CN106132053A - The control circuit of high-voltage gas discharging light, control method and drive circuit - Google Patents
The control circuit of high-voltage gas discharging light, control method and drive circuit Download PDFInfo
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- CN106132053A CN106132053A CN201610586989.8A CN201610586989A CN106132053A CN 106132053 A CN106132053 A CN 106132053A CN 201610586989 A CN201610586989 A CN 201610586989A CN 106132053 A CN106132053 A CN 106132053A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The present invention provides the control circuit of high-voltage gas discharging light, control method and drive circuit.Described control circuit includes: the first switch drive module, for providing the first switch controlling signal for the first switching tube in main circuit；Second switch drives module, for providing second switch control signal and the 3rd switch controlling signal for the multiple second switch pipes in full bridge driving circuit；Status control module, wherein, second switch described in described state controlling module controls drives module, make in the lighting stage, described second switch drives module to control the conducting state of the plurality of second switch pipe to provide unidirectional current path, startup stage in, described second switch drive module control the plurality of second switch pipe conducting state to provide bidirectional current path.This control circuit provides different driving method in different phase, such that it is able to maintain the brightness stability of high-voltage gas discharging light, increase the service life.
Description
Technical field
The invention belongs to electronic technology field, relate more specifically to the control circuit of high-voltage gas discharging light, control method
And drive circuit.
Background technology
High-pressure discharge (HID) lamp utilize noble gas electrion phenomenon in glass tubing luminous and as light source.
HID lamp is typically made up of bulb, switching discharge tube D4 and stabilizer.During at switching discharge tube D4 two ends plus sufficiently high voltage
Can be punctured, moment produces high voltage, and the gas in bulb discharges generation arclight under high voltages, thus realizes shining
Bright function.Stabilizer is also known as the driving controller of ballast, i.e. HID lamp, for controlling the startup of HID lamp, working, protect shutoff
Etc. each side function.HID lamp has the high advantage with life-span length of brightness, is widely used in lighting device for vehicle.
The start-up course of HID lamp is complex, and fluorescent tube to experience the process of a preheating upon actuation just can make brightness, electricity
Pressure reaches stable.Ballast should ensure that it can successfully light HID lamp, and rapidly pre-warming.
The most common HID lamp drives controller to use electric ballast, such as DC-DC converter.Inverse-excitation type DC-DC becomes
Parallel operation has that volume is little, low cost and other advantages, being most widely used of switch power controller field.But, in HID lamp
Control circuit use this type of topological structure there is following challenge.
Inverse-excitation type DC-DC converter is generally constant voltage output or constant current output.Owing to the impedance operator of HID lamp is more special
Very, affected by factors such as ambient temperatures, and random error is very big, be all likely to result under different temperatures, different on-off times
Modulating voltage is variant, and therefore under constant voltage or electric current drive, brightness there may be the biggest difference.Therefore, in HID lamp
Control circuit in, be not suitable for using constant voltage or current constant control.
The output of inverse-excitation type DC-DC converter is unidirectional current, directly it can be caused damage by DC powered HID lamp.
By contrast, use alternating current to be driven, the most anti-phase uniform conducting of HID lamp can be made, contribute to extending its service life.Cause
This, in the control circuit of HID lamp, be not suitable for using DC driven.
Additionally, due to the start-up course of HID lamp is complicated, and duty is easily affected by the external environment, and needs good control
Making mechanism and protection mechanism.It is abnormal no matter which kind of duty is HID lamp be under generation, all can protect locking in time, and different
Unlock after often releasing and restart.Therefore, in the control circuit of HID lamp, it is desirable to complete protection mechanism can be provided for HID.
Summary of the invention
In view of this, it is an object of the invention to provide the control circuit of a kind of high-voltage gas discharging light, control method and
Drive circuit, wherein, uses the DC-DC converter improved to realize startup and the brilliance control of HID lamp, uses alternating current to drive
HID lamp is to increase the service life, and provides complete protection module to improve circuit reliability.
According to the first aspect of the invention, it is provided that the control circuit of a kind of high-voltage gas discharging light, it is used for controlling main circuit
And full bridge driving circuit, described high-voltage gas discharging light includes as the load of full bridge driving circuit, described control circuit: first
Switch drive module, for providing the first switch controlling signal for the first switching tube in main circuit；Second switch drives module,
For providing second switch control signal and the 3rd switch controlling signal for the multiple second switch pipes in full bridge driving circuit；Shape
State control module, for providing the first logic control signal for the first switch drive module, and drives module for second switch
Thering is provided the second logic control signal, wherein, second switch described in described state controlling module controls drives module so that in lighting
In stage, described second switch drives module to control the conducting state of the plurality of second switch pipe to provide unidirectional electrical stream
Footpath, startup stage in, described second switch drives module to control the conducting state of the plurality of second switch pipe to provide double
To current path.
Preferably, when the plurality of second switch pipe in full bridge driving circuit provides unidirectional current path, described entirely
Bridge drive circuit provides unidirectional current, when the plurality of second switch pipe in full bridge driving circuit provides bidirectional current path,
Described full bridge driving circuit provides alternating current.
