CN201332531Y - DC (direct current) converting circuit - Google Patents
DC (direct current) converting circuit Download PDFInfo
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- CN201332531Y CN201332531Y CNU2008201707490U CN200820170749U CN201332531Y CN 201332531 Y CN201332531 Y CN 201332531Y CN U2008201707490 U CNU2008201707490 U CN U2008201707490U CN 200820170749 U CN200820170749 U CN 200820170749U CN 201332531 Y CN201332531 Y CN 201332531Y
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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 utility model relates to a DC (direct current) converting circuit. The traditional circuit has large volume and high cost. The DC converting circuit comprises a singlechip controlling circuit, a PWM (pulse width modulation) power driving circuit, a single-terminal fly-back converting circuit, an outputting and sampling circuit, and a signal modulating circuit. The singlechip of the utility model generates PMW control pulses with the frequency being 1000 KHZ; the control pulses pass through a driving circuit and control the on/off of a MOS pipe of the single-terminal fly-back converting circuit; the high-frequency AC voltage generated by the secondary side of a high-frequency transformer is rectified by a diode and then forms the DC voltage to supply the electricity for the load; after a resistor conducts the sampling, the sampling signals are fed back to an A/D(analogue-to-digital) inputting channel of the singlechip; the singlechip computes the output voltages of DC and the DC current, adjusts PWM values according to the outputting power, and achieves the purpose of controlling the output constant power. The DC converting circuit has the function of protecting the output open circuit, the output short circuit, the output over current, the input under voltage, and the input over voltage, and possesses the soft start capacity and higher reliability.
Description
Technical field
The utility model belongs to circuit, relates to a kind of DC transfer circuit, is mainly used in the permanent power control of lamp of low-power high-strength electronic amperite of gas-discharge lamp.
Background technology
Low-power high-strength gaseous discharge lamp (hereinafter to be referred as the HID lamp) is the energy-efficient green light source of the third generation after incandescent lamp and fluorescent lamp, the luminous efficiency of HID is that 4 times of tungsten halogen lamp, life-span are more than 10 times of tungsten halogen lamp, and color rendering is better, therefore is the perfect light source that substitutes traditional tungsten halogen lamp.The same with other traditional fluorescent lamp, the HID light fixture has dynatron effect, must join ballast when therefore using and could work, and what tradition was used all is inductance type ballast, and not only volume is big for it, Heavy Weight, and efficient is extremely low, and can not realize instantaneous quick startup.
In order to prolong the useful life of HID lamp, and the color rendering that improves the HID lamp, the general requirement carried out permanent power drive to the HID lamp.Conventional electronic ballast is in order to ensure the permanent power output of HID lamp, often add one-level BOOST power factor correction and voltage stabilizing circuit in the importation of electric ballast, this method can reach the purpose of the permanent power output of lamp, but has increased circuit cost and volume; When load is broken down, can not in time cut off higher output voltage, thereby increase circuit loss in addition, also reduce the reliability of electric ballast.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art exactly, and a kind of novel HID lamp electronic ballast constant-power control circuit is provided.
The utility model comprises single chip machine controlling circuit, pwm power drive circuit, single-ended flyback translation circuit, output sampling circuit, signal conditioning circuit.
Single chip machine controlling circuit comprises single-chip microcomputer IC1, three terminal regulator V1, the first input voltage sample resistance R1, the second input voltage sample resistance R2, the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3, the 4th filter capacitor C4 and filter inductance L1.1 pin of three terminal regulator V1 passes through filter inductance L1 and DC input voitage 12V positive pole, 2 pin ground connection, and 3 pin are+the 5V power output end to be connected with 2 pin by the 4th filter capacitor C4; The two ends of filter inductance L1 are connected with the end of the first filter capacitor C1 and the end of the second filter capacitor C2 respectively; The end of the first input voltage sample resistance R1 is connected with 1 pin of three terminal regulator V1, the other end is connected the other end ground connection of the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 with the end of the second input voltage sample resistance R2 and the end of the 3rd filter capacitor C3.3 pin of single-chip microcomputer IC1 are connected with 3 pin of three terminal regulator V1,5 pin are connected with the other end of the first input voltage sample resistance R1,4 pin ground connection.
The pwm power drive circuit comprises drive circuit IC2 and grid current-limiting resistance R6.7 pin of drive circuit IC2 are connected with 1 pin of three terminal regulator V1, and 4 pin are connected with 6 pin of single-chip microcomputer IC1, and 6 pin are connected with the end of grid current-limiting resistance R6,2 pin, 3 pin and 5 pin ground connection.
