CN108123591A - Power-switching circuit and power supply changeover device - Google Patents
Power-switching circuit and power supply changeover device Download PDFInfo
- Publication number
- CN108123591A CN108123591A CN201810049731.3A CN201810049731A CN108123591A CN 108123591 A CN108123591 A CN 108123591A CN 201810049731 A CN201810049731 A CN 201810049731A CN 108123591 A CN108123591 A CN 108123591A
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- 238000004146 energy storage Methods 0.000 claims abstract description 54
- 230000005611 electricity Effects 0.000 claims abstract description 9
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
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
- H02M1/00—Details of apparatus for conversion
-
- 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
-
- 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
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to power technique fields, provide a kind of power-switching circuit and power supply changeover device, power-switching circuit includes control unit, transformer, first switch, second switch, energy-storage units and start unit, the energy-storage units are connected between the public connecting end of the first switch and the second switch and the power pins of described control unit, the start unit is connected between the energy-storage units and the primary coil, it charges to the energy-storage units, to provide the startup power supply of described control unit；And described control unit controls being turned on and off for the first switch and the second switch, described control unit is supplied electricity to the charge and discharge for controlling the energy-storage units, the required working power is provided, and the control transformer exports stable output voltage to the output circuit, it can save to the auxiliary winding of control unit power supply, the complexity of circuit is reduced, reduces circuit cost.
Description
Technical field
The invention belongs to power technique fields more particularly to a kind of power-switching circuits and power supply changeover device.
Background technology
At present, traditional power supply changeover device is as shown in Figure 1, it includes input unit, transformer, output circuit, switch, control
Unit processed, diode and capacitance；The closure of control unit control switch unit and disconnection are completed input circuit by transformer and are arrived
The power supply conversion of output circuit, at work, the working power of control unit passes through diode by the auxiliary winding on transformer
It is provided with after the rectification and filtering of capacitance, this power supply changeover device needs additional auxiliary winding, diode and capacitance to provide control
Power supply needed for unit processed, circuit is complicated, and circuit cost is high.
Therefore, the problem of complicated there are circuit in traditional technical solution, and circuit cost is high.
The content of the invention
It is an object of the invention to provide a kind of power-switching circuits, it is intended to solve electric present in traditional technical solution
The problem of road is complicated, and circuit cost is high.
A kind of power-switching circuit, is connected between input circuit and output circuit, including：
Control unit；
Transformer, the transformer include the primary coil and secondary coil that intercouple, the primary coil and input
Circuit connects, and the secondary coil is connected with the output circuit；
First switch and second switch, the first switch and the second switch are series at the primary coil and ground
Between；
One energy-storage units, the public connecting end for being connected to the first switch and the second switch and the control
Between the power pins of unit；
One start unit, the start unit are connected between the energy-storage units and the primary coil, to the storage
Energy unit charges, to provide the startup power supply of described control unit；And
Described control unit controls being turned on and off for the first switch and the second switch, to control the energy storage
The charge and discharge of unit supplies electricity to described control unit and provides the required working power and the control transformer to the output electricity
The stable output voltage of road output.
In addition, additionally providing a kind of power supply changeover device, including input circuit, output circuit and the input is connected to
Above-mentioned power-switching circuit between circuit and the output circuit.
Above-mentioned power-switching circuit starts control unit by start unit, and is opened by control unit control first
Close and the open and close of second switch, can the electric discharge period of charge period and the secondary coil of the primary coil of transformer it
Between to energy-storage units charge and discharge, primary coil charges to energy-storage units, so as to when energy-storage units discharges offer DC voltage to
Control unit, to maintain the working power of control unit, can save to the auxiliary winding of control unit power supply, reduce electricity
The complexity on road, reduces circuit cost.
Description of the drawings
Fig. 1 is traditional converter circuitry of power structure diagram；
Fig. 2 is the electrical block diagram for the power supply changeover device that one embodiment of the invention provides；
Fig. 3 is the electrical block diagram for the power supply changeover device that another embodiment of the present invention provides；
Fig. 4 is the exemplary circuit schematic diagram of start unit in power-switching circuit shown in Fig. 2；
Fig. 5 is the circuit diagram of power-switching circuit initial shift shown in Fig. 2；
Fig. 6 is the circuit diagram of the second working stage of power-switching circuit shown in Fig. 2；
Fig. 7 is the circuit diagram of the 3rd working stage of power-switching circuit shown in Fig. 2.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 2 shows the structure diagram for the power-switching circuit 100 that first embodiment of the invention provides, power supply conversion electricity
Road 100 is connected between input circuit 200 and output circuit 300, is passed through after the voltage that input circuit 200 inputs is converted
Output circuit 300 exports.Wherein, power-switching circuit 100 is opened including transformer T, control unit 10, start unit 20, first
Close 30, second switch 40 and energy-storage units C0.
