CN105099229A - High-voltage switch power supply - Google Patents
High-voltage switch power supply Download PDFInfo
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- CN105099229A CN105099229A CN201510534411.3A CN201510534411A CN105099229A CN 105099229 A CN105099229 A CN 105099229A CN 201510534411 A CN201510534411 A CN 201510534411A CN 105099229 A CN105099229 A CN 105099229A
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Abstract
The invention discloses a high-voltage switch power supply. The input of a rectifier and filter circuit is connected with the output of a surge current limiting unit; the output of the rectifier and filter circuit is connected with the input of a direct current-direct current (DC-DC) circuit; the output of the DC-DC is connected with the input of an inverter circuit; the output of the inverter circuit is connected with the input of a high-frequency transformer; the output of the high-frequency transformer is connected with the input of a voltage-doubling rectifier circuit; the voltage-doubling rectifier circuit outputs required high-voltage direct-current voltage; a voltage collection feedback unit collects output voltage, processes the output voltage and then transmits the output voltage to a master control chip; the master control chip is respectively connected with the surge current limiting unit, the DC-DC circuit and the inverter circuit to control the three parts; the master control chip is also connected with an output end of an auxiliary power supply module, and is supplied with electricity by the auxiliary power supply module; and the input of the auxiliary power supply module is connected with an external power supply.
Description
Technical field:
The present invention relates to a kind of high-voltage switch power supply.
Background technology:
Conventional high-tension power supply mostly is linear power supply, adopts power frequency transformation, requires higher to capacitor, inductor, transformer.In recent years, along with the development of power electronics new unit, switch power technology can be applicable to high voltage source, it closes the height of regulation output voltage by the conducting of PWM ripple control switch device, inverter circuit is adopted to improve the operating frequency of transformer, meanwhile, Switching Power Supply also greatly reduces volume and the weight of device.But export on PWM waveform in control, current many employings analogue type power supply chip as specific in UC3525, TL494 etc., these chips can produce excessive departure by the impact of temperature drift or aging phenomenon, and control precision decreases.Dsp chip is with fast operation, the advantage such as precision is high, antijamming capability is strong in Electric Machine Control, and the fields such as Electric Drive are widely applied.The high voltagehigh frequency Switching Power Supply controlled based on DSP can improve the control precision of Energy control device fast with control greatly, can estimate the development along with Switching Power Supply high frequency, dsp chip will become the mainstream chip controlling high voltage source.
Summary of the invention:
The object of the invention is to limit the surge current produced instantaneously after high-voltage switch power supply switches on power, simultaneously by using a slice dsp chip as the control unit of this high-voltage switch power supply, greatly reducing the complexity of control, thus simplifying hardware circuit; By the control regulating the voltage of DC-DC circuit to export the direct voltage output size realized final Switching Power Supply; Adopt two-way voltage-multiplying circuit to greatly reduce the boosting multiple of the high frequency transformer in circuit in previous stage, thus reduce the manufacture difficulty of high frequency transformer.
The present invention adopts following Technology design:
A kind of high-voltage switch power supply, comprising: the limit inrush currents circuit that surge current during for being just energized to circuit limits, and the input of limit inrush currents circuit connects single phase industrial frequence alternating current, and output connects the input of current rectifying and wave filtering circuit; The output of current rectifying and wave filtering circuit is connected with the input of DC-DC regulating circuit, and the output of DC-DC regulating circuit is connected with the input of inverter circuit; The output of inverter circuit is connected with the former limit of high frequency transformer, and the secondary of high frequency transformer is connected with the input of voltage doubling rectifing circuit; High-voltage DC power supply needed for voltage doubling rectifing circuit exports.Wherein, DC-DC regulating circuit adopts Buck circuit, inverter circuit full bridge inverter.
Further, it also comprises a slice DSP control chip, and model is the TMS320F28335 that American TI Company is produced, and surge with restriction respectively current unit module, DC-DC regulating circuit, inverter circuit of DSP control chip is connected.
Further, it also comprises voltage sample feedback unit, and the input of voltage sample feedback unit connects the output of voltage doubling rectifing circuit, and output is connected with DSP control chip.
Further, it also comprises auxiliary power module, and the input of auxiliary power module connects single phase industrial frequence alternating current, and output connects DSP control chip, for powering to control chip.
Further, described limit inrush currents unit is by a relay and a thermistor parallel connection, relay is controlled by DSP control chip, when being just energized, can produce surge current in circuit, now relay switch is opened, thermistor series connection in circuit, when after 0.3 ~ 0.5s, relay closing relay under DSP control chip controls makes thermistor short circuit, thus reaches the object of dual limit inrush currents.
As improvement, described voltage doubling rectifing circuit adopts two-way voltage-multiplying circuit, and by two four voltage-multiplying circuit series connection, transformer is placed on the centre of four voltage-multiplying circuits of two series connection.
Accompanying drawing illustrates:
Fig. 1 is the circuit block diagram of a kind of high-voltage direct current switch power supply of the present invention.
Fig. 2 is the circuit theory diagrams of two-way voltage-multiplying circuit.
Embodiment:
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail.