Preferably, described startup stage in, described second switch control signal is described 3rd switch controlling signal
Inversion signal.
Preferably, continuous print first time period and the second time period are included the startup stage of described, in described first time period
In, described second switch control signal and described 3rd switch controlling signal are the pulse signal of first frequency, described second
In time period, described second switch control signal and described 3rd switch controlling signal are the pulse signal of second frequency, wherein,
Described first frequency is less than described second frequency.
Preferably, described first switch drive module controls the conducting state of described first switching tube optionally to provide
First output voltage of one of constant voltage and firm power.
Preferably, in the described lighting stage, described first switch drive module controls the conducting of described first switching tube
State is to provide the first output voltage of constant voltage.
Preferably, described startup stage in, described first switch drive module control described first switching tube conducting
State is to provide the first output voltage of firm power.
Preferably, the startup stage of described, include continuous print the 3rd time period and the 4th time period, in described 3rd time period
In, described first switch drive module controls the conducting state of described first switching tube to provide the first output electricity of the first power
Pressure, in described 4th time period, described first switch drive module controls the conducting state of described first switching tube to provide
First output voltage of the second power, wherein, described first power is more than described second power.
Preferably, also include modulating voltage detection module, for startup stage in, detection high-voltage gas discharging light lamp electricity
Press to judge that high-voltage gas discharging light is in cold conditions or hot.
Preferably, described modulating voltage detection module startup stage start after, just detect height through delay scheduled time
The modulating voltage of pressure gas discharge lamp.
Preferably, also include: Logic control module, control letter for producing the first driving according to the first logic control signal
Number, described first switch drive module produces the first switch controlling signal according to described first drive control signal；And control
Loop, for providing loop control signal for Logic control module, to realize the control function of firm power.
Preferably, described control loop includes: multiplier, will be used for the current detection signal characterizing output electric current and is used for
The voltage detection signal characterizing the first output voltage is multiplied, it is thus achieved that the first output sampled signal；Error amplifier, according to merit
Rate reference signal and the first output sampled signal, it is thus achieved that error amplification signal；Comparator, according to error amplification signal and use
In the first current detection signal of the peak point current characterizing the first switching tube, produce described loop control signal.
Preferably, also include selected from least one of following protection module: open-circuit-protection module, short circuit protection module, mistake
Temperature protection module, overvoltage protective module, abnormal protection module, described protection module provides corresponding to described status control module
Protection triggers signal.
According to the second aspect of the invention, it is provided that the control method of a kind of high-voltage gas discharging light, it is used for controlling main circuit
And full bridge driving circuit, described high-voltage gas discharging light includes as the load of full bridge driving circuit, described control method: provide
First switch controlling signal, to control the conducting state of the first switching tube in main circuit；And provide second switch to control letter
Number and the 3rd switch controlling signal, to control the conducting state of the multiple second switch pipes in full bridge driving circuit, wherein, at point
In the lamp stage, control the conducting state of the plurality of second switch pipe to provide unidirectional current path, startup stage in, control
The conducting state of the plurality of second switch pipe is to provide bidirectional current path.
Preferably, when the plurality of second switch pipe in full bridge driving circuit provides unidirectional current path, described entirely
Bridge drive circuit provides unidirectional current, when the plurality of second switch pipe in full bridge driving circuit provides bidirectional current path,
Described full bridge driving circuit provides alternating current.
Preferably, described startup stage in, described second switch control signal is described 3rd switch controlling signal
Inversion signal.
Preferably, continuous print first time period and the second time period are included the startup stage of described, in described first time period
In, described second switch control signal and described 3rd switch controlling signal are the pulse signal of first frequency, described second
In time period, described second switch control signal and described 3rd switch controlling signal are the pulse signal of second frequency, wherein,
Described first frequency is less than described second frequency.
Preferably, control the conducting state of described first switching tube, optionally to provide constant voltage and firm power
One of the first output voltage.
Preferably, in the described lighting stage, control the conducting state of described first switching tube to provide constant voltage
First output voltage.
Preferably, described startup stage in, control the conducting state of described first switching tube to provide firm power
First output voltage.
Preferably, the startup stage of described, include continuous print the 3rd time period and the 4th time period, in described 3rd time period
In, control the conducting state of described first switching tube to provide the first output voltage of the first power, in described 4th time period
In, control the conducting state of described first switching tube to provide the first output voltage of the second power, wherein, described first power
More than described second power.
Preferably, the startup stage of being additionally included in, detection high-voltage gas discharging light modulating voltage to judge that gases at high pressure are put
Electric light is in cold conditions or hot.
Preferably, startup stage start after, through delay scheduled time just detect high-voltage gas discharging light lamp electricity
Pressure.
Preferably, before the lighting stage, also include: reseting stage, wherein, be not fully complete in system electrification or protect
During locking, system enters reseting stage.
Preferably, in reseting stage, the first switching tube in described main circuit and the institute in described full bridge driving circuit
State multiple second switch pipe and be in off-state.
Preferably, before the lighting stage, also include: the pre-lighting stage, wherein, at system electrification and protection latch-release
Constantly, system enters the pre-lighting stage.
