CN206962712U - A kind of adjustable DC high voltage power supply - Google Patents
A kind of adjustable DC high voltage power supply Download PDFInfo
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- CN206962712U CN206962712U CN201720591341.XU CN201720591341U CN206962712U CN 206962712 U CN206962712 U CN 206962712U CN 201720591341 U CN201720591341 U CN 201720591341U CN 206962712 U CN206962712 U CN 206962712U
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Abstract
This programme proposes a kind of adjustable DC high voltage power supply,Including low-voltage dc power supply,LC filter circuits,Transformer coupled power amplifying circuit,Voltage doubling rectifing circuit,HVDC exports end,The low-voltage dc power supply is followed by transformer coupled power amplifying circuit through LC filter circuits,Transformer coupled power amplifying circuit is connected with voltage doubling rectifing circuit,Voltage doubling rectifing circuit output end connects DC high-voltage output end,Described adjustable DC high voltage power supply also includes feedback control circuit,The feedback control circuit includes sampling backfeed loop,Control circuit and pulse-width modulation circuit,The control circuit controls pulse-width modulation circuit to control the voltage of the DC high-voltage output end,The sampling feedback loop input connection DC high-voltage output end,Output end connects pulse-width modulation circuit,Pulse-width modulation circuit controls transformer coupled power amplifying circuit by FET.It is good with output stability.The technological merit having a wide range of application.
Description
Technical field
The utility model is related to high voltage power supply technical field, and in particular to a kind of adjustable DC high voltage power supply.
Background technology
DC high-voltage power supply is widely used to all trades and professions, and DC high-voltage power supply has reliable and stable, efficiency high, volume
The advantages that small.The input of Traditional DC high voltage power supply is mainly civil power and entered by the way of the mechanical pressure regulation of power frequency pressure regulator
Row pressure regulation and then output acquisition HVDC, because power network fluctuation is big, and the factor such as unstability of civil power alternating current, make
Obtaining the high voltage direct current that conventional art obtains has the shortcomings that error is big, efficiency is low, unstable.Meanwhile civil power input is rectified
Filtering can produce higher input voltage, reduce the design difficulty of DC high-voltage power supply, but because precision instrument is steady for voltage
Qualitatively high performance requirements, the high voltage direct current that civil power conversion obtains just seem less suitable for accurate compact portable set
With.And Traditional DC high voltage power supply even multiple-channel output, one side output voltage limited amount, another aspect multiple-channel output
The design of transformer is also comparatively laborious in circuit, can not meet the electronic system of a variety of high pressure level demands, especially various essences
In close electronic instrument, based on this, it is necessary to study a kind of mode of the stronger acquisition high voltage direct current of stability, meet actual production
Product application demand.
The content of the invention
The utility model aims to solve the problem that the deficiency of conventional art, there is provided a kind of DC high-voltage of output voltage continuously adjustabe
Source system, the power-supply system can be widely applied to using Portable low-voltage DC source powered stable, dependable performance, small volume
In the instrument of all kinds of electronic systems, especially reliable and stable high direct voltage is provided for accurate portable electronics and power instrument.
This programme proposes a kind of adjustable DC high voltage power supply, including low-voltage dc power supply as power input, LC filters
Wave circuit, transformer coupled power amplifying circuit, voltage doubling rectifing circuit, HVDC output end, the low-voltage dc power supply warp
LC filter circuits are followed by transformer coupled power amplifying circuit, and transformer coupled power amplifying circuit is connected with voltage doubling rectifing circuit
Connect, voltage doubling rectifing circuit output end connection DC high-voltage output end, described adjustable DC high voltage power supply also includes feedback control
Circuit, the feedback control circuit include sampling backfeed loop, control circuit and pulse-width modulation circuit, the control circuit control
For pulse-width modulation circuit to control the voltage of the DC high-voltage output end, the sampling feedback loop input connects high direct voltage
Output end, output end connection pulse-width modulation circuit, pulse-width modulation circuit control transformer coupled power to amplify by FET
Circuit.
Further scheme, the pulse-width modulation circuit include model UC1856-SP PWM controller.
Further scheme, the transformer coupled power amplifying circuit include bridge push pull power amplification circuit.
Further scheme, the transformer coupled power amplifying circuit include pulse transformer T1, the pulse transforming
Device T1 is high frequency transformer, and the pulse transformer T1 primary coils are 30 circles, and subgrade coil N2 and N3 are 30 circles.
Further scheme, the transformer coupled power amplifying circuit also include high-tension transformer T2, the high voltage variable
Depressor T2 is high frequency transformer, and high-tension transformer T2 the primary coils N4 and N5 are 8 circles, and subgrade coil N6 is 800 circles.
Further scheme, the voltage doubling rectifing circuit are four voltage-multiplying circuits, including high-voltage capacitance and the pole of high-voltage rectifying two
Pipe.
Further scheme, the feedback control circuit also include current foldback circuit, the current foldback circuit and arteries and veins
Wide modulation circuit connection.
