CN205265535U - High -voltage direct current power supply - Google Patents
High -voltage direct current power supply Download PDFInfo
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- CN205265535U CN205265535U CN201521144647.8U CN201521144647U CN205265535U CN 205265535 U CN205265535 U CN 205265535U CN 201521144647 U CN201521144647 U CN 201521144647U CN 205265535 U CN205265535 U CN 205265535U
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Abstract
The utility model discloses a high -voltage direct current power supply, including alternating current 220V input, input rectifier module, high -frequency transformer, output rectifier module, high voltage direct current output, sample feedback module and PWM pulsewidth modulation module, the high voltage direct current output is connected through input rectifier module connection high -frequency transformer's input, high -frequency transformer's output through output rectifier module to the alternating current 220V input, and the high voltage direct current output is connected with PWM pulsewidth modulation module through the feedback module that takes a sample, and PWM pulsewidth modulation module is connected with high -frequency transformer's input. The utility model discloses simple structure has advantages such as stability is good, response speed is fast, and the ability wide application is in accurate electronic system such as copier, medical instrument.
Description
Technical field
The utility model belongs to high-voltage DC power supply technical field, is specifically related to a kind of high-voltage DC power supply.
Background technology
High-voltage DC power supply is widely used in various precise electronic systems, and it requires power-supply system to have lightweight, responseSpeed is fast, good stability, reliability high. For the above-mentioned requirement that meets precise electronic system, need a kind of newType high-voltage switch power supply. This power supply has the advantage such as good stability, fast response time, can be widely used in copier,In the precise electronic systems such as medical instrument.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of high-voltage DC power supply is provided.
The utility model is achieved through the following technical solutions:
A kind of high-voltage DC power supply, comprises alternating current 220V input, input rectifying filtration module, high frequency transformer, outputRectification filtering module, HVDC output end, sampling feedback module and PWM pulse width modulation module; Alternating current 220V inputEnd connects the input of high frequency transformer by input rectifying filtration module, the output of high frequency transformer is by output rectificationFiltration module connects HVDC output end, and HVDC output end is by sampling feedback module and PWM pulsewidth modulation mouldPiece connects, and PWM pulse width modulation module is connected with the input of high frequency transformer.
In technique scheme, described PWM pulse width modulation module comprises that a model is the PWM modulator of SG3524,11 pin of SG3524 are with 14 pin and after connecing, be connected the grid of MOS power tube VT by resistance R 3, power tube VT'sDrain electrode is connected the primary coil of high frequency transformer with source electrode, and the drain electrode of power tube VT connects inductance L.
In technique scheme, power supply signal arrival end 15 shunt capacitance C2, the C1 of SG3524 forms soft openingMoving circuit.
In technique scheme, input rectifying filtration module comprises, capacitor C 6, the diode VD2 connecting with capacitor C 6,The resistance R 7 in parallel with diode VD2.
In technique scheme, sampling feedback module comprises resistance R 8, resistance R 9, slide rheostat Rw, resistanceR8, resistance R 9, slide rheostat Rw connect with HVDC output end as voltage sampling feedback resistance.
Advantage of the present utility model and beneficial effect are:
The utility model is simple in structure, has the advantage such as good stability, fast response time, can be widely used in copier,In the precise electronic systems such as medical instrument.
Brief description of the drawings
Fig. 1 is circuit principle structure block diagram of the present utility model.
Fig. 2 is the circuit diagram of PWM pulse width modulation module of the present utility model.
Fig. 3 is input rectifying filtration module of the present utility model, high frequency transformer, output rectification filter module, high voltage directCircuit connection diagram between stream output, sampling feedback module and PWM pulse width modulation module.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with specific embodiment.
As shown in Figure 1, a kind of high-voltage DC power supply that the utility model is related, comprises alternating current 220V input, inputRectification filtering module, high frequency transformer, output rectification filter module, HVDC output end, sampling feedback module and PWMPulse width modulation module; Alternating current 220V input connects the input of high frequency transformer, high frequency by input rectifying filtration moduleThe output of transformer connects HVDC output end by output rectification filter module, and HVDC output end is by samplingFeedback module is connected with PWM pulse width modulation module, and PWM pulse width modulation module is connected with the input of high frequency transformer.
The electric main of 220V after input rectifying filtration module rectifying and wave-filtering with the output signal of PWM pulse width modulation moduleDrive together high frequency transformer, export by high frequency transformer high voltage source filter through the rectification of output rectification filter module againAfter ripple, from HVDC output end output high direct voltage; Sample feedback module simultaneously HVDC output end is carried out to voltageSignals collecting, and by gather signal feedback to PWM pulse width modulation module, by with PWM pulse width modulation module inThe reference voltage comparison of error amplifier, the output duty cycle of control impuls modulator, with regulation output voltage.