Preferably, in the pre-lighting stage, control the conducting state of the plurality of second switch pipe to provide bidirectional current
Path.
According to the third aspect of the invention we, it is provided that the drive circuit of a kind of high-voltage gas discharging light, including: main circuit, wraps
Include the first switching tube；Full bridge driving circuit, including multiple second switch pipes, wherein, described full bridge driving circuit is as described master
The load of circuit, described high-voltage gas discharging light is as the load of full bridge driving circuit；And control circuit, it is used for controlling main electricity
Road and full bridge driving circuit, described control circuit includes: the first switch drive module, is used for as the first switching tube in main circuit
First switch controlling signal is provided；Second switch drives module, for carrying for the multiple second switch pipes in full bridge driving circuit
For second switch control signal and the 3rd switch controlling signal；Status control module, for providing for the first switch drive module
First logic control signal, and drive module to provide the second logic control signal for second switch, wherein, described state controls
Module controls described second switch and drives module so that in the lighting stage, and it is described many that described second switch drives module to control
The conducting state of individual second switch pipe to provide unidirectional current path, startup stage in, described second switch drive module control
Make the conducting state of the plurality of second switch pipe to provide bidirectional current path.
Preferably, described main circuit also includes: first input end and the second input, is used for receiving DC input voitage；
And first outfan and the second outfan, for providing the first output voltage.
Preferably, described main circuit also includes: the first transformator, and including primary side winding and vice-side winding, described first becomes
Primary side winding and described first switching tube of depressor are connected in series between first input end and the second input；And the one or two
Pole is managed, and the vice-side winding of described first transformator and described first Diode series are connected to the first outfan and the second outfan
Between.
Preferably, the plurality of second switch pipe composition be connected in parallel between the first outfan and the second outfan the
One brachium pontis and the second brachium pontis, and the second output is provided between the intermediate node and the intermediate node of the second brachium pontis of the first brachium pontis
Voltage.
Preferably, described full bridge driving circuit also includes multiple gate driver circuit, drives the plurality of second to open respectively
Guan Guan.
Preferably, described control circuit from the former avris of described first transformator obtain the first switching tube drain signal and
For characterizing the first current detection signal of the peak point current of the first switching tube, obtain use from the secondary side of described first transformator
In the first voltage detection signal characterizing the first output voltage.
The control circuit of high-voltage gas discharging light according to embodiments of the present invention, control method and drive circuit, in difference
Stage provides different driving methods, such that it is able to maintain the brightness stability of high-voltage gas discharging light, increase the service life.Defeated
Going out end, being driven DC inverter by full-bridge is alternating current, is conducive to extending the working life of HID lamp.Light for HID lamp
After resistance value have randomness and temperature drift, use power limitation control mode, it is ensured that brightness of illumination is uniform and stable.Judge HID lamp
The original state lighted is cold conditions or hot, and controls output accordingly, it is achieved rapidly pre-warming starts.In this control circuit
Put multiple protection mechanism, it is ensured that the work that HID lamp all can be safe and reliable under different operating state.
Accompanying drawing explanation
By description to the embodiment of the present invention referring to the drawings, above-mentioned and other purposes of the present invention, feature and
Advantage will be apparent from.
Fig. 1 illustrates the system architecture schematic diagram of HID lamp drive circuit according to embodiments of the present invention；
Fig. 2 illustrates the internal frame diagram of HID lamp control circuit according to embodiments of the present invention；
Fig. 3 illustrates the working waveform figure of HID lamp control circuit according to embodiments of the present invention；
Fig. 4 illustrates the flow chart of HID lamp control method according to embodiments of the present invention.
Detailed description of the invention
It is more fully described the present invention hereinafter with reference to accompanying drawing.In various figures, it is attached that identical element employing is similar to
Figure labelling represents.For the sake of clarity, the various piece in accompanying drawing is not necessarily to scale.Additionally, may not show in the drawings
Go out part known to some.
Describe hereinafter the many specific structure of details, such as device, material, size, place's science and engineering of the present invention
Skill and technology, in order to be more clearly understood that the present invention.But the most as the skilled person will understand, can not press
The present invention is realized according to these specific details.
Fig. 1 illustrates the system architecture schematic diagram of HID lamp drive circuit according to embodiments of the present invention.HID lamp drive circuit
100 use inverse-excitation type DC-DC converter topological structure.The first input end of this HID lamp drive circuit 100 and the second input it
Between receive DC input voitage Vi, modulating voltage V is provided between the first outfan and the second outfanlamp.This HID lamp drive circuit
100 include transformator T1.
At the former avris of transformator T1, this HID lamp drive circuit 100 also includes electric capacity C1, main switch M1 and HID lamp control
Circuit 110 processed.Electric capacity C1 is connected between first input end and the second input, for input voltage ViIt is filtered.Become
The primary side winding of depressor T1 and main switch M1 are connected in series between first input end and the second input, wherein primary side winding
Same Name of Ends be connected to first input end, different name end is connected to main switch M1.Such as, main switch M1 is N-type MOSFET (gold
Belong to oxide semiconductor field effect effect transistor).HID lamp control circuit 110 is from the primary side winding of transformator T1 and main switch
The intermediate node of M1 obtains drain signal Vd.Current measuring element is connected in series with main switch M1, is used for characterizing master to obtain
First current detection signal I of the peak point current of switching tube M1CS.HID lamp control circuit 110 produces the first switch controlling signal
Vpwm, for controlling conducting and the disconnection of main switch M1.
