CN101351071A - Voltage stabilizer circuit of high voltage discharge lamp - Google Patents
Voltage stabilizer circuit of high voltage discharge lamp Download PDFInfo
- Publication number
- CN101351071A CN101351071A CNA2007101542746A CN200710154274A CN101351071A CN 101351071 A CN101351071 A CN 101351071A CN A2007101542746 A CNA2007101542746 A CN A2007101542746A CN 200710154274 A CN200710154274 A CN 200710154274A CN 101351071 A CN101351071 A CN 101351071A
- Authority
- CN
- China
- Prior art keywords
- voltage
- mentioned
- discharge lamp
- igniter
- firing pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/18—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of DC into AC, e.g. with choppers
-
- 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
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
-
- 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
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The invention relates to a voltage stabilizer circuit of high tension discharge lamp, which comprises: an EMI filter for receiving the AC electric power supply and eliminating static electricity; a rectification unit for implementing electric wave rectification to the static electricity eliminated AC voltage, obtaining a DC voltage and outputting; a PFC circuit for controlling and improving the power factor of DC voltage rectified by the rectification unit; a voltage regulator for increasing the voltage with power factor improved by the PFC circuit; a voltage reducing convertor for receiving the DC voltage increased by the voltage regulator, converting it into fluctuating DC voltage and outputting; a rectifier for receiving the fluctuating DC voltage and supplying constant current to the ignition device; an ignition device for receiving the voltage from the rectifier and generating firing pulse and high voltage; a firing pulse generating cutting component for cutting off the generation of the firing pulse after a period of the supply of the high voltage form the voltage reducing convertor; and a high tension discharge lamp which is lighted by the high voltage generated by the ignition device.
Description
Technical field
The present invention relates to the voltage regulator circuit of high-voltage discharge lamp, relate in particular to the voltage regulator circuit that makes high voltage stable high voltage discharge lamp when mercury vapor lamp or the such high-voltage discharge lamp of sodium vapor lamp lighted.
Background technology
Usually, the pressurizer that is used to light the high-voltage discharge lamp has the structure that copper cash is wrapped in silicon steel plate, and the frequency of utilization of using is 50Hz or 60Hz, therefore, the total power loss of the power loss of the coil of silicon steel plate and copper cash is big, increase the weight of, volume becomes big, so be difficult to be provided with or operate.
In order to solve such problem, in recent years, developed and utilized semi-conductive various electronic voltage regulator, but all peripheral equipment has been caused the electromagnetic wave fault, cause shock hazard etc., exposed problem at secure context.In Fig. 1, illustrate the voltage regulator circuit of the high-voltage discharge lamp that is used to solve such problem.With reference to Fig. 1 as can be known, buck converter (Buck converter) 10 comprises: transistor T R1, and Zener diode (zener diode) Z1, capacitor (capacitor) C6, C7, diode D1, D3, D4, voltage control logic (control logic) IC2 and transformer (transformer) L1, with the dc voltage conversion of 380V is to boost behind the alternating voltage, again it is transformed to direct voltage.Normal voltage generating unit 12 comprises: resistance R 23, R24, R25 and Zener diode Z3, and generate normal voltage Vref.Rectifier (commutator) 14 comprises: pulse amplitude modulation controller IC 3, capacitor C13, C14, C15, C16, resistance R 26, R27 and transistor T R2, TR3, TR4, TR5, and control as follows, that is: receive the direct voltage that is transformed from above-mentioned buck converter 10, and supply with constant current to igniter (ignitor) 16.Igniter 16 comprises: capacitor C2, rheostat (varistor) D2, coil L2, transformer L3, Zener diode Z4, Z5, Z6, Z7, and receive the voltage that provides from above-mentioned rectifier, produce high voltage, it is applied to high-voltage discharge lamp (discharge lamp) 18.High-voltage discharge lamp 18 is lighted by the high voltage that produces from above-mentioned igniter.Current detecting part 20 detects the magnitude of current by resistance R 1, R2, R3 when the high voltage feedback that produces from above-mentioned igniter 16.Voltage detection department 22 detects from the magnitude of voltage of above-mentioned buck converter 10 outputs by resistance R 6, R7.Supervision timer (watchdog timer) 24 comprises: resistance R 12, R13, R14, R15, R16, capacitor C5, C8, transistor T R6, operational amplifier OP1, and be used for sensing and more whether normal voltage has high-tension unusual pulse with chronomere's output of setting.Electric current and voltage mistake (error) detecting part 26 comprise: resistance R 4, R5, R10, R11, R17, R18, R19, capacitor C9, C10, C11, Zener diode Z2, voltage and Current Control control logic IC1, and from current detecting part 20, and voltage detection department 22 current value and the magnitude of voltage that detect to its input, thereby described electric current and voltage mistake detecting part 26 be sensing voltage and current error state corresponding to the pulse signal of exporting from above-mentioned supervision timer.Igniter voltage control division 28 comprises: resistance R 20, R21, R22, capacitor C12, diode D5, operational amplifier OP2, and control as followsly, that is: apply constant voltage to above-mentioned igniter 16.
