CN108199590A - A kind of high frequency switch power - Google Patents
A kind of high frequency switch power Download PDFInfo
- Publication number
- CN108199590A CN108199590A CN201711478343.9A CN201711478343A CN108199590A CN 108199590 A CN108199590 A CN 108199590A CN 201711478343 A CN201711478343 A CN 201711478343A CN 108199590 A CN108199590 A CN 108199590A
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- Prior art keywords
- voltage
- high frequency
- capacitance
- output
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- 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
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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
- H02M3/33523—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 with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of high frequency switch powers, including the input rectifying filter module being sequentially connected, pulse width modulation module, high frequency transformer, voltage feedback module and output rectification filter module, input rectifying filter module is used to the alternating current of input being changed into direct current, pulse width modulation module is used to be converted in direct current the square wave of required voltage value, high frequency transformer is used to adjust the size of voltage, output rectification filter module is used to for square-wave voltage to be changed into required DC voltage, voltage feedback module is used for the output voltage according to high frequency transformer come the output waveform of adjusting pulsewidth modulation module, so as to adjust the size of output voltage.The present invention can be according to the output voltage of high frequency transformer come the output waveform of adjusting pulsewidth modulation module, so as to adjust the size of output voltage；When output voltage fluctuates, change the size of current of the control terminal of switch chip by photoelectrical coupler, be capable of the output duty cycle of regulating switch chip, so as to achieve the purpose that voltage stabilizing.
Description
Technical field
The present invention relates to field of switch power more particularly to a kind of high frequency switch powers.
Background technology
Switching Power Supply is a kind of device for converting electric energy being made of the switching circuit of Duty ratio control, for AC-DC
Or DC-DC transformation of electrical energy, the core of Switching Power Supply are electronic power switching circuit, the output proposed according to load to power supply
Voltage stabilizing or the requirement of stabilized current characteristic using feedback control electric current, using Duty ratio control method, control switching circuit.
The volume switching tube of Switching Power Supply is operated in the through and off two states of high speed, so referred to as Switching Power Supply, principle is using whole
Alternating current is become direct current by current circuit, then direct current is become to the direct current of high frequency with switching tube, finally by rectifying and wave-filtering
After become stable direct current.With the development of Power Electronic Technique, Switching Power Supply is gradually sent out to the direction of miniaturization, high frequency
Exhibition, Switching Power Supply will develop to miniaturization, just have to reduce the quantity of component used, will result in switch in this way
The reliability and service life reduction of pipe, and during the raising of the frequency of Switching Power Supply, noise can also increase therewith, influence the steady of output voltage
It is qualitative.
Invention content
The purpose of the present invention is to provide a kind of high frequency switch power, while the switching frequency for ensureing Switching Power Supply,
System noise can be reduced, improves the stability of output voltage.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of high frequency switch power, including be sequentially connected input rectifying filter module, pulse width modulation module, high frequency transformer,
Voltage feedback module and output rectification filter module, input rectifying filter module are used to the alternating current of input being changed into direct current
Electricity, pulse width modulation module are used to be converted in direct current the square wave of required voltage value, and high frequency transformer is used to adjust the big of voltage
Small, for square-wave voltage to be changed into required DC voltage, voltage feedback module is used for according to height output rectification filter module
The output voltage of frequency power transformer carrys out the output waveform of adjusting pulsewidth modulation module, so as to adjust the size of output voltage.