Transformer T includes the primary coil and secondary coil that intercouple, and primary coil is connected with input circuit 200, secondary
Sideline circle is connected with output circuit 300, and input circuit 200 after transformer T voltage conversions through circuit of output terminal by exporting, specifically
, the first end of primary coil is connected with input circuit 200, is accessed input voltage, is gone here and there between the second end and ground of primary coil
First switch 30 and second switch 40 are associated with, by first switch 30 and the open and close of second switch 40, controls primary side line
It encloses to secondary coil and electric energy is provided.
Control unit 10 is used to control the open and close of first switch 30 and second switch 40, the control of first switch 30
The control terminal of end and second switch 40 is connected with control unit 10, the control signal of reception control unit 10.Wherein, control unit
10 startup power supply is provided by start unit 20, which carries out energy-storage units C0 at the initial stage that powers on of control unit 10
It charges, to provide the electric energy needed for control unit 10, control unit 10 is made to have the closure of enough controlling electric energy first switches 30
And disconnection.Specifically, as shown in Figures 2 and 3, start unit 20 is connected to the first end or second end of primary coil, from input
The second end of the output terminal of circuit 200 or primary coil obtains electric energy, provides control unit 10 and controls first switch 30 and the
Electric energy needed for two switches 40.
As shown in figure 4, start unit 20 be used for energy-storage units C0 charge, and using the discharge voltage of energy-storage units C0 as
Startup power supply.Wherein, start unit 20 includes comparator U1, the first divider resistance R2, the second divider resistance R3, current-limiting resistance
R1, rectification circuit 21 and the 3rd switch K.Specifically, the first end of the first end connection primary coil of current-limiting resistance R1, current limliting electricity
The input terminal of the 3rd switch K of second end connection of R1 is hindered, the output terminal of the 3rd switch K connects energy-storage units by rectification circuit 21
The first end of C0, the second end ground connection of energy-storage units C0, the first divider resistance R2 and the second divider resistance R3 are connected on energy storage list
The inverting input of the both ends of first C0, the first divider resistance R2 and the second divider resistance R3 public connecting ends connection comparator U1,
The homophase input of comparator U1 terminates a reference voltage, the control terminal of the 3rd switch K of output terminal connection of comparator U1.In this reality
Apply in example, rectification circuit 21 by four rectifier diodes D1, D2, D3, D4 form to primary coil export alternating current carry out it is whole
Stream, to charge to energy-storage units C0.Wherein, the 3rd switch K is normal open switch, before start unit 20 starts, the 3rd switch K
It disconnects, the voltage at energy-storage units C0 both ends is zero, the input low level of the inverse output terminal of comparator U1, the output of comparator U1
End output high level, the 3rd switch K are closed, and input circuit 200 is by current-limiting resistance R1 and rectifier diode D1 to energy-storage units
C0 charges, and the voltage of the first end of energy-storage units C0 rises, when the voltage of the first end of energy-storage units C0 is electric by the first partial pressure
When hindering the voltage value after R2 and the second divider resistance R3 partial pressures more than VREF, switch K0 is disconnected, and primary coil stops giving energy storage list
First C0 charges, and energy-storage units C0 electric discharges simultaneously provide startup power supply to control unit 10, and start-up course terminates.In other embodiment
In, start the output terminal of the input terminal connection input circuit 200 of circuit, directly take electricity from input circuit 200.
In a wherein embodiment, rectification circuit be also attached to first switch and the second switch public connecting end and
Between energy-storage units, by the one-way conduction characteristic of rectification circuit, the discharge current to prevent energy-storage units flows to first switch
With the second switch.In other embodiments, power-switching circuit 100 is additionally provided with protection circuit, which connects
It is connected between the public connecting end of first switch 30 and second switch 40 and energy-storage units C0, it is anti-when preventing energy-storage units C0 from discharging
It to conducting, prevents the discharge current of energy-storage units from flowing to first switch and the second switch, in this embodiment, protects circuit
For diode D0, the anode connection first switch 30 of diode D0 and the public connecting end of second switch 40, the moon of diode D0
The first end of pole connection energy-storage units C0, when energy-storage units C0 charges, diode D0 forward conductions, primary coil is opened by first
It closes 30 and diode D0 to charge to energy-storage units C0, when energy-storage units C0 discharges, diode D0 reversely ends, and prevents energy storage
The discharge current adverse current of unit C0.In other embodiments, two poles that circuit can be metal-oxide-semiconductor or NPN triode is formed are protected
Pipe circuit.