The single-ended flyback translation circuit comprises high frequency transformer T1, power MOS pipe M1, rectifier diode D1, high-frequency filter capacitor C10, absorbs capacitor C 9.One end on the former limit of high frequency transformer T1 is connected with 1 pin of three terminal regulator V1, the other end is connected with the drain electrode of power MOS pipe M1, and an end of high frequency transformer T1 secondary is connected other end ground connection with the positive pole of rectifier diode D1; The grid of power MOS pipe M1 is connected with the other end of grid current-limiting resistance R6, source ground; An end that absorbs capacitor C 9 is connected with the drain electrode of power MOS pipe M1, other end ground connection; The end of high-frequency filter capacitor C10 is connected with the negative pole of rectifier diode D1, other end ground connection.
Output sampling circuit comprises the first output voltage sample resistance R7, the second output voltage sample resistance R8, the 3rd output voltage sample resistance R9, the 4th output voltage sample resistance R10 and current sampling resistor R11.The first output voltage sample resistance R7, the second output voltage sample resistance R8 are connected with the negative pole of rectifier diode D1 with a end after the 3rd output voltage sample resistance R9 connects successively, the other end is connected the end ground connection of the other end of the 4th output voltage sample resistance R10 and current sampling resistor R11 with the end of the 4th output voltage sample resistance R10.
Signal conditioning circuit comprises operational amplifier IC3, in-phase input end resistance R 3, inverting input resistance R 4, feedback resistance R5, the 5th filter capacitor C5, the 6th filter capacitor C6, the 7th filter capacitor C7 and the 8th filter capacitor C8.Operational amplifier IC3 connects+5V power supply, 4 pin ground connection.The end of the 5th filter capacitor C5 is connected the other end ground connection of the 5th filter capacitor C5 with 6 pin of single-chip microcomputer IC1, the end of feedback resistance R5,1 pin of operational amplifier IC3 respectively; One end of inverting input resistance R 4 is connected the other end ground connection of inverting input resistance R 4 with the other end of feedback resistance R5 and 2 pin of operational amplifier IC3 respectively; One end of in-phase input end resistance R 3 is connected with the other end of current sampling resistor R11, and the other end of in-phase input end resistance R 3 is connected the other end ground connection of the 6th filter capacitor C6 with the end of the 6th filter capacitor C6 and 3 pin of operational amplifier IC3 respectively; The end of the 7th filter capacitor C7 is connected the other end ground connection of the 7th filter capacitor C7 with 7 pin of 6 pin, 7 pin and the single-chip microcomputer IC1 of operational amplifier IC3 respectively; The end of the 8th filter capacitor C8 is connected the other end ground connection of the 8th filter capacitor C8 with 5 pin of operational amplifier IC3 and the end of the 4th output voltage sample resistance R10 respectively.
Single-chip microcomputer IC1 in the utility model, drive circuit IC2, operational amplifier IC3, power MOS pipe M1, rectifier diode D1 all adopt ripe existing product, can obtain by buying pattern.Adopt MC9S08SH4, drive circuit IC2 to adopt UC3843, operational amplifier IC3 to adopt LM258, power MOS pipe M1 to adopt IRF540, rectifier diode D1 to adopt HFA8TB60 as single-chip microcomputer IC1.
In the utility model, producing frequency by single-chip microcomputer IC1 is the pwm pulse of 100KHZ, and pulse is after drive circuit IC2 amplifies, and control single-ended flyback translation circuit is worked.Before the HID lamp starts, the VD of single-ended flyback translation circuit is controlled at about 380V, this moment is by the VD and the output current of single-chip microcomputer IC1 continuous detecting 12V DC input voitage, single-ended flyback translation circuit, as find that input voltage is less than 9V or greater than 16V, perhaps output current is excessive, perhaps after the single-ended flyback translation circuit is started working 10mS, its output voltage is still greater than 300V, then single-chip microcomputer IC1 stops to produce the pwm pulse of 100KHZ immediately, and the HID lamp first time that finishes the single-ended flyback translation circuit starts; Fail as the HID lamp startup first time, then can enter startup for the second time, still fail as the HID lamp startup second time, then can enter startup for the third time, as still failure for the third time, then close translation circuit, directly only circuit re-powers.As from the foregoing, sort circuit has certain intelligence, another advantage is that the VD of single-ended flyback translation circuit is controlled at below the 400V all the time, so the back level full bridge inverter of HID lamp electronic ballast can be selected for use, and price is lower, withstand voltage to be the power MOS pipe of 400V.