In the secondary side of transformator T1, this HID lamp drive circuit 100 also includes diode D1, electric capacity C2, resistance R1 extremely
R4 and full bridge driving circuit.Diode D1 is connected in series with the vice-side winding of transformator T1, wherein the Same Name of Ends of vice-side winding
Ground connection, different name end is connected to the anode of diode D1.Resistance R1 and R2 forms the first resistance pressure-dividing network, and resistance R3 and R4 forms
Second resistance pressure-dividing network.Electric capacity C2, the first resistance pressure-dividing network and the second resistance pressure-dividing network are connected in diode D1 in parallel
Negative electrode and earth terminal between.The first output voltage V is produced at the two ends of electric capacity C2DC.First resistance pressure-dividing network and the second electricity
Resistance potential-divider network is for obtaining for characterizing the first output voltage VDCThe first voltage detection signal Vf1With the second voltage detecting letter
Number Vf2.Current measuring element is connected in series with full bridge driving circuit, to obtain the second current detecting for characterizing output electric current
Signal IS。
HID lamp control circuit 110 obtains the first current detection signal I from transformer primary avrisCSLeakage with main switch M1
Pole signal, obtains the second current detection signal I from transformer secondary sideS, the first voltage detection signal Vf1With the second voltage detecting
Signal Vf2, through internal PWM loop modulation, produce the first switch controlling signal V of certain dutycyclepwm, control main switch M1
Conducting and disconnection, and then control from input to outfan energy conversion.
The first output voltage V that inverse excitation type converter producesDCIt it is DC voltage.As described above, if life-time service is straight
Stream electric drive HID lamp, then can produce damage to fluorescent tube.
Therefore, in HID drive circuit, full bridge driving circuit is as the load of inverse excitation type converter, further by direct current
First output voltage V of electricity formDCInversion is converted into the second output voltage V of alternating current formAC, to extend the use of HID lamp
Life-span.As it is shown in figure 1, full bridge driving circuit includes switching tube M11, M12, M21 and M22, and corresponding gate driver circuit
HS1、LS1、HS2、LS2.Switching tube M11 and M12 separately constitutes high side switch pipe and the low-side switch pipe of the first brachium pontis, opens
Close pipe M21 and M22 and separately constitute high side switch pipe and the low-side switch pipe of the second brachium pontis.
HID lamp control circuit 110 produces second switch control signal QP and the 3rd switch controlling signal QN.Second switch control
Signal QP processed divides to switching tube M11 and M22, the 3rd switch controlling signal QN via gate driver circuit HS1 and LS2 offer respectively
Do not provide to main switch M12 and M21 via gate driver circuit LS1 and HS2.Second switch control signal QP and the 3rd switch
Control signal QN antilogical each other, i.e. when second switch control signal QP is high level, the 3rd switch controlling signal QN is low
Level, vice versa.
When full bridge driving circuit works, switching tube M11 and M12 complementation conducting and disconnection, switching tube M21 and M22 is complementary
Conducting and disconnection.And, switching tube M11 and M22 synchronizes conducting and disconnects, and switching tube M21 and M12 synchronizes conducting and disconnect.?
The first output voltage is provided between secondary nodal point between primary nodal point and switching tube M21 and M22 of switching tube M11 and M12
VDC。
Load blocks is connected between above-mentioned primary nodal point and secondary nodal point.When full bridge driving circuit works, first
Output voltage VDCLoad blocks is flowed alternately through along contrary direction.Switching tube M11 and M22 conducting and main switch M12 and
When M21 disconnects, electric current flows through load blocks from primary nodal point to secondary nodal point.Disconnect and main switch at switching tube M11 and M22
During M12 and M21 conducting, electric current flows through load blocks from secondary nodal point to primary nodal point.Therefore, the first output voltage VDCFor exchange
Voltage.
Such as, as it is shown in figure 1, load blocks includes transformator T2, switching discharge tube D4 and HID lamp.Transformator T2's is former
Limit winding and switching discharge tube D4 are connected in series between primary nodal point and secondary nodal point.The vice-side winding of transformator T2 and HID
Lamp is connected in series between primary nodal point and secondary nodal point.Therefore, HID lamp is as the load of the former avris of transformator T2, wherein
Primary side winding applies modulating voltage V in HID lamplamp.HID lamp startup stage, the switching discharge tube of the former avris of transformator T2
D4 punctures rapidly, produces high voltage, thus light HID lamp on the vice-side winding of transformator T2.
Preferably, electric capacity C3 is connected between above-mentioned primary nodal point and secondary nodal point, thus filters high frequency component signal,
To maintain the steady statue of HID lamp and to reduce electromagnetic noise.