The stabilizer circuit of aforesaid high-voltage discharge lamp in the past can use in the range of capacity of 70W to 140W, but for example under high power capacity, situation more than the 250W, the capacity of electric current increases, and the voltage control logic IC2 of buck converter 10 is damaged, and causes out of use problem.
In addition, before high-voltage discharge lamp 18 is lighted, because the operation of igniter 16 causes producing at the lamp two ends high voltage, and after 18 quilts of high-voltage discharge lamp under the high voltage of several KV are lighted, DC connects voltage and is reduced to 130V, causes igniter 16 not rerun.But when the damage owing to the damage of voltage control logic IC2 and high-voltage discharge lamp 18 causes high-voltage discharge lamp 18 not lighted, continue to produce firing pulse from igniter 16, thereby cause controlling the impaired problem of transistor T R2～TR5 that constant current flows to the rectifier 14 of igniter 16.
Summary of the invention
The present invention is in order to address the above problem, and its purpose is to provide and can uses under the consumed power of high power capacity, and reduces the stabilizer circuit of the high-voltage discharge lamp of consumed power.
The stabilizer circuit of the high-voltage discharge lamp that another object of the present invention is to provide as described below that is: when the damage owing to voltage control logic and high-voltage discharge lamp causes the high-voltage discharge lamp not lighted, does not produce firing pulse from igniter.
The stabilizer circuit of the high-voltage discharge lamp that another object of the present invention is to provide as described below, that is: after supply is used to light the power supply of high-voltage discharge lamp, through behind the setting-up time, do not produce firing pulse from igniter, thereby, the life-span of realizing the high-voltage discharge lamp prolongs, and prevents shock hazard in advance.
The stabilizer circuit of high-voltage discharge lamp of the present invention to achieve these goals is characterised in that and comprises: electromagnetic interface filter, and it receives the supply of AC power supplies, removes static; Rectification part, it will carry out the electric wave rectification by the alternating voltage that above-mentioned electromagnetic interface filter has been removed static, and be transformed to direct voltage and export; Pfc circuit, its control improves the power factor (PF) by the direct voltage of above-mentioned rectification part rectification; Voltage regulator, it will be boosted by the voltage that above-mentioned pfc circuit has improved power factor (PF); Buck converter, it receives the direct voltage that is boosted by above-mentioned voltage regulator, and conversion is output as the direct voltage that rises or descend; Rectifier, its control is as follows: receive the direct voltage by above-mentioned buck converter conversion, supply with constant current to igniter; Igniter, it receives the voltage of being supplied with by above-mentioned rectifier, produces and output firing pulse and high voltage; Firing pulse produces cut-out portion, and it through behind the setting-up time, cuts off the generation of firing pulse when initially being supplied with by the high voltage of above-mentioned buck converter output; The high-voltage discharge lamp, it is lighted by the high voltage that is produced by above-mentioned igniter.
The stabilizer circuit of above-mentioned high-voltage discharge lamp is characterised in that also and comprises: current detecting part, and it when feeding back the high voltage that is produced by above-mentioned igniter, detects the magnitude of current after above-mentioned high-voltage discharge lamp is lighted; Voltage detection department, it detects from the magnitude of voltage of above-mentioned buck converter output; The igniter voltage control division, its control is as follows, that is: receiving from the voltage of above-mentioned igniter output when above-mentioned high-voltage discharge lamp generation abnormal conditions, so that voltage is not applied to above-mentioned igniter; The normal voltage generating unit, it generates the normal voltage of setting (Vref); Supervision timer, more whether it is used for sensing with the time interval output of setting has high-tension anomalous signals with the normal voltage that is generated by above-mentioned normal voltage generating unit; Electric current and voltage mistake detecting part, it receives current value and the magnitude of voltage that is detected by above-mentioned current detecting part and voltage detection department, and having of the voltage that sensing applied to above-mentioned high-voltage discharge lamp with time interval of being set by above-mentioned supervision timer is no abnormal; Lighting control circuit, it is connected between above-mentioned voltage detection department and the ground connection, regulates the voltage that applies to above-mentioned igniter automatically according to illumination on every side and temperature.