As shown in Figure 2, described PWM pulse width modulation module comprises that a model is the PWM modulator of SG3524, SG3524Power supply signal arrival end 15 shunt capacitance C2, C1 form a soft starting circuit, design soft starting circuit object bePrevent that the super-high-current producing from impacting chip in the time that power supply is opened suddenly. In the time of just energising, electric capacity both end voltage is notCan suddenly change, its voltage raises to its charging gradually with external power source, and through after a period of time, circuit enters normal workMake state. Ensure that like this input voltage sets up lentamente, guaranteed that chip is not damaged; 9 pin of SG3524 successivelySeries resistance R5 and capacitor C 4 ground connection, 8 pin of SG3524 and 6 pin ground connection, the 16 pin series capacitance C3 of SG3524Ground connection, the 2 pin series resistance R1 ground connection of SG3524, are connected with resistance R 2, SG3524 between 16 pin of SG3524 and 2 pin7 pin series capacitance C5 ground connection, 11 pin of SG3524 are connected MOS power tube with 14 pin and after connecing by resistance R 3The grid of VT, and the grid of VT is by resistance R 4 ground connection; Because power tube is to work to produce under high frequency state to shakeSwing, in order to eliminate this unwanted oscillation, should reduce wire length, particularly grid lead with the each pin of power tube as far as possibleLength, if cannot reduce its length, the small resistor of can connecting, and as far as possible near pipe grid, in Fig. 2, R3 is meritThe grid current-limiting resistance of rate pipe, the unwanted oscillation producing eliminate again power tube work together with R4 time;
As shown in Figure 3, the drain electrode of power tube VT is connected the primary coil of high frequency transformer with source electrode, and power tube VTDrain electrode connects inductance L, and power tube VT is by the signal driver from SG3524 chip, when 11 and 14 pin of SG3524When output high level, power tube conducting, and energy storage in inductance L; When the 11 and 14 pin output low levels of SG3524Time, power tube VT cut-off, the electric current that causes flowing through in inductance L drops to suddenly zero, L generation back-emf, and this is electricity insteadThe pulse voltage of gesture is added in the input of high frequency transformer, drives high frequency transformer work, and meanwhile, inductance L is made transformerImpedance matching element; In figure 3, capacitor C 6, the diode VD2 connecting with capacitor C 6, in parallel with diode VD2Resistance R 7 form input rectifying filtration module; Diode VD3, the diode VD4 of the out-secondary of high frequency transformerForm output rectification filter module with capacitor C 7, the alternating voltage of being exported by high frequency transformer is through diode VD3, VD4Carry out after rectification and voltage multiplier, then through C7 filtering, obtain HVDC output;
R8, R9, Rw connect with HVDC output end as voltage sampling feedback resistance, and sampling voltage is from SG35241 pin input of chip, controls dutycycle, and then regulation output voltage, reaches the object of voltage stabilizing. Its principle of stabilized voltage is:If output voltage is higher, the signal of sampling feedback is also higher, with the reference voltage of error amplifier in SG3524 relatively afterLow voltage, cause the narrowed width of dutycycle, cause that output voltage declines; Vice versa. Rw is slide rheostat,By regulating Rw to carry out regulation output voltage.
Above the utility model is done to exemplary description, should be noted that and do not departing from core of the present utility modelSituation under, any simple distortion, amendment or other those skilled in the art can not spend creative work etc.All fall into protection domain of the present utility model with replacement.
Claims (5)
1. a high-voltage DC power supply, is characterized in that: comprise alternating current 220V input, input rectifying filtration module,High frequency transformer, output rectification filter module, HVDC output end, sampling feedback module and PWM pulsewidth modulation mouldPiece; Alternating current 220V input connects the input of high frequency transformer by input rectifying filtration module, high frequency transformer defeatedGo out end and connect HVDC output end by output rectification filter module, HVDC output end by sampling feedback module withPWM pulse width modulation module connects, and PWM pulse width modulation module is connected with the input of high frequency transformer.
2. high-voltage DC power supply according to claim 1, is characterized in that: described PWM pulse width modulation module bagDrawing together a model is the PWM modulator of SG3524, and 11 pin of SG3524 are connected by resistance R 3 with 14 pin and after connecingThe grid of power tube VT, the drain electrode of power tube VT is connected the primary coil of high frequency transformer with source electrode, and power tube VTDrain electrode connect inductance L.
3. high-voltage DC power supply according to claim 1, is characterized in that: the power supply signal arrival end of SG3524Shunt capacitance C2, C1.
4. high-voltage DC power supply according to claim 1, is characterized in that: input rectifying filtration module comprises, electricityHold C6, the diode VD2 connecting with capacitor C 6, the resistance R 7 in parallel with diode VD2.
5. high-voltage DC power supply according to claim 1, is characterized in that: sampling feedback module comprise resistance R 8,Resistance R 9, slide rheostat Rw, resistance R 8, resistance R 9, slide rheostat Rw are as voltage sampling feedback resistanceConnect with HVDC output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521144647.8U CN205265535U (en) | 2015-12-31 | 2015-12-31 | High -voltage direct current power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521144647.8U CN205265535U (en) | 2015-12-31 | 2015-12-31 | High -voltage direct current power supply |
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| CN205265535U true CN205265535U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521144647.8U Active CN205265535U (en) | 2015-12-31 | 2015-12-31 | High -voltage direct current power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490570A (en) * | 2015-12-31 | 2016-04-13 | 天津铭锐创科技有限公司 | High-voltage switching power supply |
| CN108258924A (en) * | 2017-12-29 | 2018-07-06 | 河南北瑞电子科技有限公司 | A kind of high-voltage DC power supply |
-
2015
- 2015-12-31 CN CN201521144647.8U patent/CN205265535U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490570A (en) * | 2015-12-31 | 2016-04-13 | 天津铭锐创科技有限公司 | High-voltage switching power supply |
| CN108258924A (en) * | 2017-12-29 | 2018-07-06 | 河南北瑞电子科技有限公司 | A kind of high-voltage DC power supply |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 2100-C1008, Huatian Road, Huayuan Industrial Zone, Tianjin Binhai New Area, 300384 Patentee after: Tianjin Mingruichuang Technology Co., Ltd. Address before: Room 2100-C1008, Huatian Road, Huayuan Industrial Zone, Tianjin Binhai New Area, 300384 Patentee before: TIANJIN MINGRUICHUANG TECHNOLOGY CO., LTD. |