CN108258924A - A kind of high-voltage DC power supply - Google Patents
A kind of high-voltage DC power supply Download PDFInfo
- Publication number
- CN108258924A CN108258924A CN201711481425.9A CN201711481425A CN108258924A CN 108258924 A CN108258924 A CN 108258924A CN 201711481425 A CN201711481425 A CN 201711481425A CN 108258924 A CN108258924 A CN 108258924A
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- CN
- China
- Prior art keywords
- voltage
- pulse width
- width modulator
- resistance
- output
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of high-voltage DC power supplies, including the first rectifier filter being connected successively with alternating voltage, high-voltage frequency converter and the second rectifier filter, the output terminal output high-voltage dc voltage of second rectifier filter, sampled feedback circuit and pulse width modulator are connected the output terminal of second rectifier filter with the input terminal of high-voltage frequency converter successively, pulse width modulator is also connected with microcontroller, high AC voltage is after the first rectifying and wave-filtering, with driving high frequency transformer together with the output signal of pulse width modulator, the high voltage power supply obtained by high frequency transformer is again after the second rectifier filter rectification, export high voltage direct current, the sampled feedback circuit of high voltage direct current of second rectifier filter output feeds back to pulse width modulator so as to adjust output voltage.The present invention can not only improve the stability and response speed of output voltage, and the size of output voltage can be adjusted by pulse width modulator, small, easy to use.
Description
Technical field
The present invention relates to field of switch power more particularly to a kind of high-voltage DC power supplies.
Background technology
High-voltage DC power supply is inputted by alternating current, the power supply of high voltage direct current electricity output, has that stability is good, reliability is high
The advantages of.Traditional high-voltage DC power supply is usually to generate high voltage direct current by transformer boosting and then rectified filtering, this
The volume and weight of transformer is all bigger, causes the transfer efficiency of power supply and stability all poor, and the work frequency of transformer
Rate is relatively low, and output voltage cannot adjust, and the application of this power supply is caused to be restricted.
Invention content
The purpose of the present invention is to provide a kind of high-voltage DC power supplies, can improve the stability and response speed of power supply,
And it is small, it is easy to use.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of high-voltage DC power supply, including be connected successively with alternating voltage the first rectifier filter, high-voltage frequency converter and second
Rectifier filter, the output terminal output high-voltage dc voltage of the second rectifier filter, the output terminal of the second rectifier filter is successively
Sampled feedback circuit and pulse width modulator are connected with the input terminal of high-voltage frequency converter, and pulse width modulator is also connected with microcontroller,
High AC voltage drives high frequency transformer after the first rectifying and wave-filtering together with the output signal of pulse width modulator, passes through height
The high voltage power supply that frequency power transformer obtains after the second rectifier filter rectification, exports high voltage direct current, the second rectifier filter again
The sampled feedback circuit of high voltage direct current of output feeds back to pulse width modulator, and pulse width modulator is by the voltage and microcontroller of feedback
The reference voltage of offer is compared, and controls the output duty cycle of pulse width modulator, to adjust output voltage.
Preferably, the power end of the pulse width modulator is connected through the first diode with one end of the first transformer secondary,
The power end of pulse width modulator is also connected through the first capacitance with the other end of the first transformer secondary, and the first capacitance both ends are parallel with
Second capacitance, the primary side connection alternating voltage of first transformer, the in-phase input end of the pulse width modulator is through the first electricity
Resistance is connected with the reference voltage terminal of pulse width modulator, and the first in-phase input end of pulse width modulator is also grounded through second resistance, arteries and veins
The reference voltage terminal of wide modulator is grounded through third capacity earth, the RT ends of pulse width modulator through 3rd resistor, pulse width modulator
The 4th resistance eutral grounding of CT ends, the compensating end of pulse width modulator is successively through the 5th resistance and the 4th capacity earth, pulsewidth modulation
First reverse inter-input-ing ending grounding of device, the first transmitting terminal of pulse width modulator are connected with the second transmitting terminal, and the of pulse width modulator
One transmitting terminal is through the 6th resistance and the 7th resistance eutral grounding, the grid of the common end and first switch pipe of the 6th resistance and the 7th resistance
It is connected, the drain electrode of first switch pipe is through the first inductance connection power supply, and the source electrode of first switch pipe and the second of pulse width modulator is together
Phase input terminal is connected, and the source electrode of first switch pipe is also through the 8th resistance eutral grounding, the second inverting input of the pulse width modulator
It is connected with sampling feedback circuit, the control terminal that is forced shutdown of pulse width modulator is connected with microcontroller.