The stabilizer circuit of above-mentioned high-voltage discharge lamp is characterised in that also and comprises: electromagnetic interface filter, it is connected the front end of above-mentioned rectification part, receives AC power supplies, removes static.
The stabilizer circuit of above-mentioned high-voltage discharge lamp is characterised in that, above-mentioned firing pulse produces cut-out portion and comprises: delay portion, it will carry out dividing potential drop from the high voltage of above-mentioned buck converter output, receive above-mentioned by the voltage of dividing potential drop, through behind the setting-up time, produce firing pulse and produce the cut-out control signal; Switch portion, it receives the firing pulse that produces from above-mentioned delay portion and produces and cut off control signal and cut off, and prevents to produce firing pulse.
The stabilizer circuit of above-mentioned high-voltage discharge lamp is characterised in that, above-mentioned delay portion comprises: first charging part, and it will carry out dividing potential drop from the high voltage of above-mentioned buck converter output, and will be above-mentioned by the voltage of dividing potential drop with the time charging of setting; First inverter, its after the time of setting by the charging of above-mentioned first charging part, by the voltage triggered of above-mentioned charging, thereby, with the input voltage counter-rotating and export; Second inverter, its output of will reversing once more from the signal of above-mentioned first inverter counter-rotating output; Second charging part, the voltage that it is exported from above-mentioned second inverter with the time charging of setting; The 3rd inverter, it is exported the input voltage counter-rotating by the voltage triggered by above-mentioned second charging part charging.
The stabilizer circuit of above-mentioned high-voltage discharge lamp is characterised in that above-mentioned switch portion comprises: transistor, and it is by the signal on/off switch by above-mentioned the 3rd inverter counter-rotating and output; Relay, it cuts off by above-mentioned transistorized control, so that above-mentioned igniter does not produce firing pulse.
As mentioned above, among the present invention, do not use the IC chip to block the only voltage of buck converter, and use transformer, thereby, in time the power capacity of high-voltage discharge lamp increases more than the 250W, also can use under the situation of not damaging parts, uses lighting control circuit, according to temperature and illumination on every side, the driving voltage of control high-voltage discharge lamp, thus power consumption can be reduced, and can raise the efficiency.
Description of drawings
Fig. 1 is the voltage regulator circuit figure of high-voltage discharge lamp.
Fig. 2 a and Fig. 2 b are the voltage regulator circuit figure of the high-voltage discharge lamp of one embodiment of the invention.
Fig. 3 is the each several part operation oscillogram to Fig. 2 a and Fig. 2 b of one embodiment of the invention.
Fig. 4 is the measuring oscillogram that the firing pulse of Fig. 2 b is produced cut-out portion 80.
Fig. 5 is the output voltage waveform of the voltage regulator 56 of Fig. 2 a.
Fig. 6 is the firing pulse oscillogram from igniter 68 generations of Fig. 2 a.
Fig. 7 produces the experimental result oscillogram that cut-out portion 80 is connected igniter 68 and measure with firing pulse.
Embodiment
Below, with reference to accompanying drawing, embodiments of the invention are elaborated.Also have, in to explanation of the present invention, omit its detailed explanation may cause misleading aim of the present invention to specifying of relevant known function or structure the time thinking.
Fig. 2 is the voltage regulator circuit of the high-voltage discharge lamp of embodiments of the invention.