Start successfully as the HID lamp, then single-chip microcomputer IC1 enters HID lamp startup transient process control and steady-state process control, real-time sampling by single-ended flyback translation circuit output current and output voltage, again after single-chip microcomputer IC1 multiplying, according to HID lamp power control curve, the PWM control impuls width of real-time regulated single-ended flyback translation circuit, thereby the permanent power output control purpose when reaching stable state.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
A kind of DC transfer circuit includes single chip machine controlling circuit, pwm power drive circuit, single-ended flyback translation circuit, output sampling circuit, signal conditioning circuit.
As shown in Figure 1, single chip machine controlling circuit comprises single-chip microcomputer IC1, three terminal regulator V1, the first input voltage sample resistance R1, the second input voltage sample resistance R2, the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3, the 4th filter capacitor C4 and filter inductance L1.1 pin of three terminal regulator V1 is by filter inductance L1 and DC input voitage 12V positive pole, 2 pin ground connection, 3 pin are+the 5V power output end, are connected with 2 pin by the 4th filter capacitor C4, and the two ends of filter inductance L1 are connected with the end of the first filter capacitor C1 and the end of the second filter capacitor C2 respectively; The end of the first input voltage sample resistance R1 is connected with 1 pin of three terminal regulator V1, the other end is connected the other end ground connection of the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 with the end of the second input voltage sample resistance R2 and the end of the 3rd filter capacitor C3.3 pin of single-chip microcomputer IC1 are connected with 3 pin of three terminal regulator V1,5 pin are connected with the other end of the first input voltage sample resistance R1,4 pin ground connection.C1, C2 and L1 constitute filter network, and right+12V input power supply carries out filtering; R1, R2 and C3 constitute the DC input voitage sample circuit; Three terminal regulator V1 act as single-chip microcomputer IC1 and signal conditioning circuit provides+the 5V power supply.
The PWM drive circuit comprises drive circuit IC2 and grid current-limiting resistance R6.7 pin of drive circuit IC2 are connected with 1 pin of three terminal regulator V1, and 4 pin are connected with 6 pin of single-chip microcomputer IC1, and 6 pin are connected with the end of grid current-limiting resistance R6,2 pin, 3 pin and 5 pin ground connection.The effect of drive circuit is the pulse signal that single-chip microcomputer IC1 produces to be carried out voltage and current amplify, thereby reduces the switching loss of power MOS pipe M1; 6 grid metering functions of resistance R, protection metal-oxide-semiconductor M1 and drive circuit IC2 because of moment overcurrent damage.
The single-ended flyback translation circuit comprises high frequency transformer T1, power MOS pipe M1, rectifier diode D1, high-frequency filter capacitor C10, absorbs capacitor C 9.One end on the former limit of high frequency transformer T1 is connected with 1 pin of three terminal regulator V1, the other end is connected with the drain electrode of power MOS pipe M1, and an end of high frequency transformer T1 secondary is connected other end ground connection with the positive pole of rectifier diode D1; The grid of power MOS pipe M1 is connected with the other end of grid current-limiting resistance R6, source ground; An end that absorbs capacitor C 9 is connected with the drain electrode of power MOS pipe M1, other end ground connection; The end of high-frequency filter capacitor C10 is connected with the negative pole of rectifier diode D1, other end ground connection.C9 is connected across D, the S two ends of metal-oxide-semiconductor M1, avoids metal-oxide-semiconductor M1 switch moment breakdown; Desirable 1: 7 of the former secondary turn ratio of high frequency transformer T1.
Output sampling circuit comprises the first output voltage sample resistance R7, the second output voltage sample resistance R8, the 3rd output voltage sample resistance R9, the 4th output voltage sample resistance R10 and current sampling resistor R11.The first output voltage sample resistance R7, the second output voltage sample resistance R8 are connected with the negative pole of rectifier diode D1 with a end after the 3rd output voltage sample resistance R9 connects successively, the other end is connected the end ground connection of the other end of the 4th output voltage sample resistance R10 and current sampling resistor R11 with the end of the 4th output voltage sample resistance R10.After R7, R8, R9, the R10 series connection dividing potential drop, be used for the output voltage sampling, resistance R 11 is used for the output current sampling.