Preferably, the source through the 5th capacitance and the second diode and first switch pipe successively that drains of the first switch pipe
Extremely it is connected, the second diode both ends are parallel with the 9th resistance, the source electrode ground connection of first switch pipe, the drain electrode of the first switch pipe
One end also with high frequency transformer primary side is connected, the other end ground connection of high frequency transformer primary side, high frequency transformer secondary and second
Rectifier filter is connected.
Preferably, second rectifier filter includes the third diode for being connected in parallel on high frequency transformer secondary both ends, the
The both ends of three diodes are parallel with the 4th diode and the 6th capacitance, the common end output of the 4th diode and the 6th capacitance
High voltage direct current.
Preferably, the sampling feedback circuit includes sampling resistor and isolator, and the sampling resistor is included by the tenth electricity
The series circuit of resistance, the 11st resistance and the 12nd resistance composition, one end of series circuit are electrically connected with the high voltage direct current exported,
The other end is grounded, and the 11st resistance uses adjustable resistance, and the sliding end of the 11st resistance is through isolator and pulse width modulator
The second inverting input be connected.
The configuration of the present invention is simple, after the first rectifier filter of promoting menstruation carries out rectifying and wave-filtering to the alternating voltage of input, with arteries and veins
The output signal of wide modulator drives high frequency transformer together, and the high voltage power supply obtained by high frequency transformer is again through the second rectification
After wave filter rectification, high voltage direct current, the sampled feedback circuit feedback of high voltage direct current of the second rectifier filter output are exported
To pulse width modulator, the voltage of feedback and the reference voltage that microcontroller provides are compared by pulse width modulator, control pulsewidth tune
The output duty cycle of device processed to adjust output voltage, can not only improve the stability and response speed of output voltage, Er Qieneng
The size of output voltage is enough adjusted by pulse width modulator, it is small, it is easy to use, requirement high voltage, low can be widely used in
In the Miniature Power Unit system of electric current.
Description of the drawings
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the circuit diagram of PWM pulse width modulators of the present invention；
Fig. 3 is the circuit diagram of high-voltage frequency converter of the present invention, the second rectifier filter and sampling feedback circuit.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described embodiment
Only section Example of the invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Other all embodiments that art personnel are obtained under the premise of creative work is not made belong to the protection model of the present invention
It encloses.
As shown in Figure 1 to Figure 3, a kind of high-voltage DC power supply of the present invention, including what is be connected successively with alternating voltage
First rectifier filter, high-voltage frequency converter and the second rectifier filter, the output terminal output high voltage direct current of the second rectifier filter
Voltage, the output terminal of the second rectifier filter input terminal of sampled feedback circuit and pulse width modulator and high-voltage frequency converter successively
It is connected, pulse width modulator is also connected with microcontroller, and high AC voltage is after the first rectifying and wave-filtering, the output with pulse width modulator
Signal drives high frequency transformer together, the high voltage power supply obtained by high frequency transformer again after the second rectifier filter rectification,
High voltage direct current is exported, the sampled feedback circuit of high voltage direct current of the second rectifier filter output feeds back to pulse width modulator,
The voltage of feedback and the reference voltage that microcontroller provides are compared by pulse width modulator, control the output duty of pulse width modulator
Than to adjust output voltage.
The power end of pulse width modulator IC1（15 pins）One end phase through the first diode with the first transformer T1 secondary
Even, the power end of pulse width modulator IC1（15 pins）Also it is connected through the first capacitance C1 with the other end of the first transformer T1 secondary,
First capacitance C1 both ends are parallel with the primary side connection alternating voltage of the second capacitance C2, the first transformer T1, pulse width modulator IC1's
In-phase input end（2 pins）Reference voltage terminal through first resistor R1 Yu pulse width modulator IC1（16 pins）It is connected, pulsewidth modulation
The first in-phase input end of device IC1（2 pins）It is also grounded through second resistance R2, the reference voltage terminal of pulse width modulator IC1（16 draw
Foot）It is grounded through third capacitance C3, the RT ends of pulse width modulator IC1（6 pins）It is grounded through 3rd resistor R3, pulse width modulator IC1
CT ends（7 pins）It is grounded through the 4th resistance R4, the compensating end of pulse width modulator IC1（9 pins）Successively through the 5th resistance R5 and
4th capacitance C4 is grounded, the first inverting input of pulse width modulator IC1（5 pins）Ground connection, the first hair of pulse width modulator IC1
Penetrate end（14 pins）With the second transmitting terminal（11 pins）It is connected, the first transmitting terminal of pulse width modulator IC1（14 pins）Through the 6th
Resistance R6 and the 7th resistance R7 ground connection, the common end of the 6th resistance R6 and the 7th resistance R7 and the grid phase of first switch pipe Q1
Even, the drain electrode of first switch pipe Q1 is through the first inductance L1 connection power supply VCC, the source electrode and pulse width modulator of first switch pipe Q1
The second in-phase input end of IC1（4 pins）It is connected, the source electrode of first switch pipe Q1 is also grounded through the 8th resistance R8, pulsewidth modulation
The second inverting input of device IC1（1 pin）It is connected with sampling feedback circuit, pulse width modulator IC1's is forced shutdown control terminal
（10 pins）It is connected with microcontroller.