Fig. 2 illustrates the internal frame diagram of HID lamp control circuit according to embodiments of the present invention.HID lamp control circuit 110 includes
Status control module 111, power control module 112, Logic control module the 113, first switch drive module 115, second switch
Drive module 116, clock module 151, multiple detection module and multiple protection module.
Status control module 111 and power control module 112, Logic control module the 113, first switch drive module 115,
Second switch drives module 116, clock module 151, multiple detection module and multiple protection module to connect respectively, is used for receiving inspection
Survey signal and control signal is provided.Clock module 151 is for providing required clock pulses for status control module 111.
As in figure 2 it is shown, the plurality of detection module includes the modulating voltage detection module 121 of HID lamp, the lowest point detection module
122 and lighting state detection module 123.The modulating voltage detection module 121 of HID lamp is connected in HID lamp drive circuit first
Resistance pressure-dividing network, for obtaining the first output voltage VDCThe first voltage detection signal Vf1.The lowest point detection module 122 connects
The drain electrode of the main switch M1 to HID lamp drive circuit, for obtaining drain signal V of main switch M1d.Lighting state is examined
Slowdown monitoring circuit 123 is used for obtaining the sign successful signal of lighting.
Modulating voltage detection module 121 delay scheduled time after HID lamp punctures of HID lamp, then detection modulating voltage Vlamp,
Such that it is able to judge that HID lamp is in cold conditions or hot.
The lowest point detection module 122 is according to drain signal V of main switch M1dJudge whether this voltage is in resonance the lowest point.
Status control module 111 controls the turn-on instant of main switch M1 according to judged result, in resonance under quasi-resonance control model
Valley conduction M1, thus reduce switch tube voltage stress and switching loss.
Further, as in figure 2 it is shown, the plurality of protection module includes open-circuit-protection module 131, short circuit protection module
132, overheat protector module 133, overvoltage protective module 134, abnormal protection module 135.The plurality of protection module can use
Known circuit module, provides corresponding lighting state signal and protection to trigger signal to status control module 111 respectively.
Status control module 111 is according to the detection signal and the lighting of the plurality of protection module of the plurality of detection module
Status signal and protection trigger signal, produce multiple logic control signal, are used for controlling power control module 112, logic control
Module 113 and second switch drive module 116.
Power control module 112 is connected with status control module 111, produces power reference signal according to logic control signal
Pref。
Logic control module 113 is connected with status control module 111, produces according to logic control signal and drives control letter
Number.First switch drive module 114 is connected with Logic control module 113, produces first according to switch controlling signal further and opens
Close control signal Vpwm, for controlling conducting and the disconnection of main switch M1.
Second switch drives module 116 to be connected with status control module 111, produces second switch according to logic control signal
Control signal QP and the 3rd switch controlling signal QN, for controlling switching tube M11, M12, M21 and the M22 in full bridge driving circuit
Conducting and disconnection.
Further, HID lamp control circuit 110 includes controlling loop.Described control loop includes that multiplier I1, error are put
Big device I2 and comparator I3.
Multiplier I1 will be used for characterizing the second current detection signal I of output electric currentSWith for characterize the first output voltage
VDCThe second voltage detection signal Vf2It is multiplied, thus obtains the first output sampled signal Ps。
The in-phase input end of error amplifier I2 and inverting input receive power reference signal P respectivelyrefWith the first output
Power samples signal Ps, thus obtain error amplification signal Vcomp。
The in-phase input end of comparator I3 and inverting input receive error amplification signal V respectivelycompBe used for characterizing master
First current detection signal I of the peak point current of switching tube M1CS, and produce loop control signal and be supplied to Logic control module
113。
In the HID lamp control circuit 110 of this embodiment, multiplier I1 is used to obtain the first output work in controlling loop
Rate sampled signal Ps, and produce error amplification signal V compared with power reference signal Prefcomp, therefore, this control loop
Firm power control can be realized during feedback control.
Fig. 3 illustrates the working waveform figure of HID lamp control circuit according to embodiments of the present invention.In figure 3, from top to bottom
Article three, curve represents the first output voltage V respectivelyDC, modulating voltage VlampThe most bent with second switch control signal QP
Line.After HID lamp starts, the 3rd switch controlling signal QN is the inverted version of second switch control signal QP, the most not single
3rd switch controlling signal QN is solely shown.
Fig. 4 illustrates the flow chart of HID lamp control method according to embodiments of the present invention.Further below in conjunction with Fig. 3 and Fig. 4
The HID lamp control method using above-mentioned HID lamp control circuit to realize is described.
In step S01, system electrification.
In step S02, system is in the first stage, and i.e. reset state.Such as, it is not fully complete when system electrification or protects
When protecting locking, system is in reset state.Now HID lamp control circuit 110 disconnects the first switch controlling signal Vpwm, second open
Close control signal QP and the 3rd switch controlling signal QN, thus turn off main switch M1 and full bridge driving circuit.
Owing to not applying modulating voltage V in HID lamplamp, therefore, HID lamp is off state.