Described voltage regulator circuit comprises: EMI (Electro-Magnetic interference) filter 50, and it receives AC power supplies, removes static; Rectification part 52, it will carry out the electric wave rectification from the alternating voltage of above-mentioned electromagnetic interface filter 50 outputs, be transformed to direct voltage and export; PFC (Power FactorCorrection) circuit 54, its control is by the power factor (PF) of the direct voltage of above-mentioned rectification part 52 rectifications, to improve described power factor (PF); Voltage regulator 56, it will be boosted by the voltage that above-mentioned pfc circuit 54 has improved power factor (PF); Buck converter 58, it comprises: transistor Q1, resistance R 17, R100, capacitor C100, C101, Zener diode D100, diode D1, transformer L5, T2, and receive the direct voltage that is risen, and described dc voltage conversion is output as the direct voltage that is risen or descend from above-mentioned voltage regulator 56; Rectifier 66, it comprises: pulse amplitude modulation controller IC 3 and capacitor C13, C14, C15, C16, resistance R 26, R27, transistor T R2, TR3, TR4, TR5, and from the direct voltage of above-mentioned buck converter receiving conversion, and control this direct current and supply with constant currents to igniter 68; Igniter 68, it comprises: capacitor C2, rheostat D2, coil L2, transformer L3, Zener diode Z4, Z5, Z6, Z7, and, produce also output firing pulse and high voltage from above-mentioned rectifier 66 reception voltages; Firing pulse produces cut-out portion 80, it comprises: resistance R 80, R81, R83, capacitor C80,82, inverter (inverter) I1～I3, transistor Q80, diode D10, relay (relay) RY1, and when initially being supplied with, the high voltage of exporting from above-mentioned buck converter 58 behind the process certain hour, cuts off the generation of firing pulse; High-voltage discharge lamp 70, it is lighted by the high voltage that produces from above-mentioned igniter 68; Current detecting part 60, it is after above-mentioned high-voltage discharge lamp 70 is lighted, and feedback detects the magnitude of current by resistance R 1, R2 during from high voltage that above-mentioned igniter 68 produces; Voltage detection department 62, it detects from the magnitude of voltage of above-mentioned buck converter 58 outputs by resistance R 6～R11; Igniter voltage control division 72, it comprises: resistance R 20, R21, R22 and diode D5, capacitor C12 and operational amplifier OP2, and control from the voltage that above-mentioned igniter 68 receives output, voltage is not applied to above-mentioned igniter 68 when preventing that high-voltage discharge lamp 70 from abnormal conditions taking place; Normal voltage generating unit 74, it comprises: resistance R 23, R24, R25, transistor Q8, and generate the normal voltage Vref that sets; Supervision timer 76, it comprises: resistance R 12, R13, R14, R15 and capacitor C5, C8, transistor Q9 and operational amplifier OP1, and be used for sensing with the time interval output of setting and with the normal voltage that generates from above-mentioned normal voltage generating unit 74 more high-tension anomalous signals arranged; Electric current and voltage mistake sense part 78, it comprises: resistance R 4, R6, R18, R19, capacitor C9, C10, C11, supervision timer Z2, electric current and voltage sensing control logic U1, and receive from the current value and the magnitude of voltage of above-mentioned current detecting part 60 and voltage detection department 62 outputs, having of the voltage that sensing applied to high-voltage discharge lamp 70 with time interval of setting by above-mentioned supervision timer 76 is no abnormal; Light control (Dimming) circuit 64, its resistance R 0, and automatic potentiometer (potentiometer) PT1 be connected in series between above-mentioned voltage detection department 62 and the ground connection, and according to around illumination and the automatic regulation voltage of temperature.
Above-mentioned firing pulse produces cut-out portion 80 and comprises: delay portion 82, and it will be from the high voltage dividing potential drop of above-mentioned buck converter 58 outputs, and receives above-mentionedly by the voltage of dividing potential drop, through behind the setting-up time, produces firing pulse and cuts off control signal; Switch portion 84, it receives the firing pulse that produces from above-mentioned delay portion 82 and produces and cut off control signal and cut off, and prevents to produce firing pulse.
Above-mentioned delay portion 82 comprises: first charging part 86, and it comprises: resistance R 80, R81 and capacitor C80, and will be charged with the time of setting by the voltage of dividing potential drop above-mentioned from the high voltage dividing potential drop of above-mentioned buck converter 58 outputs; The first inverter I1, it by the voltage triggered of above-mentioned charging, makes the input voltage counter-rotating and exports after by above-mentioned first charging part 86 charging setting-up times; The second inverter I2, its output of will reversing once more from the signal of above-mentioned first inverter I1 counter-rotating output; Second charging part 88, it comprises resistance R 82 and capacitor C82, will be from the voltage charging setting-up time of above-mentioned second inverter I2 output; The 3rd inverter, it is made input voltage counter-rotating output by the voltage triggered by 88 chargings of above-mentioned second charging part.
Above-mentioned switch portion 84 comprises: transistor Q80, and its signal of exporting by reversing from above-mentioned the 3rd inverter is with switch connection/disconnection; Relay R Y1, it cuts off, in order to avoid produce firing pulses owing to the disconnection of above-mentioned transistor Q80 at above-mentioned igniter 68.
Fig. 3 is the each several part operation oscillogram to Fig. 2 a and Fig. 2 b of one embodiment of the invention.
Fig. 4 is the measuring oscillogram that the firing pulse of Fig. 2 b is produced cut-out portion 80.
Fig. 5 is the output voltage waveform of the voltage regulator 56 of Fig. 2 a.
Fig. 6 is the firing pulse oscillogram from igniter 68 generations of Fig. 2 a.