The source electrode through the 5th capacitance C5 and the second diode D2 Yu first switch pipe Q1 successively that drains of first switch pipe Q1
It is connected, the second diode C2 both ends are parallel with the 9th resistance R9, the source electrode ground connection of first switch pipe Q1, the leakage of first switch pipe Q1
The one end of pole also with high frequency transformer T2 primary sides is connected, the other end ground connection of high frequency transformer T2 primary sides, high frequency transformer T2 pairs
Side is connected with the second rectifier filter.
Second rectifier filter includes the third diode D3 for being connected in parallel on high frequency transformer T2 secondary both ends, third diode
The common end output that the both ends of D3 are parallel with the 4th diode D4 and the 6th capacitance C6, the 4th diode D4 and the 6th capacitance C6 is high
Straightening galvanic electricity.
Sampling feedback circuit includes sampling resistor and isolator, and sampling resistor is included by the tenth resistance R10, the 11st resistance
The series circuit of R11 and the 12nd resistance R12 compositions, one end of series circuit are electrically connected with the high voltage direct current exported, the other end
Ground connection, the 11st resistance R11 use adjustable resistance, and the sliding end of the 11st resistance R11 is through isolator and pulse width modulator IC1
Second inverting input（1 pin）It is connected.
High AC voltage drives high frequency transformation after the first rectifying and wave-filtering together with the output signal of pulse width modulator
Device, the high voltage power supply obtained by high frequency transformer after the second rectifier filter rectification, export high voltage direct current again.Second is whole
The sampled feedback circuit of high voltage direct current of stream wave filter output feeds back to pulse width modulator, when output voltage is higher, sampling
The signal of feedback circuit is also higher, and the voltage of feedback and the reference voltage that microcontroller provides are compared by pulse width modulator, adjusts
The duty ratio of output waveform is saved, the width of duty ratio that pulse-width modulator exports is made to narrow, output voltage is caused to decline, otherwise also
So, thus output voltage is adjusted.
The present invention can not only improve the stability and response speed of output voltage, and can pass through pulse width modulator tune
The size of output voltage is saved, it is small, it is easy to use, the Miniature Power Unit system of requirement high voltage, low current can be widely used in
In.
Claims (5)
1. a kind of high-voltage DC power supply, it is characterised in that：Including be connected successively with alternating voltage the first rectifier filter, high pressure
Frequency converter and the second rectifier filter, the output terminal output high-voltage dc voltage of the second rectifier filter, the second rectifier filter
Output terminal sampled feedback circuit and pulse width modulator are connected with the input terminal of high-voltage frequency converter successively, pulse width modulator also with
Microcontroller is connected, and high AC voltage drives high frequency to become after the first rectifying and wave-filtering together with the output signal of pulse width modulator
Depressor, the high voltage power supply obtained by high frequency transformer export high voltage direct current again after the second rectifier filter rectification, and second
The sampled feedback circuit of high voltage direct current of rectifier filter output feeds back to pulse width modulator, and pulse width modulator is by the electricity of feedback
The reference voltage provided with microcontroller is pressed to be compared, the output duty cycle of pulse width modulator is controlled, to adjust output voltage.