In step S03, system is in second stage, the most pre-lighting state.When system electrification and protection latch-release,
HID lamp control circuit 110 produces the first switch controlling signal Vpwm, second switch control signal QP and the 3rd switch controlling signal
QN.Main switch M1 is at the first switch controlling signal VpwmControl under turn on and disconnect.Switching tube in full bridge driving circuit
M11, M12, M21 and M22 turn under the control of second switch control signal QP and the 3rd switch controlling signal QN and disconnect.
Under the modulation of HID lamp control circuit 110, input carries energy to outfan.Due to now switching discharge tube
D4 does not punctures, and HID lamp is non-lit up.Output is the least, therefore the first output voltage VDCCan raise rapidly.High side gate drive electricity
The built-in boostrap circuit of road HS1 and HS2, at this stage full bridge driving circuit with first frequency Fhb1Boot.Due to bootstrapping, open
Close pipe M11 and M21Grid voltage with the first output voltage VDCRising and raise, until be enough to drive switching tube M11And M21Real
Existing switch motion.In pre-lighting stage, full bridge driving circuit commutation.
In step S04, system is in the phase III, i.e. lighting state.When HID lamp control circuit 110 detects first
Output voltage VDCHigher than V1Time, system enters the lighting stage from the pre-lighting stage.Now, HID lamp control circuit 110 is in constant voltage mould
Formula.
First output voltage VDCContinue to rise to V3, under this voltage, switching discharge tube D4 can be breakdown.Puncturing moment, transformation
Device T2The high pressure V of up to 23k volt it is coupled out at HID lamp two ends4, HID lamp is punctured and lights, complete lighting process.
In lighting state, when puncturing due to HID lamp, alternating current is used to drive HID lamp to easily lead to arc extinguishing, therefore at point
The full bridge driving circuit no longer commutation of lamp stage, to play continuous arc effect.
In step S05, system is in fourth stage, i.e. starting state.After HID lamp punctures and lights, modulating voltage Vlamp
Reduce rapidly.When HID lamp control circuit 110 detects that the modulating voltage of HID lamp is less than V2Time, then it is assumed that HID successfully lights, and enters
Startup stage.Otherwise it is assumed that lighting failure, return reseting stage.
In starting state, HID lamp control circuit 110 produces second switch control signal QP and the 3rd switch controlling signal
QN, thus control full bridge driving circuit and carry out commutation.
This starting state can improve and be divided into continuous print first time period and the second time period.At moment t0 to t2, i.e. first
Time period, described second switch control signal QP and the 3rd switch controlling signal QN are second frequency Fhb2Pulse signal.Time
After carving t2, the i.e. second time period, described second switch control signal QP and the 3rd switch controlling signal QN are the 3rd frequencies Fhb3
Pulse signal.Wherein, second frequency Fhb2Less than the 3rd frequency Fhb3。
Therefore, in the first time period of starting state, full bridge driving circuit is with the lowest second frequency Fhb2Change
Phase, in the second time period started, full bridge driving circuit is with normal 3rd frequency Fhb3Carry out commutation.Use the very first time
The low frequency commutation of section is possible to prevent HID lamp arc extinguishing.
Further, according to the modulating voltage of HID lamp, HID lamp lights the original state of moment can be divided into cold conditions and hot.
The modulating voltage of HID lamp increases with the rising of temperature, finally reaches stable in thermolamp state.Therefore, the startup of HID lamp may need
Want a warm.
In a preferred embodiment, realize, in fourth stage, the function that rapidly pre-warming starts.Correspondingly, this fourth stage bag
Include multiple continuous print time period.
At moment t0 to t1, i.e. after system enters starting state, delay scheduled time section Td, in order to sample exactly
The modulating voltage of HID lamp.Momentary conditions is punctured complicated, by delay scheduled time section T in HID lampdCan avoid puncturing moment pair
The impact of sampled signal.
After instant tl, can judge that the original state of HID lamp is cold conditions or heat according to the sampled signal of modulating voltage
State.If original state is cold conditions, the most first HID lamp is carried out pre-thermal drivers, the most just carries out driven.If original state
It is hot, the most directly carries out driven.
During above-mentioned pre-thermal drivers, the status control module 111 of HID lamp control circuit 110 controls mould to power
Block 112 provides control signal to change power reference signal PrefNumerical value, thus change output Po.When pre-thermal drivers
The output used is more than the output used during driven.
When the either phase of the second to fourth stage occurs abnormal, this HID lamp control method performs step S06.In step
In rapid S06, once system thinks that should carry out protection locks, then will be back to step S02, and i.e. be back to reseting stage, again
Carry out lighting start-up course.
The built-in multiple detection modules of described HID lamp control circuit 110 and multiple protection module, to ensure that system is in each work
Make the work that under state, all energy is safe and reliable.Status control module 111 is according to the detection signal of the plurality of detection module and institute
Lighting state signal and the protection of stating multiple protection module trigger signal, produce multiple logic control signal, thus control main opening
Close the work of pipe and full bridge driving circuit.When occurring abnormal, when system is back to reset state, main switch will be turned off with complete
Bridge drive circuit.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Including process, method, article or the equipment of described key element there is also other identical element.