Fig. 7 produces the experimental result oscillogram that cut-out portion 80 is connected igniter 68 and measure with firing pulse.
With reference to above-mentioned Fig. 2～Fig. 7, describe the operation of preferred embodiment of the present invention in detail.
If energized switch (not shown) is supplied with AC power supplies, then electromagnetic interface filter 50 is removed static.Rectification part 52 will be carried out the electric wave rectification from the alternating voltage of above-mentioned electromagnetic interface filter 50 outputs, be transformed to direct voltage, to pfc circuit 54 outputs.Pfc circuit 54 is controlled, to improve the power factor (PF) by the direct voltage of above-mentioned rectification part 52 rectifications.At this moment, voltage regulator 56 will be boosted by the voltage that above-mentioned pfc circuit 54 has improved power factor (PF).Voltage process transistor Q1 and transformer T2 by above-mentioned voltage regulator 56 boosts are applied to rectifier 66.Rectifier 66 carries out following control, that is: reception will be passed through the transistor Q1 of buck converter 58 and the booster voltage of transformer T2 output by the voltage that above-mentioned voltage regulator 56 boosts, and constant current is supplied with to igniter 68.Igniter 68 receives the voltage of being supplied with by above-mentioned rectifier 66, high voltage supplied with to above-mentioned high-voltage discharge lamp 70, and generation firing pulse as shown in Figure 6, high-voltage discharge lamp 70 is lighted.
If light above-mentioned high-voltage discharge lamp 70, then electric current and voltage sensing control logic U1 are by lead-out terminal OUT, and the constant frequency that output duty cycle is identical applies to supervision timer 76.At this moment, the transistor Q9 of supervision timer 76 is switched on or switched off according to the frequency that applies to base stage, and power source voltage Vcc and earthed voltage are applied to the counter-rotating section (-) of operational amplifier OP1.Thus, operational amplifier OP1 and the normal voltage that generates from above-mentioned normal voltage generating unit 74 and compare from the signal of above-mentioned transistor Q9 output, output has the signal with the frequency opposite phases that generates from electric current and voltage sensing control logic U1.
In addition, if above-mentioned high-voltage discharge lamp 70 is lighted, then the electric current from igniter 68 feedbacks is comprised that the current detecting part 60 of resistance R 1, R2 detects, if detect a large amount of electric currents at current detecting part 60, then the power supply of the input side of the first transformer L5 (primary side) is not stayed outlet side (secondary side).If the power supply of the input side of the first transformer L5 is not stayed the power supply outlet side, then the voltage of the first transformer L5 reduces, and transistor Q1 is disconnected.Also have,, then carry (pumping) by the outlet side of the first transformer L5 to capacitor C101, thereby the base stage of transistor Q9 is applied high potential by the electric current of current detecting part 60 feedbacks if do not stay the outlet side of the first transformer L5.At this moment, transistor Q9 is disconnected, and operational amplifier OP1 applies ground signalling to counter-rotating end (-).Thus, operational amplifier OP1 exports high level signal to output, and applies to zero end (zero closing) terminal (ZCD) of electric current and voltage sensing control logic U1.At this moment, the voltage that feeds back from igniter 68 is comprised that the voltage detection department 62 of resistance R 6, R7 and resistance R 8, R9, R10, R11 detects, and the voltage that is detected by voltage detection department 62 applies to the feedback voltage input VFB of electric current and voltage sensing control logic U1.At this moment, the electric current that flows to the tie point (node) of resistance R 9 and resistance R 5 applies to the current sense input CS of electric current and voltage sensing control logic U1.Electric current and voltage sensing control logic U1 are made as under one of them the situation in high level or the low level finishing signal that terminal ZCD applies to zero, and whether sensing has to the high voltage that high-voltage discharge lamp 70 applies unusually.
On the other hand, after above-mentioned high-voltage discharge lamp 70 is lighted, from the voltage of igniter 68 feedbacks by resistance R 20, R21 non-counter-rotating end (+) to operational amplifier OP2.At this moment, operational amplifier OP2 will hold the normal voltage of (-) to compare with counter-rotating by the voltage from igniter 68 feedbacks that resistance R 20, R21 apply, if owing to the feedback voltage height takes place to cause the fault of igniter or high-voltage discharge lamp 70, then to output output high potential, improve the current potential of the tie point of resistance R 11 and R9, in order to avoid apply voltage to igniter 68 from buck converter 58.But, operational amplifier OP2 will hold the normal voltage of (-) to compare with counter-rotating by the voltage from igniter 68 feedbacks that resistance R 20, R21 apply, if owing to the normal operation of igniter 68 or high-voltage discharge lamp 70 causes above-mentioned feedback voltage low, then to output output electronegative potential, reduce the current potential of the tie point of resistance R 11 and resistance R 9, apply voltage to igniter 68 from buck converter 59.