This programme has the beneficial effect that：
1st, compared with prior art, the power supply is using low-voltage dc power supply as supplying power for input end, lifting for the utility model
The stability of whole power supply, is greatly improved precision stability and the flexibility of instrument.The use of high frequency high voltage transformer, can
The volume of power supply is greatly reduced, also improves the efficiency of power supply, from the applicability for greatly enhancing power supply.
2nd, the utility model compared with prior art, the power supply output continuously adjustabe, can under 0~5V control voltages,
Export and the linear corresponding 0~15kV high direct voltages of 0~5V.Meet the instrument demand of different voltage class, can be rear class
Power system provides diversified burning voltage.
3rd, the utility model compared with prior art, also has the double electricity of input, output with current foldback circuit, the power supply
Stream detection and corresponding overcurrent protection, it is effectively guaranteed that the stability of power supply, improve the service life of power supply.
Brief description of the drawings
Fig. 1 is the specific system control connection block diagram of the utility model；
Fig. 2 is pulse-width modulation circuit of the present utility model, transformer coupled power amplifying circuit and current-doubling rectifier electricity
Lu Tu；
Fig. 3 is the circuit diagram of pulse-width modulation circuit current foldback circuit of the present utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and specifically
Embodiment, the utility model is further elaborated.It should be appreciated that embodiment described herein is only used
To explain the utility model, it is not used to limit the utility model.As shown in figure 1, this programme proposes a kind of adjustable DC high pressure
Power supply, including the low-voltage dc power supply 1 as power input, the output end of low-voltage dc power supply 1 connect the defeated of LC filter circuits 2
Enter end, realize and ripple processing is removed to low-voltage dc power supply 1, the output end connection transformer coupled power of LC filter circuits 2 is put
The input of big circuit 3 is to realize that the conversion to voltage is amplified, the output end connection times of transformer coupled power amplifying circuit 3
Voltage rectifier 4 connects the output that HVDC output end 5 carries out high voltage direct current afterwards to carry out rectifier boost to voltage.
So realize conversion of the low-tension supply to high-voltage DC power supply.The low-voltage dc power supply 1 is followed by transformation through LC filter circuits 2
Device coupled power amplifying circuit 3, transformer coupled power amplifying circuit 3 is connected with voltage doubling rectifing circuit 4, voltage doubling rectifing circuit
4 output ends connect DC high-voltage output end 5, and described adjustable DC high voltage power supply also includes feedback control circuit 6, the feedback
Control circuit 6 includes sampling backfeed loop 62, control circuit 61 and pulse-width modulation circuit 63, and the control circuit 61 controls pulsewidth
Modulation circuit 63 is to control the output voltage of the DC high-voltage output end 5.Pulse-width modulation circuit 63 is controlled by FET
Transformer coupled power amplifying circuit 3, when needing to change the output voltage of DC high-voltage output end 5, control circuit 61 (includes
Single-chip microcomputer main control chip) can be by controlling the PWM of pulse-width modulation circuit 63 to export, and then magnification ratio is adjusted, realize different
Voltage output under situation.The sampling backfeed loop 62 input connection DC high-voltage output end 5 output end connection pulsewidth is adjusted
Circuit 63 processed, pulse-width modulation circuit 63 control transformer coupled power amplifying circuit 3 by FET.The present embodiment mesolow
Dc source 1 can use 0~5V dc sources, the voltage that the DC high-voltage output end 5 after the system pressure swing reforming exports
For 0~15kV, high pressure is defined as.
As shown in Fig. 2-Fig. 3, the pulse-width modulation circuit 63 includes model UC1856-SP PWM controller 631.UC-
1856-SP 11 pin and the square wave of 14 pin output complementation.11 pin meet Q1 in bridge push pull power amplification circuit 31 by resistance R6
With Q2 base stage, 14 pin connect the base stage of Q3 and Q4 in bridge push pull power amplification circuit 31 by resistance R7.Q1 and Q2 transmitting
Pole is connected, and Q3 is connected with Q4 emitter stage, then connects pulse transformer T132 primary coil N1 both ends respectively.On the one hand
The driving force to rear class power MOSFET (VT1 and VT2) can be increased, on the other hand, the square wave of complementation can be converted to
Positive and negative square wave, it is easy to drive the push-pull power amplifier circuit of rear class.The push-pull power amplifier circuit of rear class is using transformer coupled
Mode, the resistance to pressure request to power MOSFET can be reduced while power output is effectively improved, so as to reduce element
Cost.Pulse transformer T132 coupling bridge push pulls power amplification circuit 31 is powered using low-voltage dc power supply, can so be made
High-tension transformer exports positive or negative high voltage square wave, so as to substantially reduce the requirement to voltage doubling rectifing circuit 4, can also obtain ripple system
The very low high direct voltage of number.The pulse transformer T132 is high frequency transformer, and the pulse transformer T1 primary coils are 30
Circle, subgrade coil N2 and N3 are 30 circles.The transformer coupled power amplifying circuit 3 also includes high-tension transformer T233, institute
It is high frequency transformer to state high-tension transformer T233, and high-tension transformer T233 the primary coils N4 and N5 are 8 circles, subgrade coil
N6 is 800 circles.The voltage doubling rectifing circuit 4 is four voltage-multiplying circuits, including high-voltage capacitance 42 and kenotron 41.