Preferably, the input rectifying filter module includes electromagnetic interface filter and bridge rectifier, and electromagnetic interface filter includes
First capacitance and rectifier transformer, alternating voltage are connected through the first capacitance with the primary side of rectifier transformer, the pair of rectifier transformer
While be connected through the second capacitance with the input terminal of bridge rectifier, the first output terminal ground connection of bridge rectifier, bridge rectifier
The second output terminal of circuit is through third capacity earth；
The pulse width modulation module uses switch chip, source S, extreme power source setting end X and the switching frequency choosing of switch chip
It selects end F to be grounded, the wireline inspection end L of switch chip is connected through first resistor with the second output terminal of bridge rectifier, opens
The control terminal C for closing chip is connected with voltage feedback module, and the drain D of switch chip is successively through the first diode and the second diode
It is connected with the second output terminal of bridge rectifier, the drain D of the switch chip is also connected with the primary side of high frequency transformer, high
First secondary of frequency power transformer is connected with output rectification filter module, the second secondary and the voltage feedback module phase of high frequency transformer
Even；
The output rectification filter module includes the third diode being connected with one end of the first secondary of high frequency transformer, third
Diode is connected through the 4th capacitance with the other end of the first secondary of high frequency transformer, and the both ends of the 4th capacitance are parallel with successively
Five capacitances and the 6th capacitance, the 6th capacitance both ends are parallel with the first inductance and the 7th capacitance, and the both ends of the 7th capacitance are defeated
Go out DC voltage；
The voltage feedback module uses photoelectrical coupler, and the first input end of photoelectrical coupler is through second resistance and the three or two pole
The cathode of pipe is connected, and the second input terminal of photoelectrical coupler is connected with the cathode of source of stable pressure, the second input terminal of photoelectrical coupler
Also it is connected successively through the 8th capacitance and the 9th capacitance with the control pole of source of stable pressure, the 8th capacitance both ends are parallel with 3rd resistor, surely
The control pole of potential source is connected with the anode of output voltage, and the anode of source of stable pressure is connected through the 4th resistance with the control pole of source of stable pressure,
The anode of source of stable pressure is also connected with the cathode of output voltage, height of the first output terminal of the photoelectrical coupler through the 4th diode
One end of the second secondary of frequency power transformer is connected, the second output terminal of photoelectrical coupler also through the tenth capacitance and high frequency transformer
The other end of two secondary is connected, the other end of the second secondary of high frequency transformer ground connection, the second output terminal of photoelectrical coupler with
The control terminal C of switch chip is connected, and the second output terminal of photoelectrical coupler is also through the 11st capacity earth, the 11st capacitance both ends
It is parallel with the series circuit being made of the 5th resistance and the 12nd capacitance.
Preferably, the switch chip uses TOP248Y switch chips, and the source of stable pressure is steady using TL431 controllable accurates
Potential source.
The alternating current of input is changed into direct current, then pass through pulsewidth modulation by the present invention using input rectifying filter module
Module by direct current be converted to needed for voltage value square wave, then through high frequency transformer and output rectification filter module by square-wave voltage
It is changed into required DC voltage, voltage feedback module is according to the output voltage of high frequency transformer come adjusting pulsewidth modulation module
Output waveform, so as to adjust the size of output voltage；Input rectifying filter module includes electromagnetic interface filter and bridge rectifier,
Electromagnetic interface filter can inhibit electric network noise, improve the antijamming capability of power supply and the reliability of system.When wave occurs for output voltage
When dynamic, voltage feedback module acquisition output voltage is simultaneously compared with the reference voltage in source of stable pressure, on the cathode of source of stable pressure
Error partial pressure is formed, the second secondary of high frequency transformer obtains feedback voltage, and error partial pressure and feedback voltage pass through photoelectric coupling
Device changes the size of current of the control terminal of switch chip, the output duty cycle of regulating switch chip, so as to achieve the purpose that voltage stabilizing.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
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, a kind of high frequency switch power of the present invention, the input rectifying including being sequentially connected filters mould
Block, pulse width modulation module, high frequency transformer, voltage feedback module and output rectification filter module, input rectifying filter module are used
In the alternating current of input is changed into direct current, pulse width modulation module is used to be converted in direct current the square wave of required voltage value,
High frequency transformer is used to adjust the size of voltage, and output rectification filter module is used to for square-wave voltage to be changed into required direct current
Pressure, voltage feedback module are used for according to the output voltage of high frequency transformer come the output waveform of adjusting pulsewidth modulation module, thus
Adjust the size of output voltage.
Input rectifying filter module includes electromagnetic interface filter and bridge rectifier VD1, and electromagnetic interface filter includes the first capacitance
C1 and rectifier transformer T1, alternating voltage are connected through the first capacitance C1 with the primary side of rectifier transformer T1, rectifier transformer T1's
Secondary is connected through the second capacitance C2 with the input terminal of bridge rectifier VD1, the first output termination of bridge rectifier VD1
Ground, the second output terminal of bridge rectifier VD1 are grounded through third capacitance C3.