Controlling as described above under the state of the voltage that high-voltage discharge lamp 70 applies, according to temperature and illumination and may change to the voltage that high-voltage discharge lamp 70 applies, but because the resistance R 0 and the automatic potentiometer PT1 of light Control current 64 are connected between voltage detection department 62 and the ground connection, thereby, change the current potential of voltage detection department 62 automatically according to temperature or illumination on every side.That is, low as if temperature on every side, illumination is bright, reduces the voltage of voltage detection department 62, if temperature on every side is low, it is dim to throw light on, then the voltage of boosted voltage test section 62.Thereby light control 64 is controlled the voltage that applies to high-voltage discharge lamp 70 according to temperature on every side or illumination.At this moment, for automatic potentiometer PT1 controls voltage according to temperature and illumination automatically, need automatic potentiometer PT1 to be connected with illumination sensor with temperature sensor.
If high-voltage discharge lamp 70 is lighted as described above, mains switch is switched on, and primary power is supplied to, then from the high voltage of buck converter 58 output (for example, 380V) by resistance R 80, R81 dividing potential drop, this branch pressure voltage charges to capacitor C80 as illustrated in fig. 3.Owing to the dividing potential drop of above-mentioned resistance R 80, R81, apply the voltage of about 4V to the two ends of R81//C80.If the charging to above-mentioned capacitor C80 finishes, then the high level signal shown in Fig. 3 (A) applies to the input of inverter I1, and inverter is with the high level signal counter-rotating of input, and the low level signal of output shown in Fig. 3 (B).Shown in Fig. 3 (C), reverse once more by inverter I2 by the low level signal of the output of above-mentioned inverter I1 output and to be output as high level signal.High level signal by above-mentioned inverter 12 outputs blows slowly the time of charging by setting based on the time constant of resistance R 82 and capacitor C82 to capacitor C82 shown in Fig. 3 (D).According to time constant, shown in the following formula of charging interval based on above-mentioned resistance R 82 and capacitor C82.
[formula 1]
τ RXC 1megaX100uF
100 seconds
Above-mentioned inverter 20 is that Schmidt (schmidt) triggers inverter, and output voltage for example is 5V, after 100 seconds (1 minute 40 seconds), and 70.7% 3.3535V (Vout=5V * 0.707=3.535V) charge of 5V voltage to capacitor C82.
At this moment, the voltage of the input of inverter I3 increases gradually, for example surpasses the moment as the 2.5V of trigger voltage as Fig. 3 (D) shown in, and inverter I3 reverses high level signal and is output as low level signal.That is, the trigger voltage of inverter I3 is 2.5V, therefore, approximately just causes the igniter electric voltage exception through about 70～80, and inverter I3 output low level signal is exported the shutoff signal of relay R Y1 shown in Fig. 3 (E).Pass through the base stage of resistance R 83 from the low level signal of above-mentioned inverter I3 output to transistor Q80.If the base stage to above-mentioned transistor Q80 applies low level signal, then transistor Q80 is disconnected.If above-mentioned transistor Q80 is disconnected, then do not have electric current to flow through the coil L1 of relay R Y1, common terminal c was cut off with being connected of normal termination terminal a, thus common terminal c with normally open (open) terminal b and be connected.If the common terminal c of above-mentioned relay R Y1 with normally open terminal b and be connected, then the firing pulse that is taken place by the coil L2 of igniter 68 and transformer L3 and rheostat D2 and capacitor C2 is cut off, thereby firing pulse does not apply to high-voltage discharge lamp 70.That is, if supply with primary power to transistor Q80, then the time that is applied in setting owing to the signal in the high level interval shown in Fig. 3 (E) connects.Thus, relay R Y1 connects igniter 68, and firing pulse is produced, and after the time of setting (for example, 70～80 seconds), cut-off point firearm 68 interrupts the generation of firing pulse.
Fig. 4 produces cut-out portion 80 with firing pulse of the present invention to connect, and by the time constant charging of resistance R 82 and capacitor C82, when the 2.5V that reaches as trigger voltage, makes transistor Q80 become the measuring oscillogram of off-state from on-state simultaneously.Fig. 4 is equivalent to (D) of Fig. 3 and waveform (E).
