit, described DC power supply voltage Vin is added on the elementary winding Np, simultaneously described transformer secondary output winding Ns produces negative pulse voltage, promptly export the negative half period of described high-frequency ac voltage, respectively to described resonant capacitance 1,2,3 and 4 chargings, charging current is divided the negative terminal of the described DC power supply Vin of four routes, respectively by described gaseous discharge lamp 1,2,3 and 4, to the described resonant capacitance 1 of connecting with it, 2,3 and 4, arrive described transformer secondary output winding Ns more 7., 8., 9. and 10. hold to arrive 6. end, again the drain D of the switching tube of process saturation conduction and the negative terminal that source S is got back to described DC power supply Vin; Simultaneously, the auxiliary winding Nf (3. and 5. going up) of described transformer produces positive pulse voltage, by described pulse control circuit, further acts on described switching tube, the control power output; When described pulse control circuit is passing through t after the time (t is by the power control circuit and or the voltage control circuit setting of pulse control circuit inside), described switching tube is ended, then described primary winding Np and DC power supply Vin disconnect, because the energy on the described elementary winding Np can not suddenly change, so can not be with failure of current or change direction in instantaneous, then the 10. terminal potential of described Secondary winding of transformer Ns becomes positive polarity by negative polarity, put on the described gaseous discharge lamp, the described positive pulse voltage that puts on the described gaseous discharge lamp is: described Secondary winding of transformer Ns and secondary winding Np go up the positive pulse addition of producing, add described supply voltage Vin and described resonant capacitance at the voltage that negative half period filled, and light gaseous discharge lamp (fluorescent tube) by described resonant capacitance; Simultaneously, 4. and 3. described auxiliary winding Nv goes up and produces positive pulse voltage, be added on the described pulse control circuit, by the inner rectifying and wave-filtering of described pulse control circuit, produce direct voltage Vv and be used to supply described pulse control circuit, 10. and 6. simultaneously, pulse control circuit is also by the described direct voltage Vv of sampling, and that stablizes described primary winding Ns goes up the output voltage that produces; And under the effect of resonant capacitance, make circuit produce resonance, output high frequency quasi-sine-wave;

Vo _NegativeThe * of=-(Ns/Np) Vin;

Vc=Vo _NegativeThe * of=-(Ns/Np) Vin;

Vo1 _Just=(Ns/Nv) * Vv;

Vo2 _Just=(Np/Nv) * Vv;

Vo _Just=Vo1 _Just+ Vo2 _Just+ Vin+Vc=((Ns+Np)/Nv) * Vv+ (1+ (Ns/Np)) * Vin;

V _Lamp=Vo/0.7072

3. one kind based on claim 1 or 2 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, it is characterized in that comprising: two identical described transformers 1 and 2;

It is characterized in that: described transformer 1 and 2, the multi-lamp syste that is composed in series by elementary winding Np1 and Np2;

1. the end of described transformer 2 is connected to the anode of DC power supply Vin, and the 1. end of described transformer 1 is connected to the 2. end of described transformer 2, and the 2. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; Described transformer 1 and 2 6. end all are connected to the drain D (or collector electrode c) of switching tube; Described transformer 1 and 2 10. end are connected respectively to an end (or 7., 8., 9. and 10. end is connected respectively to an end of resonant capacitance 1,2,3 and 4) of described resonant capacitance separately, transformer 2 or 1 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit; Other connections or structure remain unchanged;

Its feature also is: described transformer 1 and 2, the system that is composed in series respectively by primary and secondary winding Np2 and Np1, Ns2 and Ns1;

1. the end of described transformer 2 is connected to the anode of DC power supply Vin, and the 1. end of described transformer 1 is connected to the 2. end of described transformer 2, and the 2. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; 8. the end of described transformer 1 is connected to the 6. end of described transformer 2, and the 6. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; 10. the end of described transformer 2 is connected to an end of described resonant capacitance, transformer 2 or 1 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit; Other connections or structure remain unchanged;

Its feature also is: described transformer 1 and 2, the multi-lamp syste that is composed in parallel behind series diode a and the b respectively by elementary winding Np1 and Np2;

Described transformer 1 and 2 1. end all are connected to the anode of DC power supply Vin, 2. the end of described transformer 1 is connected to the positive pole of described diode a, 2. the end of described transformer 2 is connected to the positive pole of described diode b, and the negative pole of described diode a and b all is connected to the drain D of switching tube (or collector electrode c); 10. the end of described transformer 1 is connected to the 6. end of described transformer 2, and the 6. end of described transformer 1 is connected to the drain D (or collector electrode c) of switching tube; Described transformer 1 and 2 10. end are connected respectively to an end of described resonant capacitance separately, transformer 2 or 1 3. 4. 5. end be connected respectively to the 3. 4. 2. pin of described pulse control circuit; Other connections or structure remain unchanged.