Again as shown in figure 3, the feedback control circuit 6 also includes current foldback circuit 64, the current foldback circuit 64
63 are connected with pulse-width modulation circuit.The core of pulse-width modulation circuit 63 is PWM controller (UC-1856-SP) 631, its internal bag
Operational amplifier containing current sampling and Voltage Feedback error amplifier.UC-1856-SP 3 pin and 4 pin connect current sampling electricity respectively
R4 both ends are hindered, the RC filter circuits that R3 and C1 are formed can effectively reduce the voltage transient of switch, play a part of stability contorting.
The bleeder circuit that R1 and R2 is formed can flexibly set the protection point of input circuit electric current.It is connected with UC-1856-SP 9 pin
The resistance R5 and C2 being connected with 8 pin, both, which coordinate, can accurately control the frequency of pulsewidth modulation, i.e. 11 pin of UC-1856-SP and
14 pin export the frequency of square wave.Meanwhile the pin of in-phase end 5 of the internal error transformer of PWM controller 631 and the pin phase of reference voltage 1
Even, the pin of end of oppisite phase 6 of error amplifier is connected to the ground.Error amplifier and outside sampling feedback inside PWM controller 631
Control circuit collective effect, to reach the real-time accurate control to output voltage.
It should be appreciated that although the present specification is described in terms of embodiments, not each embodiment only includes one
Individual independent technical scheme, this narrating mode of specification is only that those skilled in the art will should say for clarity
Bright book is as an entirety, and the technical solutions in the various embodiments may also be suitably combined, and forming those skilled in the art can be with
The other embodiment of understanding.
Claims (7)
- A kind of 1. adjustable DC high voltage power supply, it is characterised in that：Filtered including the low-voltage dc power supply as power input, LC Circuit, transformer coupled power amplifying circuit, voltage doubling rectifing circuit, HVDC output end, the low-voltage dc power supply is through LC Filter circuit is followed by transformer coupled power amplifying circuit, and transformer coupled power amplifying circuit is connected with voltage doubling rectifing circuit Connect, voltage doubling rectifing circuit output end connection DC high-voltage output end, described adjustable DC high voltage power supply also includes feedback control Circuit, the feedback control circuit include sampling backfeed loop, control circuit and pulse-width modulation circuit, the control circuit control For pulse-width modulation circuit to control the voltage of the DC high-voltage output end, the sampling feedback loop input connects high direct voltage Output end, output end connection pulse-width modulation circuit, pulse-width modulation circuit control transformer coupled power to amplify by FET Circuit.
- 2. adjustable DC high voltage power supply as claimed in claim 1, it is characterised in that：The pulse-width modulation circuit includes model UC1856-SP PWM controller.
- 3. adjustable DC high voltage power supply as claimed in claim 1, it is characterised in that：The transformer coupled power amplifying circuit Including bridge push pull power amplification circuit.
- 4. adjustable DC high voltage power supply as claimed in claim 1, it is characterised in that：The transformer coupled power amplifying circuit Including pulse transformer T1, the pulse transformer T1 is high frequency transformer, and the pulse transformer T1 primary coils are 30 circles, Subgrade coil N2 and N3 are 30 circles.
- 5. adjustable DC high voltage power supply as claimed in claim 1, it is characterised in that：The transformer coupled power amplifying circuit Be high frequency transformer also including high-tension transformer T2, the high-tension transformer T2, the high-tension transformer T2 primary coils N4 and N5 is 8 circles, and subgrade coil N6 is 800 circles.
- 6. adjustable DC high voltage power supply as claimed in claim 1, it is characterised in that：The voltage doubling rectifing circuit is four times of piezoelectricity Road, including high-voltage capacitance and kenotron.
- 7. adjustable DC high voltage power supply as claimed in claim 1, it is characterised in that：The feedback control circuit also includes excessively stream Protection circuit, the current foldback circuit are connected with pulse-width modulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720591341.XU CN206962712U (en) | 2017-05-25 | 2017-05-25 | A kind of adjustable DC high voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720591341.XU CN206962712U (en) | 2017-05-25 | 2017-05-25 | A kind of adjustable DC high voltage power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206962712U true CN206962712U (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720591341.XU Expired - Fee Related CN206962712U (en) | 2017-05-25 | 2017-05-25 | A kind of adjustable DC high voltage power supply |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088546A (en) * | 2018-10-29 | 2018-12-25 | 中国电子科技集团公司第十四研究所 | Portable titanium pump power supply for electrovacuum microwave tube |
-
2017
- 2017-05-25 CN CN201720591341.XU patent/CN206962712U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088546A (en) * | 2018-10-29 | 2018-12-25 | 中国电子科技集团公司第十四研究所 | Portable titanium pump power supply for electrovacuum microwave tube |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 |