According to embodiments of the invention as described above, these embodiments do not have all of details of detailed descriptionthe, the most not
Limit the specific embodiment that this invention is only described.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is to preferably explain the principle of the present invention and actual application, so that affiliated
Technical field technical staff can utilize the present invention and amendment on the basis of the present invention to use well.The present invention is only by right
Claim and four corner thereof and the restriction of equivalent.
Claims (33)
1. a control circuit for high-voltage gas discharging light, is used for controlling main circuit and full bridge driving circuit, described gases at high pressure
Discharge lamp includes as the load of full bridge driving circuit, described control circuit:
First switch drive module, for providing the first switch controlling signal for the first switching tube in main circuit；
Second switch drives module, for providing second switch control signal for the multiple second switch pipes in full bridge driving circuit
With the 3rd switch controlling signal；
Status control module, for providing the first logic control signal for the first switch drive module, and drives for second switch
Dynamic model block provides the second logic control signal,
Wherein, second switch described in described state controlling module controls drives module so that in the lighting stage, described second opens
Close drive module control the plurality of second switch pipe conducting state to provide unidirectional current path, startup stage in, institute
Stating second switch drives module to control the conducting state of the plurality of second switch pipe to provide bidirectional current path.
Control circuit the most according to claim 1, wherein, the plurality of second switch pipe in full bridge driving circuit carries
During for unidirectional current path, described full bridge driving circuit provides unidirectional current,
When the plurality of second switch pipe in full bridge driving circuit provides bidirectional current path, described full bridge driving circuit carries
For alternating current.
Control circuit the most according to claim 1, wherein, described startup stage in, described second switch control signal
It it is the inversion signal of described 3rd switch controlling signal.
Control circuit the most according to claim 3, wherein, includes continuous print first time period and second startup stage of described
Time period, in described first time period, described second switch control signal and described 3rd switch controlling signal are the first frequency
The pulse signal of rate, in described second time period, described second switch control signal and described 3rd switch controlling signal are
The pulse signal of second frequency,
Wherein, described first frequency is less than described second frequency.
Control circuit the most according to claim 1, wherein, described first switch drive module controls described first switching tube
Conducting state optionally to provide the first output voltage of one of constant voltage and firm power.
Control circuit the most according to claim 5, wherein, in the described lighting stage, described first switch drive module
Control the conducting state of described first switching tube to provide the first output voltage of constant voltage.
Control circuit the most according to claim 5, wherein, described startup stage in, described first switch drive module
Control the conducting state of described first switching tube to provide the first output voltage of firm power.
Control circuit the most according to claim 7, wherein, includes continuous print the 3rd time period and the 4th startup stage of described
Time period, in described 3rd time period, described first switch drive module control described first switching tube conducting state with
Thering is provided the first output voltage of the first power, in described 4th time period, described first switch drive module controls described the
The conducting state of one switching tube to provide the first output voltage of the second power,
Wherein, described first power is more than described second power.
Control circuit the most according to claim 1, also includes modulating voltage detection module, for startup stage in, detection
The modulating voltage of high-voltage gas discharging light is to judge that high-voltage gas discharging light is in cold conditions or hot.
Control circuit the most according to claim 9, wherein, described modulating voltage detection module startup stage start after,
The modulating voltage of high-voltage gas discharging light is just detected through delay scheduled time.
11. control circuits according to claim 1, also include:
Logic control module, for producing the first drive control signal according to the first logic control signal, described first switch drives
Dynamic model tuber produces the first switch controlling signal according to described first drive control signal；And
Control loop, for providing loop control signal for Logic control module, to realize the control function of firm power.
12. control circuits according to claim 11, wherein, described control loop includes:
Multiplier, believes being used for the current detection signal characterizing output electric current with the voltage detecting being used for characterizing the first output voltage
Number it is multiplied, it is thus achieved that the first output sampled signal；
Error amplifier, according to power reference signal and the first output sampled signal, it is thus achieved that error amplification signal；
Comparator, according to error amplification signal with for characterizing the first current detection signal of the peak point current of the first switching tube,
Produce described loop control signal.
13. control circuits according to claim 1, also include selected from least one of following protection module: open-circuit-protection
Module, short circuit protection module, overheat protector module, overvoltage protective module, abnormal protection module, described protection module is to described shape
State control module provides corresponding protection to trigger signal.
The control method of 14. 1 kinds of high-voltage gas discharging lights, is used for controlling main circuit and full bridge driving circuit, described gases at high pressure
Discharge lamp includes as the load of full bridge driving circuit, described control method:
There is provided the first switch controlling signal, to control the conducting state of the first switching tube in main circuit；And
There is provided second switch control signal and the 3rd switch controlling signal, to control the multiple second switches in full bridge driving circuit
The conducting state of pipe,
Wherein, in the lighting stage, control the conducting state of the plurality of second switch pipe to provide unidirectional current path, opening
In the dynamic stage, control the conducting state of the plurality of second switch pipe to provide bidirectional current path.