2. a kind of high-voltage DC power supply as described in claim 1, it is characterised in that：The power end of the pulse width modulator is through
One diode is connected with one end of the first transformer secondary, and the power end of pulse width modulator is also through the first capacitance and the first transformer
The other end of secondary is connected, and the first capacitance both ends are parallel with the second capacitance, and the primary side of first transformer connects alternating voltage,
The in-phase input end of the pulse width modulator is connected through first resistor with the reference voltage terminal of pulse width modulator, pulse width modulator
First in-phase input end is also grounded through second resistance, and the reference voltage terminal of pulse width modulator is through third capacity earth, pulsewidth modulation
The RT ends of device are grounded through 3rd resistor, and the 4th resistance eutral grounding of CT ends of pulse width modulator, the compensating end of pulse width modulator is successively
Through the 5th resistance and the 4th capacity earth, the first reverse inter-input-ing ending grounding of pulse width modulator, the first transmitting of pulse width modulator
End is connected with the second transmitting terminal, the first transmitting terminal of pulse width modulator through the 6th resistance and the 7th resistance eutral grounding, the 6th resistance and
The common end of 7th resistance is connected with the grid of first switch pipe, and the drain electrode of first switch pipe is through the first inductance connection power supply, and
The source electrode of one switching tube is connected with the second in-phase input end of pulse width modulator, and the source electrode of first switch pipe also connects through the 8th resistance
Ground, the second inverting input of the pulse width modulator are connected with sampling feedback circuit, and pulse width modulator is forced shutdown control
End is connected with microcontroller.
3. a kind of high-voltage DC power supply as claimed in claim 2, it is characterised in that：The drain electrode of the first switch pipe passes through successively
5th capacitance and the second diode are connected with the source electrode of first switch pipe, and the second diode both ends are parallel with the 9th resistance, and first
The source electrode ground connection of switching tube, one end to drain also with high frequency transformer primary side of the first switch pipe are connected, high frequency transformer
The other end ground connection of primary side, high frequency transformer secondary are connected with the second rectifier filter.
4. a kind of high-voltage DC power supply as claimed in claim 3, it is characterised in that：Second rectifier filter includes parallel connection
Third diode at high frequency transformer secondary both ends, the both ends of third diode are parallel with the 4th diode and the 6th capacitance,
The common end of 4th diode and the 6th capacitance exports high voltage direct current.
5. a kind of high-voltage DC power supply as claimed in claim 4, it is characterised in that：The sampling feedback circuit includes sampling electricity
Resistance and isolator, the sampling resistor include the series circuit being made of the tenth resistance, the 11st resistance and the 12nd resistance, string
The one end and the high voltage direct current of output for joining circuit are electrically connected, and other end ground connection, the 11st resistance is using adjustable resistance, and the tenth
The sliding end of one resistance is connected through isolator with the second inverting input of pulse width modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481425.9A CN108258924A (en) | 2017-12-29 | 2017-12-29 | A kind of high-voltage DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481425.9A CN108258924A (en) | 2017-12-29 | 2017-12-29 | A kind of high-voltage DC power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108258924A true CN108258924A (en) | 2018-07-06 |
Family
ID=62724648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711481425.9A Withdrawn CN108258924A (en) | 2017-12-29 | 2017-12-29 | A kind of high-voltage DC power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108258924A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109996372A (en) * | 2019-04-30 | 2019-07-09 | 电子科技大学中山学院 | LED driving power supply |
| CN111313723A (en) * | 2020-03-27 | 2020-06-19 | 深圳龙电电气股份有限公司 | Ammeter power supply circuit and ammeter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201733132U (en) * | 2010-07-30 | 2011-02-02 | 江苏省电力公司阜宁县供电公司 | Intelligent power distribution system |
| CN202772810U (en) * | 2012-10-10 | 2013-03-06 | 刘喆 | Direct-current inverter with adjustable output power |
| CN205265535U (en) * | 2015-12-31 | 2016-05-25 | 天津铭锐创科技有限公司 | High -voltage direct current power supply |
-
2017
- 2017-12-29 CN CN201711481425.9A patent/CN108258924A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201733132U (en) * | 2010-07-30 | 2011-02-02 | 江苏省电力公司阜宁县供电公司 | Intelligent power distribution system |
| CN202772810U (en) * | 2012-10-10 | 2013-03-06 | 刘喆 | Direct-current inverter with adjustable output power |
| CN205265535U (en) * | 2015-12-31 | 2016-05-25 | 天津铭锐创科技有限公司 | High -voltage direct current power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109996372A (en) * | 2019-04-30 | 2019-07-09 | 电子科技大学中山学院 | LED driving power supply |
| CN111313723A (en) * | 2020-03-27 | 2020-06-19 | 深圳龙电电气股份有限公司 | Ammeter power supply circuit and ammeter |
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Application publication date: 20180706 |
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