Fig. 5 can be by confirming dc voltage 400V from the voltage waveform of voltage regulator (boost) 56 outputs.The voltage of voltage regulator 56 is before the lighting of high-voltage discharge lamp 70 and all export the voltage of constant 400V after lighting, but buck converter 58 is output 400V before high-voltage discharge lamp 70 is lighted, after high-voltage discharge lamp 70 is lighted, because the adjusting of duty ratio regulates being reduced to 130V.Voltage-regulation to it realizes in the control of buck converter 58 by electric current and voltage sensing control logic U1.
Fig. 6 is the state experimental result oscillogram down that produces firing pulse, in the oscillogram of Light Condition system mensuration.Do not connecting under the state that firing pulse produces cut-out portion 80, igniter 68 before power supply is cut off till, continue to produce firing pulse as shown in Figure 6.
Fig. 7 is that connection firing pulse generation cut-out portion is after 80s, produces the experimental waveform of the state of firing pulse.Measurement result can be confirmed as follows, that is: firing pulse produces after about 70～80 seconds, and transistor Q80 is disconnected, thereby, the common terminal c of relay R Y1 with normally open terminal b and be connected, do not produce firing pulse.
Claims (6)
1. the stabilizer circuit of a high-voltage discharge lamp is the electronic type stabilizer circuit of high-voltage discharge lamp, it is characterized in that, comprising:
Rectification part, it carries out the electric wave rectification with alternating voltage, is transformed to direct voltage and exports;
Pfc circuit, it improves the power factor (PF) by the direct voltage of above-mentioned rectification part rectification;
Voltage regulator, it will be boosted by the voltage that above-mentioned pfc circuit has improved power factor (PF);
Buck converter, it receives the direct voltage that is boosted by above-mentioned voltage regulator, and conversion is output as the direct voltage that rises or descend;
Rectifier, it receives the direct voltage by above-mentioned buck converter conversion, supplies with constant current to igniter;
Igniter, it receives the voltage of being supplied with by above-mentioned rectifier, produces and output firing pulse and high voltage;
Firing pulse produces cut-out portion, and it through behind the setting-up time, cuts off the generation of firing pulse when initially being supplied with by the high voltage of above-mentioned buck converter output;
The high-voltage discharge lamp, it is lighted by the high voltage that is produced by above-mentioned igniter.
2. according to the stabilizer circuit of the described high-voltage discharge lamp of claim 1, it is characterized in that, also comprise:
Current detecting part, it when feeding back the high voltage that is produced by above-mentioned igniter, detects the magnitude of current after above-mentioned high-voltage discharge lamp is lighted;
Voltage detection department, it detects from the magnitude of voltage of above-mentioned buck converter output;
The igniter voltage control division, it when above-mentioned high-voltage discharge lamp generation abnormal conditions, prevents that voltage is applied to above-mentioned igniter receiving from the voltage of above-mentioned igniter output;
The normal voltage generating unit, it generates the normal voltage of setting (Vref);
Supervision timer, it is by comparing with the normal voltage that is generated by above-mentioned normal voltage generating unit, and whether be used for sensing with the time interval output of setting has high-tension anomalous signals;
Electric current and voltage mistake detecting part, it receives current value and the magnitude of voltage that is detected by above-mentioned current detecting part and voltage detection department, and having of the voltage that sensing applied to above-mentioned high-voltage discharge lamp with time interval of being set by above-mentioned supervision timer is no abnormal;
Lighting control circuit, it is connected between above-mentioned voltage detection department and the ground connection, regulates the voltage that applies to above-mentioned igniter automatically according to illumination on every side and temperature.
3. the stabilizer circuit of high-voltage discharge lamp according to claim 1 and 2 is characterized in that,
Also comprise: electromagnetic interface filter, it is connected the front end of above-mentioned rectification part, receives AC power supplies, removes static.
4. the stabilizer circuit of high-voltage discharge lamp according to claim 3 is characterized in that, above-mentioned firing pulse produces cut-out portion and comprises:
Delay portion, it will carry out dividing potential drop from the high voltage of above-mentioned buck converter output, receive above-mentionedly by the voltage of dividing potential drop, through behind the setting-up time, produce firing pulse and will produce the cut-out control signal;
Switch portion, it receives the firing pulse that produces from above-mentioned delay portion and produces and cut off control signal and cut off, and prevents to produce firing pulse.