15. control methods according to claim 14, wherein, the plurality of second switch pipe in full bridge driving circuit
When providing unidirectional current path, described full bridge driving circuit provides unidirectional current,
When the plurality of second switch pipe in full bridge driving circuit provides bidirectional current path, described full bridge driving circuit carries
For alternating current.
16. control methods according to claim 14, wherein, described startup stage in, described second switch control letter
It number it is the inversion signal of described 3rd switch controlling signal.
17. control methods according to claim 16, wherein, include continuous print first time period and startup stage of described
Two time periods, in described first time period, described second switch control signal and described 3rd switch controlling signal are first
The pulse signal of frequency, in described second time period, described second switch control signal and described 3rd switch controlling signal
For the pulse signal of second frequency,
Wherein, described first frequency is less than described second frequency.
18. control methods according to claim 17, wherein, control the conducting state of described first switching tube, to select
Property ground provide one of constant voltage and firm power the first output voltage.
19. control methods according to claim 18, wherein, in the described lighting stage, control described first switching tube
Conducting state with provide constant voltage the first output voltage.
20. control methods according to claim 18, wherein, described startup stage in, control described first switching tube
Conducting state with provide firm power the first output voltage.
21. control methods according to claim 20, wherein, include continuous print the 3rd time period and startup stage of described
Four time periods, in described 3rd time period, control the conducting state of described first switching tube to provide the first of the first power
Output voltage, in described 4th time period, controls the conducting state of described first switching tube to provide the first of the second power
Output voltage,
Wherein, described first power is more than described second power.
22. control methods according to claim 14, the startup stage of being additionally included in, detection high-voltage gas discharging light lamp
Voltage is to judge that high-voltage gas discharging light is in cold conditions or hot.
23. control methods according to claim 22, wherein, startup stage start after, through delay scheduled time
Just detect the modulating voltage of high-voltage gas discharging light.
24. control methods according to claim 14, before the lighting stage, also include:
Reseting stage, wherein, when system electrification is not fully complete or protection locking occurs, system enters reseting stage.
25. control methods according to claim 24, the first switch wherein, in reseting stage, in described main circuit
The plurality of second switch pipe in pipe and described full bridge driving circuit is in off-state.
26. control methods according to claim 14, before the lighting stage, also include:
The pre-lighting stage, wherein, system electrification and protection latch-release constantly, system enter the pre-lighting stage.
27. control methods according to claim 26, wherein, in the pre-lighting stage, control the plurality of second switch
The conducting state of pipe is to provide bidirectional current path.
The drive circuit of 28. 1 kinds of high-voltage gas discharging lights, including:
Main circuit, including the first switching tube；
Full bridge driving circuit, including multiple second switch pipes, wherein, described full bridge driving circuit bearing as described main circuit
Carrying, described high-voltage gas discharging light is as the load of full bridge driving circuit；And
Control circuit, is used for controlling main circuit and full bridge driving circuit, and described control circuit includes:
First switch drive module, for providing the first switch controlling signal for the first switching tube in main circuit；
Second switch drives module, for providing second switch control signal for the multiple second switch pipes in full bridge driving circuit
With the 3rd switch controlling signal；
Status control module, for providing the first logic control signal for the first switch drive module, and drives for second switch
Dynamic model block provides the second logic control signal,
Wherein, second switch described in described state controlling module controls drives module so that in the lighting stage, described second opens
Close drive module control the plurality of second switch pipe conducting state to provide unidirectional current path, startup stage in, institute
Stating second switch drives module to control the conducting state of the plurality of second switch pipe to provide bidirectional current path.
29. drive circuits according to claim 28, wherein, described main circuit also includes:
First input end and the second input, be used for receiving DC input voitage；And
First outfan and the second outfan, for providing the first output voltage.
30. drive circuits according to claim 29, wherein, described main circuit also includes:
First transformator, including primary side winding and vice-side winding, the primary side winding of described first transformator and described first switch
Pipe is connected in series between first input end and the second input；And
First diode, the vice-side winding of described first transformator and described first Diode series be connected to the first outfan and
Between second outfan.
31. drive circuits according to claim 29, wherein, the plurality of second switch pipe composition is connected in first in parallel
The first brachium pontis between outfan and the second outfan and the second brachium pontis, and at the intermediate node of the first brachium pontis and the second brachium pontis
Intermediate node between the second output voltage is provided.
32. drive circuits according to claim 29, wherein, described full bridge driving circuit also includes multiple raster data model electricity
Road, drives the plurality of second switch pipe respectively.
33. drive circuits according to claim 29, wherein, described control circuit is from the former avris of described first transformator
Obtain the drain signal of the first switching tube and for characterizing the first current detection signal of the peak point current of the first switching tube, from institute
The secondary side stating the first transformator obtains for the first voltage detection signal characterizing the first output voltage.
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|---|---|---|---|
| CN201610586989.8A CN106132053A (en) | 2016-07-22 | 2016-07-22 | The control circuit of high-voltage gas discharging light, control method and drive circuit |
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| CN201610586989.8A CN106132053A (en) | 2016-07-22 | 2016-07-22 | The control circuit of high-voltage gas discharging light, control method and drive circuit |
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