As shown in Figure 1, a kind of high-voltage switch power supply, it comprises: the limit inrush currents circuit that surge current during for being just energized to circuit limits, and the input of limit inrush currents circuit connects single phase industrial frequence alternating current, and output connects the input of current rectifying and wave filtering circuit; The output of current rectifying and wave filtering circuit is connected with the input of DC-DC regulating circuit, and the output of DC-DC regulating circuit is connected with the input of inverter circuit; The output of inverter circuit is connected with the former limit of high frequency transformer, and the secondary of high frequency transformer is connected with the input of voltage doubling rectifing circuit; High-voltage DC power supply needed for voltage doubling rectifing circuit exports.The input of voltage sample feedback unit connects the output of voltage doubling rectifing circuit, and the output of voltage sample feedback unit connects DSP control chip; DSP control chip is connected with limit inrush currents circuit, DC-DC circuit, inverter circuit again respectively, is respectively used to control this three circuit; The TMS320F28335 model that dsp chip adopts American TI Company to produce; The power supply of DSP control chip is provided by auxiliary power module, and the input of auxiliary power module connects outside single phase industrial frequence alternating current, and output is connected with DSP control chip.
Limit inrush currents unit is by a relay and a thermistor parallel connection, relay is controlled by DSP control chip, when being just energized, surge current can be produced in circuit, now relay switch is opened, and thermistor is connected in circuit, when after 0.3 ~ 0.5s, relay closing relay under DSP control chip controls makes thermistor short circuit, thus reaches the object of dual limit inrush currents.
DSP control chip controls limit inrush currents circuit, DC-DC (Buck) circuit, full bridge inverter simultaneously.DSP control chip is by controlling the break-make of the relay of limit inrush currents circuit thus reaching the object of limit inrush currents; DSP control chip is connected with the MOSFET of Buck circuit, by the output voltage regulating the duty ratio of the PWM ripple produced to remove regulating circuit; DSP control chip removes four IGBT driving full bridge inverter respectively, and arrange fixing PWM duty ratio, thus effectively produce high frequency square wave voltage, set of frequency is 50KHz.
As shown in Figure 2, as a further improvement on the present invention, voltage doubling rectifing circuit adopts two-way voltage doubling rectifing circuit, and by two four voltage-multiplying circuit series connection, transformer puts centre, can effectively reduce out-put supply ripple like this, improves voltage stability.
Claims (4)
1. a high-voltage switch power supply, it is characterized in that, it comprises: the limit inrush currents circuit that surge current during for being just energized to circuit limits, and the input of limit inrush currents circuit connects single phase industrial frequence alternating current, and output connects the input of current rectifying and wave filtering circuit; The output of current rectifying and wave filtering circuit is connected with the input of DC-DC regulating circuit, and the output of DC-DC regulating circuit is connected with the input of inverter circuit; The output of inverter circuit is connected with the former limit of high frequency transformer, and the secondary of high frequency transformer is connected with the input of voltage doubling rectifing circuit; High-voltage DC power supply needed for voltage doubling rectifing circuit exports.
2. a kind of high-voltage switch power supply according to claim 1, it is characterized in that: it also comprises a slice DSP control chip, model is TMS320F28335, surge with restriction respectively current circuit, DC-DC regulating circuit, inverter circuit of DSP control chip is connected, and goes respectively to control this three circuit.
3. a kind of high-voltage switch power supply according to claim 1, is characterized in that: it also comprises voltage sample feedback unit, and the input of voltage sample feedback unit connects the output of voltage doubling rectifing circuit, and output is connected with DSP control chip.
4. a kind of high-voltage switch power supply according to claim 1, is characterized in that: voltage doubling rectifing circuit adopts two-way voltage-multiplying circuit, by two four voltage-multiplying circuit series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510534411.3A CN105099229A (en) | 2015-08-25 | 2015-08-25 | High-voltage switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510534411.3A CN105099229A (en) | 2015-08-25 | 2015-08-25 | High-voltage switch power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105099229A true CN105099229A (en) | 2015-11-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510534411.3A Pending CN105099229A (en) | 2015-08-25 | 2015-08-25 | High-voltage switch power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429482A (en) * | 2015-12-21 | 2016-03-23 | 西安航天动力研究所 | High-voltage direct current power supply applied to dust removal system |
| CN108365762A (en) * | 2018-01-30 | 2018-08-03 | 安徽省金屹电源科技有限公司 | A kind of use in washing machine sterilizer power source special |
| CN111624452A (en) * | 2020-05-14 | 2020-09-04 | 广东电网有限责任公司 | High-voltage generator for insulation test of distribution cable |
-
2015
- 2015-08-25 CN CN201510534411.3A patent/CN105099229A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429482A (en) * | 2015-12-21 | 2016-03-23 | 西安航天动力研究所 | High-voltage direct current power supply applied to dust removal system |
| CN108365762A (en) * | 2018-01-30 | 2018-08-03 | 安徽省金屹电源科技有限公司 | A kind of use in washing machine sterilizer power source special |
| CN111624452A (en) * | 2020-05-14 | 2020-09-04 | 广东电网有限责任公司 | High-voltage generator for insulation test of distribution cable |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |
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| WD01 | Invention patent application deemed withdrawn after publication |