4. one kind based on claim 1 or 2 or 3 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, it is characterized in that also comprising: current sampling circuit; Be used for control output (maximum) power, also be used for protective circuit simultaneously and avoid damaging;

Described current sampling circuit is made of resistance, flows through the electric current of described resistance, produces voltage at the two ends of described resistance.

5. one kind based on claim 1 or 2 or 3 or 4 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, be input as the occasion of Alternating Current Power Supply, it is characterized in that also comprising: rectification, filtering and Passive Power factor correcting circuit are used to replace above-mentioned DC power supply Vin:

Described Passive Power factor correcting circuit comprises: the high frequency pump that fast diode 2 and electric capacity 3 are formed, inductance 1 and 2, electric capacity 1 and 2 high-frequency circuits of forming, be used to make the alternating current of input continuous, improve the power factor (PF) of circuit and the total harmonic distortion of reduction alternating current;

The negative pole of described diode 2 is connected to the positive pole of described filter capacitor 4, the positive pole of described diode 2 is connected to the positive pole of described rectifier bridge, the negative pole of described filter capacitor 4 is connected to the negative pole of described rectifier bridge, and the other end of described gaseous discharge lamp (being connected to that end of described DC power supply Vin negative pole originally) is connected to the positive pole of described rectifier bridge; One end of described electric capacity 3, be connected to the positive pole of described diode 2, the other end of described electric capacity 3 is connected to the drain D (or collector electrode C) of described switching tube, the two ends of described electric capacity 2 are connected respectively to the both positive and negative polarity of described rectifier bridge, two ac input ends of described rectifier bridge are connected respectively to an end of described inductance 1 and 2, and the described inductance 1 and 2 the other end are connected respectively to the two ends of described electric capacity 1; The N of AC power and L line are connected respectively to the two ends of described electric capacity 1;

Like this, be connected to the two ends of described electric capacity 1 when AC power after, just from the positive and negative terminal output dc voltage Vin of described filter capacitor 4, simultaneously, the 10. end of described Secondary winding of transformer Ns (or 7., 8., 9. and 10. hold) output high voltage, when the output high voltage negative half period, the 10. end of described Secondary winding of transformer Ns (or 7., 8., 9. and 10. hold) the output negative voltage, described negative voltage is connected to the positive pole of described rectifier bridge by described resonant capacitance and described gas discharge lamp tube, and the alternating current of input is by described rectifier bridge, described gaseous discharge lamp is to described resonant capacitance (or resonant capacitance 1,2,3 and 4) charging; When the positive half cycle of output high voltage, the 10. end of described Secondary winding of transformer Ns (or 7., 8., 9. and 10. hold) the output positive voltage, this positive voltage adds the above resonant capacitance (or resonant capacitance 1,2,3 and 4) voltage on (voltage that is recharged at negative half period) is by described gaseous discharge lamp and 2 pairs of described filter capacitors 4 chargings of diode, because the very big charging voltage of described filter capacitor 4 capacity (resonant capacitance relatively) rises seldom, simultaneously, at the instantaneous value of AC supply voltage during less than the voltage at described electric capacity 4 two ends, rectifier bridge passes through no current, be that described inductance 1 and 2 passes through no current, because inductive current can not suddenly change, again because the capacity of described electric capacity 1 is bigger, an end (promptly being connected to the N of AC power and that end of L) that high-frequency current is equivalent to described inductance 1 and 2 links together, the described inductance 1 and 2 the other end will distinguish and by rectifier bridge to described electric capacity 2 chargings, keep rectifier bridge to be in conducting state, also promptly kept the continuous of alternating current; When the high frequency voltage negative half period, 2 pairs of discharges such as described gaseous discharge lamp of described electric capacity; Described electric capacity 3 is mainly used in EMI (electromagnetic interference) that reduces circuit and the power factor (PF) that further improves device.

6. one kind based on claim 1 or 2 or 3 or 4 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, be input as the occasion of Alternating Current Power Supply, it is characterized in that also comprising: passive power factor corrective circuit and brightness adjustment control, the brightness that is used to replace above-mentioned DC power supply Vin and regulates described gaseous discharge lamp; Described passive power factor corrective circuit has the adjustable output voltage function, control the size of the output voltage V in of described passive power factor corrective circuit by described adjusting control circuit, change the power output of described air discharge lamp driving mechanism (ballast), thereby realized light modulation; Its feature is that also the input control signal of described adjusting control circuit can be (0-10V) analog quantity or pulse, also can be coded digital signal, can also be the digital signal of infrared or rf modulations;

Described passive power factor corrective circuit comprises: rectifier bridge, inductive transformer, L6561/L6562, field effect transistor Q1, diode D1, resistance R 1/R2/R3/R4/R15/R16 and capacitor C 1/C2/C3/C4/C6, and constituting output voltage V in is the adjustable dc voltage source of 40-200V scope;