Pulse width modulation module uses switch chip IC1, and in the present embodiment, switch chip IC1 uses TOP248Y switch cores
Piece, source S, extreme power source setting end X and the switching frequency selection end F of switch chip IC1 are grounded, the line of switch chip IC1
Road test side L is connected through first resistor R1 with the second output terminal of bridge rectifier VD1, the control terminal C of switch chip IC1 with
Voltage feedback module is connected, and the drain D of switch chip IC1 is successively through the first diode D1 and the second diode D2 and bridge rectifier
The second output terminal of circuit VD1 is connected, and the primary side of the drain D of switch chip IC1 also with high frequency transformer T2 is connected, high frequency transformation
The first secondary of device T2 is connected with output rectification filter module, the second secondary and the voltage feedback module phase of high frequency transformer T2
Even.
Output rectification filter module includes the third diode D3 being connected with one end of the first secondary of high frequency transformer T2,
Third diode D3 is connected through the 4th capacitance C4 with the other end of the first secondary of high frequency transformer T2, the both ends of the 4th capacitance C4
It is parallel with the 5th capacitance C5 and the 6th capacitance C6 successively, the 6th capacitance C6 both ends are parallel with the first inductance L1 and the 7th capacitance C7,
The both ends of 7th capacitance C7 are output DC voltage.
Voltage feedback module uses photoelectrical coupler OSC1, and the first input end of photoelectrical coupler OSC1 is through second resistance R2
It is connected with the cathode of third diode D3, the second input terminal of photoelectrical coupler OSC1 is connected with the cathode of source of stable pressure Q1, at this
In embodiment, source of stable pressure Q1 uses TL431 controllable accurate source of stable pressure, and the second input terminal of photoelectrical coupler OSC1 is also successively through the
Eight capacitance C8 and the 9th capacitance C9 are connected with the control pole of source of stable pressure Q1, and the 8th capacitance C8 both ends are parallel with 3rd resistor R3, surely
The control pole of potential source Q1 is connected with the anode of output voltage, control of the anode through the 4th resistance R4 Yu source of stable pressure Q1 of source of stable pressure Q1
Extremely it is connected, the anode of source of stable pressure Q1 is also connected with the cathode of output voltage, and the first output terminal of photoelectrical coupler OSC1 is through the 4th
One end of the second secondary of the high frequency transformer T2 of diode D4 is connected, and the second output terminal of photoelectrical coupler OSC1 is also through the tenth
Capacitance C10 is connected with the other end of the second secondary of high frequency transformer T2, another termination of the second secondary of high frequency transformer T2
Ground, the second output terminal of photoelectrical coupler OSC1 are connected with the control terminal C of switch chip IC1, and the second of photoelectrical coupler OSC1
Output terminal is also grounded through the 11st capacitance C11, and the 11st capacitance C11 both ends are parallel with by the 5th resistance R5 and the 12nd capacitance
The series circuit of C12 compositions.
When output voltage fluctuates, the 4th resistance R4 by the reference voltage in collected voltage and source of stable pressure Q1 into
Row compares, and forms error partial pressure on the cathode of source of stable pressure Q1, the second secondary of high frequency transformer T2 through the 4th diode D4 and
Feedback voltage is obtained after tenth capacitance C10 rectifying and wave-filterings, error partial pressure and feedback voltage are opened by photoelectrical coupler OSC1 changes
Close the size of current of the control terminal C of chip IC 1, the output duty cycle of regulating switch chip IC 1, so as to achieve the purpose that voltage stabilizing；
5th resistance R5 and the 12nd capacitance C12 composition peak voltage filters, enable bias voltage to keep steady in heavier loads
It is fixed, ensure the stability of switch power source output voltage.
Claims (3)
1. a kind of high frequency switch power, it is characterised in that：Including input rectifying filter module, the pulsewidth modulation mould being sequentially connected
Block, high frequency transformer, voltage feedback module and output rectification filter module, input rectifying filter module are used for the exchange inputted
Electricity is changed into direct current, and pulse width modulation module is used to be converted in direct current the square wave of required voltage value, and high frequency transformer is used for
The size of voltage is adjusted, output rectification filter module is used to for square-wave voltage to be changed into required DC voltage, Voltage Feedback mould
Block is used for according to the output voltage of high frequency transformer come the output waveform of adjusting pulsewidth modulation module, so as to adjust output voltage
Size.