Signal conditioning circuit comprises operational amplifier IC3, in-phase input end resistance R 3, inverting input resistance R 4, feedback resistance R5, the 5th filter capacitor C5, the 6th filter capacitor C6, the 7th filter capacitor C7 and the 8th filter capacitor C8.Operational amplifier IC3 connects+5V power supply, 4 pin ground connection.The end of the 5th filter capacitor C5 is connected the other end ground connection of the 5th filter capacitor C5 with 6 pin of single-chip microcomputer IC1, the end of feedback resistance R5,1 pin of operational amplifier IC3 respectively; One end of inverting input resistance R 4 is connected the other end ground connection of inverting input resistance R 4 with the other end of feedback resistance R5 and 2 pin of operational amplifier IC3 respectively; One end of in-phase input end resistance R 3 is connected with the other end of current sampling resistor R11, and the other end of in-phase input end resistance R 3 is connected the other end ground connection of the 6th filter capacitor C6 with the end of the 6th filter capacitor C6 and 3 pin of operational amplifier IC3 respectively; The end of the 7th filter capacitor C7 is connected the other end ground connection of the 7th filter capacitor C7 with 7 pin of 6 pin, 7 pin and the single-chip microcomputer IC1 of operational amplifier IC3 respectively; The end of the 8th filter capacitor C8 is connected the other end ground connection of the 8th filter capacitor C8 with 5 pin of operational amplifier IC3 and the end of the 4th output voltage sample resistance R10 respectively.No. one amplifier constitutes emitter voltage follower among the operational amplifier IC3; Another road amplifier and resistance R 4, R5 constitute in-phase amplifier, and the output current sampled signal is amplified.
The course of work of the utility model circuit:
Behind the 12V power connection, produce the PWM control impuls of 100KHZ by the single-chip microcomputer IC1 of band A/D converter and PWM module, the metal-oxide-semiconductor M1 break-make of control single-ended flyback converter behind power driving circuit IC2, the high-frequency ac voltage that the high frequency transformer secondary produces is after diode D1 rectification, the formation direct voltage is an electric, and output dc voltage and electric current are behind resistance sampling, through signal conditioning circuit, feed back to the A/D input channel of single-chip microcomputer IC1, by single-chip microcomputer IC1 VD and electric current are carried out multiplying then, according to the size adjustment PWM value of this power output, thereby reach the purpose of output constant power control.This in addition DC transfer circuit has output open circuit, output short-circuit, output overcurrent, input is under-voltage and kinds of protect function such as input overvoltage etc., and soft start capacity, has higher reliability.
Claims (1)
1, a kind of DC transfer circuit comprises single chip machine controlling circuit, pwm power drive circuit, single-ended flyback translation circuit, output sampling circuit, signal conditioning circuit, it is characterized in that:
Single chip machine controlling circuit comprises single-chip microcomputer IC1, three terminal regulator V1, the first input voltage sample resistance R1, the second input voltage sample resistance R2, the first filter capacitor C1, the second filter capacitor C2, the 3rd filter capacitor C3, the 4th filter capacitor C4 and filter inductance L1; 1 pin of three terminal regulator V1 passes through filter inductance L1 and DC input voitage 12V positive pole, 2 pin ground connection, and 3 pin are+the 5V power output end that 3 pin are connected with 2 pin by the 4th filter capacitor C4; The two ends of filter inductance L1 are connected with the end of the first filter capacitor C1 and the end of the second filter capacitor C2 respectively; The end of the first input voltage sample resistance R1 is connected with 1 pin of three terminal regulator V1, the other end is connected the other end ground connection of the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 with the end of the second input voltage sample resistance R2 and the end of the 3rd filter capacitor C3; 3 pin of single-chip microcomputer IC1 are connected with 3 pin of three terminal regulator V1,5 pin are connected with the other end of the first input voltage sample resistance R1,4 pin ground connection;
The pwm power drive circuit comprises drive circuit IC2 and grid current-limiting resistance R6; 7 pin of drive circuit IC2 are connected with 1 pin of three terminal regulator V1, and 4 pin are connected with 6 pin of single-chip microcomputer IC1, and 6 pin are connected with the end of grid current-limiting resistance R6,2 pin, 3 pin and 5 pin ground connection;