The input of described rectifier bridge is connected respectively on the N and L line of AC power, output is connected respectively to the two ends of described capacitor C 6,1. the pin of described inductive transformer is connected to the positive pole of described rectifier bridge, 3. pin is connected to the drain D of described field effect transistor Q1,4. and 9. pin is connected to the negative pole of described rectifier bridge, 5. pin is connected to the 5. pin of described L6561/L6562 by described resistance R 3, (12) pin is connected to the positive pole of described diode D1, the negative pole of described diode D1 is connected to the positive pole of described capacitor C 4, the negative pole of described capacitor C 4 is connected to the negative pole of described rectifier bridge, the source S of described field effect transistor Q1 is connected to the negative pole of described rectifier bridge by described resistance R 15, the grid G of described field effect transistor Q1 is connected to the 7. pin of described L6561/L6562 by described resistance R 4, the 4. pin of described L6561/L6562 is connected to the source S of described field effect transistor Q1,6. pin is connected to the negative pole of described rectifier bridge, 8. pin is connected on the anodal VCC of accessory power supply, also be connected to simultaneously the positive pole of described capacitor C 3,3. pin is connected to the public connecting end of R1 and R2, the other end of described resistance R 1 is connected to the positive pole of described rectifier bridge, the other end of described resistance R 2 is connected to the negative pole of described rectifier bridge, the negative pole of described capacitor C 3 is connected to the negative pole of described rectifier bridge, the 3. pin of the described L6561/L6562 of two ends difference link of described capacitor C 1 and the negative pole of described rectifier bridge, the two ends of described capacitor C 2 are 1. pin and the 2. pin of the described L6561/L6562 of link respectively, one end of described resistance R 16 is connected to the positive pole of described rectifier bridge, and the other end is connected to the positive pole of described capacitor C 3;

When AC power (N and L) inserts described rectifier bridge, just from the both positive and negative polarity output dc voltage Vin of described capacitor C 4.

7. one kind based on claim 1 or 2 or 3 or 4 or 5 or 6 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, it is characterized in that described unusual control circuit comprises: resistance R 3, R13, R14, R15, R16, R17 and R18, capacitor C 5, C6 and C7, Zener diode Z1, diac DB1, triode Q3 and Q4; Described resistance R 18 can be composed in series with piezo-resistance or TVS or a plurality of conventional, electric-resistance;

Can also replace the circuit of being formed by described triode Q3 and Q4, resistance R 13 capacitor C 5 with controllable silicon; it is the end (other end connection status of R14 is constant) that described silicon controlled anode A is connected to described resistance R 14; described silicon controlled negative electrode K is connected to the 3. pin of described unusual control circuit; described silicon controlled grid G is connected to the common port (other end connection status of described C6/R15/R16/R3 is constant) of described C6/R15/R16/R3, obtains above-mentioned identical defencive function.

8. one kind based on claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, it is characterized in that described pulse control circuit also comprises: power control circuit, regenerative circuit, voltage control circuit and biasing circuit;

Described resistance R 6 is used to prevent the switching tube parasitic oscillation; described resistance R 1 is used for providing the start bias voltage to described switching tube; according to different supply power voltages; described resistance R 1 can be composed in series (improving the withstand voltage of resistance) by a plurality of resistance; described diode D1 is used for improving the efficient of this device; when selecting with ambipolar transistor, described switching tube to replace described diode D1 with short-circuit line (lead); described resistance R 7 is used for providing the stable state bias voltage to described switching tube; described Zener diode Z3 is used for providing gate protection to described switching tube, path is provided for simultaneously the negative pulse of the winding Nf of described transformer.

9. one kind based on claim 1 or 2 or 3 or 5 or 6 or 7 described air discharge lamp driving mechanism (ballast) and power factor correction circuits thereof, it is characterized in that, described pulse control circuit also comprises: accessory power supply, voltage level conversion, electric current (power) level conversion, microcontroller (MCU/DSP), start-up circuit and output driving circuit;

Described accessory power supply is connected to the 4. pin of described pulse control circuit, and output voltage V v after the rectification is carried out in the pulse of described transformer Nv winding (4.-3. end) output; For described pulse control circuit provides the power supply supply;

Described output driving circuit is connected to the 6. pin of described pulse control circuit, to the widened pulse of described microcontroller (MCU/DSP) output, carries out that electric current amplifies and output, drives the grid G (or base stage b) of described switching tube.

10. one kind based on described air discharge lamp driving mechanism of claim 9 (ballast) and power factor correction circuit thereof, it is characterized in that described pulse control circuit also comprises: intednsity circuit, be used to control or the luminosity of adjustments of gas discharge lamp, described intednsity circuit comprises: microcontroller (MCU/DSP), by outside input luminance signal to described microcontroller (MCU/DSP), produce distinct pulse widths and (or) pulse of different frequency, feed the grid G of described switching tube, make described air discharge lamp driving mechanism produce the high-frequency impulse (or the while also changes the frequency of pulse) of different duty, the pulsewidth of change or control impuls has just been regulated the brightness of gaseous discharge lamp; Its feature is that also the input control signal of described microcontroller (MCU/DSP) can be (0-10V) analog quantity or pulse, also can be coded digital signal, can also be the digital signal of infrared or rf modulations.