2. a kind of high frequency switch power as described in claim 1, it is characterised in that：The input rectifying filter module includes
Electromagnetic interface filter and bridge rectifier, electromagnetic interface filter include the first capacitance and rectifier transformer, and alternating voltage is through the first capacitance
It is connected with the primary side of rectifier transformer, the secondary of rectifier transformer is connected through the second capacitance with the input terminal of bridge rectifier,
The first output terminal ground connection of bridge rectifier, the second output terminal of bridge rectifier is through third capacity earth；
The pulse width modulation module uses switch chip, source S, extreme power source setting end X and the switching frequency choosing of switch chip
It selects end F to be grounded, the wireline inspection end L of switch chip is connected through first resistor with the second output terminal of bridge rectifier, opens
The control terminal C for closing chip is connected with voltage feedback module, and the drain D of switch chip is successively through the first diode and the second diode
It is connected with the second output terminal of bridge rectifier, the drain D of the switch chip is also connected with the primary side of high frequency transformer, high
First secondary of frequency power transformer is connected with output rectification filter module, the second secondary and the voltage feedback module phase of high frequency transformer
Even；
The output rectification filter module includes the third diode being connected with one end of the first secondary of high frequency transformer, third
Diode is connected through the 4th capacitance with the other end of the first secondary of high frequency transformer, and the both ends of the 4th capacitance are parallel with successively
Five capacitances and the 6th capacitance, the 6th capacitance both ends are parallel with the first inductance and the 7th capacitance, and the both ends of the 7th capacitance are defeated
Go out DC voltage；
The voltage feedback module uses photoelectrical coupler, and the first input end of photoelectrical coupler is through second resistance and the three or two pole
The cathode of pipe is connected, and the second input terminal of photoelectrical coupler is connected with the cathode of source of stable pressure, the second input terminal of photoelectrical coupler
Also it is connected successively through the 8th capacitance and the 9th capacitance with the control pole of source of stable pressure, the 8th capacitance both ends are parallel with 3rd resistor, surely
The control pole of potential source is connected with the anode of output voltage, and the anode of source of stable pressure is connected through the 4th resistance with the control pole of source of stable pressure,
The anode of source of stable pressure is also connected with the cathode of output voltage, height of the first output terminal of the photoelectrical coupler through the 4th diode
One end of the second secondary of frequency power transformer is connected, the second output terminal of photoelectrical coupler also through the tenth capacitance and high frequency transformer
The other end of two secondary is connected, the other end of the second secondary of high frequency transformer ground connection, the second output terminal of photoelectrical coupler with
The control terminal C of switch chip is connected, and the second output terminal of photoelectrical coupler is also through the 11st capacity earth, the 11st capacitance both ends
It is parallel with the series circuit being made of the 5th resistance and the 12nd capacitance.
3. a kind of high frequency switch power as claimed in claim 2, it is characterised in that：The switch chip is opened using TOP248Y
Chip is closed, the source of stable pressure uses TL431 controllable accurate source of stable pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478343.9A CN108199590A (en) | 2017-12-29 | 2017-12-29 | A kind of high frequency switch power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711478343.9A CN108199590A (en) | 2017-12-29 | 2017-12-29 | A kind of high frequency switch power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108199590A true CN108199590A (en) | 2018-06-22 |
Family
ID=62586526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711478343.9A Withdrawn CN108199590A (en) | 2017-12-29 | 2017-12-29 | A kind of high frequency switch power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108199590A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112783254A (en) * | 2020-12-23 | 2021-05-11 | 南京交通职业技术学院 | Auxiliary voltage source capable of automatically adjusting output and suitable for building safety |
| CN114290905A (en) * | 2021-12-31 | 2022-04-08 | 银川威力传动技术股份有限公司 | Active discharge circuit of motor controller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112783254A (en) * | 2020-12-23 | 2021-05-11 | 南京交通职业技术学院 | Auxiliary voltage source capable of automatically adjusting output and suitable for building safety |
| CN114290905A (en) * | 2021-12-31 | 2022-04-08 | 银川威力传动技术股份有限公司 | Active discharge circuit of motor controller |
| CN114290905B (en) * | 2021-12-31 | 2024-05-24 | 银川威力传动技术股份有限公司 | Active discharging circuit of motor controller |
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Application publication date: 20180622 |