The single-ended flyback translation circuit comprises high frequency transformer T1, power MOS pipe M1, rectifier diode D1, high-frequency filter capacitor C10, absorbs capacitor C 9; One end on the former limit of high frequency transformer T1 is connected with 1 pin of three terminal regulator V1, the other end is connected with the drain electrode of power MOS pipe M1, and an end of high frequency transformer T1 secondary is connected other end ground connection with the positive pole of rectifier diode D1; The grid of power MOS pipe M1 is connected with the other end of grid current-limiting resistance R6, source ground; An end that absorbs capacitor C 9 is connected with the drain electrode of power MOS pipe M1, other end ground connection; The end of high-frequency filter capacitor C10 is connected with the negative pole of rectifier diode D1, other end ground connection;
Output sampling circuit comprises the first output voltage sample resistance R7, the second output voltage sample resistance R8, the 3rd output voltage sample resistance R9, the 4th output voltage sample resistance R10 and current sampling resistor R11; The first output voltage sample resistance R7, the second output voltage sample resistance R8 are connected with the negative pole of rectifier diode D1 with a end after the 3rd output voltage sample resistance R9 connects successively, the other end is connected the end ground connection of the other end of the 4th output voltage sample resistance R10 and current sampling resistor R11 with the end of the 4th output voltage sample resistance R10;
Signal conditioning circuit comprises operational amplifier IC3, in-phase input end resistance R 3, inverting input resistance R 4, feedback resistance R5, the 5th filter capacitor C5, the 6th filter capacitor C6, the 7th filter capacitor C7 and the 8th filter capacitor C8; Operational amplifier IC3 connects+5V power supply, 4 pin ground connection; The end of the 5th filter capacitor C5 is connected the other end ground connection of the 5th filter capacitor C5 with 6 pin of single-chip microcomputer IC1, the end of feedback resistance R5,1 pin of operational amplifier IC3 respectively; One end of inverting input resistance R 4 is connected the other end ground connection of inverting input resistance R 4 with the other end of feedback resistance R5 and 2 pin of operational amplifier IC3 respectively; One end of in-phase input end resistance R 3 is connected with the other end of current sampling resistor R11, and the other end of in-phase input end resistance R 3 is connected the other end ground connection of the 6th filter capacitor C6 with the end of the 6th filter capacitor C6 and 3 pin of operational amplifier IC3 respectively; The end of the 7th filter capacitor C7 is connected the other end ground connection of the 7th filter capacitor C7 with 7 pin of 6 pin, 7 pin and the single-chip microcomputer IC1 of operational amplifier IC3 respectively; The end of the 8th filter capacitor C8 is connected the other end ground connection of the 8th filter capacitor C8 with 5 pin of operational amplifier IC3 and the end of the 4th output voltage sample resistance R10 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201707490U CN201332531Y (en) | 2008-12-25 | 2008-12-25 | DC (direct current) converting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201707490U CN201332531Y (en) | 2008-12-25 | 2008-12-25 | DC (direct current) converting circuit |
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| CN201332531Y true CN201332531Y (en) | 2009-10-21 |
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| CNU2008201707490U Expired - Fee Related CN201332531Y (en) | 2008-12-25 | 2008-12-25 | DC (direct current) converting circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873749A (en) * | 2010-06-25 | 2010-10-27 | 海洋王照明科技股份有限公司 | Power conversion circuit and LED drive circuit |
| CN103722277A (en) * | 2014-01-03 | 2014-04-16 | 国家电网公司 | Direct current arc welding machine |
| CN109884961A (en) * | 2019-04-03 | 2019-06-14 | 佛山市迪趣智能科技有限公司 | A kind of control circuit of vehicle-mounted ozone generator |
| CN111130354A (en) * | 2019-12-30 | 2020-05-08 | 洛阳隆盛科技有限责任公司 | High-voltage power supply with linear relation between output voltage and control voltage |
-
2008
- 2008-12-25 CN CNU2008201707490U patent/CN201332531Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101873749A (en) * | 2010-06-25 | 2010-10-27 | 海洋王照明科技股份有限公司 | Power conversion circuit and LED drive circuit |
| CN101873749B (en) * | 2010-06-25 | 2014-01-15 | 海洋王照明科技股份有限公司 | Power conversion circuit and LED drive circuit |
| CN103722277A (en) * | 2014-01-03 | 2014-04-16 | 国家电网公司 | Direct current arc welding machine |
| CN103722277B (en) * | 2014-01-03 | 2015-10-28 | 国家电网公司 | A kind of DC arc welding machine |
| CN109884961A (en) * | 2019-04-03 | 2019-06-14 | 佛山市迪趣智能科技有限公司 | A kind of control circuit of vehicle-mounted ozone generator |
| CN111130354A (en) * | 2019-12-30 | 2020-05-08 | 洛阳隆盛科技有限责任公司 | High-voltage power supply with linear relation between output voltage and control voltage |
| CN111130354B (en) * | 2019-12-30 | 2023-06-13 | 洛阳隆盛科技有限责任公司 | High-voltage power supply with output voltage and control voltage in linear relation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20121225 |