5. the stabilizer circuit of high-voltage discharge lamp according to claim 4 is characterized in that, above-mentioned delay portion comprises:
First charging part, it will carry out dividing potential drop from the high voltage of above-mentioned buck converter output, and will be above-mentioned by the voltage of dividing potential drop with the time charging of setting;
First inverter, it by the voltage triggered of above-mentioned charging, thereby was exported the input voltage counter-rotating after the time of being set by above-mentioned first charging part charging;
Second inverter, its output of will reversing once more from the signal of above-mentioned first inverter counter-rotating output;
Second charging part, the voltage that it is exported from above-mentioned second inverter with the time charging of setting;
The 3rd inverter, it is exported the input voltage counter-rotating by the voltage triggered by above-mentioned second charging part charging.
6. the stabilizer circuit of high-voltage discharge lamp according to claim 5 is characterized in that, above-mentioned switch portion comprises:
Transistor, it is by the signal on/off switch by above-mentioned the 3rd inverter counter-rotating and output;
Relay, it is cut to by above-mentioned transistorized control and makes above-mentioned igniter not produce firing pulse.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020070071579A KR100890833B1 (en) | 2007-07-18 | 2007-07-18 | Stabilizer circuit of high voltage discharge lamp |
| KR1020070071579 | 2007-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101351071A true CN101351071A (en) | 2009-01-21 |
Family
ID=40269597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101542746A Pending CN101351071A (en) | 2007-07-18 | 2007-09-17 | Voltage stabilizer circuit of high voltage discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100890833B1 (en) |
| CN (1) | CN101351071A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742791B (en) * | 2008-11-25 | 2012-12-19 | 松下电器产业株式会社 | High-voltage discharge lamp ballast, lighting device and lighting system |
| CN109381202A (en) * | 2017-08-04 | 2019-02-26 | 锐珂（上海）医疗器材有限公司 | A kind of x-ray imaging device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100300287B1 (en) * | 1998-05-28 | 2001-10-27 | 박인복 | Circuit for controlling ignitor |
| US6639369B2 (en) * | 2001-03-22 | 2003-10-28 | International Rectifier Corporation | Electronic dimmable ballast for high intensity discharge lamp |
| KR100455935B1 (en) * | 2002-04-22 | 2004-11-06 | 유니램 주식회사 | Electronic ballast circuit |
| KR20040043320A (en) * | 2002-11-18 | 2004-05-24 | 주식회사 대한트랜스 | Self-cutting device for high pressure intensity discharge lamp |
-
2007
- 2007-07-18 KR KR1020070071579A patent/KR100890833B1/en not_active IP Right Cessation
- 2007-09-17 CN CNA2007101542746A patent/CN101351071A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101742791B (en) * | 2008-11-25 | 2012-12-19 | 松下电器产业株式会社 | High-voltage discharge lamp ballast, lighting device and lighting system |
| CN109381202A (en) * | 2017-08-04 | 2019-02-26 | 锐珂（上海）医疗器材有限公司 | A kind of x-ray imaging device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100890833B1 (en) | 2009-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3291649B1 (en) | Led lamp and lighting device including led lamp | |
| US6515437B1 (en) | Power supply for hybrid illumination system | |
| US7994731B2 (en) | Universal input voltage device | |
| US7952293B2 (en) | Power factor correction and driver circuits | |
| CN102271442B (en) | Driving circuit and control circuit for light emitting diode | |
| CN101604861B (en) | Battery charging control circuit and charger | |
| JP2009522727A (en) | Ripple reduction method for electronic ballast | |
| US6300725B1 (en) | Power supply for hybrid illumination system | |
| TW201524261A (en) | Capacitor step-down led driver and driving method using the same | |
| CN101371621A (en) | A protection device for electronic converters, related converter and method | |
| CA2848600C (en) | Starting circuit for buck converter | |
| EP1969905A1 (en) | Crest factor reduction method for electronically ballasted lamps | |
| EP1679943A1 (en) | Stabilizer circuit for high-voltage discharge lamp | |
| CN102469668B (en) | LED power supply circuit capable of being matched with electronic transformer | |
| CN101351071A (en) | Voltage stabilizer circuit of high voltage discharge lamp | |
| US6608452B1 (en) | Xenon power supply | |
| KR100364505B1 (en) | A electronic ballast for high voltage-discharge lamp using a micro-computer and a method automatically controlling dimming thereof | |
| CN214895724U (en) | High-voltage line interphase fault detection system | |
| CN202077230U (en) | LED power circuit matched with electronic transformer | |
| US6686702B1 (en) | Transformerless xenon power supply | |
| CN112904238A (en) | High-voltage line interphase fault detection system | |
| CN2317595Y (en) | Electronic ballast controlled by one-chip computer | |
| CN2896786Y (en) | Electronic ballast for HID lamp | |
| CN211321548U (en) | Electronic ballast | |
| CN212572165U (en) | PD quick charging power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090121 |