Energy-storage units C0 is connected between first switch 30 and the public connecting end and ground of second switch 40, energy-storage units C0
It discharges after charging complete the power end of control unit 10, the working power of control unit 10 is provided.Wherein, energy storage list
First C0 is capacitance, by the charge and discharge electro ultrafiltration of capacitance, to provide the power supply needed for control unit.10 start completion of control unit
Afterwards, the charging to energy-storage units C0 and energy storage list are controlled by controlling the open and close of first switch 30 and second switch 40
The electric discharge of first C0 maintains the working power of control unit 10, meanwhile, control unit 10 is by controlling first switch 30 and second to open
40 open and close is closed, control primary coil exports the electric energy of secondary coil, completes power supply conversion.
As shown in Figures 5 to 7, specifically, after the startup of control unit 10, circuit work is divided into following 3 stages：
First stage：Control unit 10 controls first switch 30 and second switch 40 all in closure state, transformer T's
The second end of primary coil is grounded by first switch 30 and second switch 40, and input circuit 200 stores up transformer T primary coils
Can, when the electric current on the primary coil of transformer T rises to pre-set current value, control unit 10 controls second switch 40 disconnected
It opens.
Second stage：Control unit 10 controls first switch 30 to be closed, and second switch 40 disconnects, the primary side line of transformer T
The second end of circle charges by first switch 30 and protection circuit to energy-storage units C0, when energy-storage units C0 both end voltages rise to
During preset voltage value, control unit 10 controls first switch 30 to disconnect.
Phase III：Control unit 10 controls first switch 30 to disconnect, and second switch 40 disconnects, the secondary line of transformer T
After the electric energy of circle sensing primary coil electric energy is provided to output circuit 300.When the voltage of secondary coil feedback rises to default electricity
During pressure value, control unit 10 controls first switch 30 and second switch 40 to be closed, and circuit reenters the first stage, so cycles
Back and forth, the secondary coil of transformer T exports stable voltage to output circuit 300.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of power-switching circuit, is connected between input circuit and output circuit, which is characterized in that including：
Control unit；
Transformer, the transformer include the primary coil and secondary coil that intercouple, the primary coil and input circuit
Connection, the secondary coil are connected with the output circuit；
First switch and second switch, the first switch and the second switch are series between the primary coil and ground；
One energy-storage units, the energy-storage units are connected to the public connecting end of the first switch and the second switch and described
Between the power pins of control unit；
One start unit, the start unit are connected between the energy-storage units and the primary coil, to the energy storage list
Member charges, to provide the startup power supply of described control unit；And
Described control unit controls being turned on and off for the first switch and the second switch, to control the energy-storage units
Charge and discharge supply electricity to described control unit provide needed for the working power and the control transformer it is defeated to the output circuit
Go out stable output voltage.
2. power-switching circuit as described in claim 1, which is characterized in that the input terminal of the start unit is connected to described
The first end or second end of primary coil.
3. power-switching circuit as described in claim 1, which is characterized in that the start unit include comparator, first point
Piezoresistance, the second divider resistance, current-limiting resistance, rectification circuit and the 3rd switch；
The first end of the current-limiting resistance connects the primary coil, second end connection the 3rd switch of the current-limiting resistance
Input terminal, the output terminal of the 3rd switch passes through the first end that the rectification circuit connects the energy-storage units, the storage
The second end ground connection of energy unit, first divider resistance and second divider resistance are connected on the two of the energy-storage units
End, first divider resistance connect the inverting input of the comparator, institute with the second divider resistance public connecting end
The homophase input for stating comparator terminates a reference voltage, the control terminal of output terminal connection the 3rd switch of the comparator.
4. power-switching circuit as claimed in claim 3, which is characterized in that the rectification circuit is connected to the first switch
And the second switch public connecting end and the energy-storage units between, prevent the discharge current of the energy-storage units from flowing to institute
State first switch and the second switch.
5. power-switching circuit as described in claim 1, which is characterized in that further include protection circuit, the protection circuit connects
It is connected between the public connecting end of the first switch and the second switch and the energy-storage units, prevents the energy-storage units
Discharge current flow to the first switch and the second switch.
6. power-switching circuit as claimed in claim 5, which is characterized in that it is described protection circuit for diode, metal-oxide-semiconductor or
NPN triode.
7. power-switching circuit as described in claim 1, which is characterized in that the energy-storage units are capacitance.
8. a kind of power supply changeover device, which is characterized in that including input circuit, output circuit and be connected to the input circuit
Power-switching circuit as claimed in any of claims 1 to 7 in one of claims between the output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810049731.3A CN108123591A (en) | 2018-01-18 | 2018-01-18 | Power-switching circuit and power supply changeover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810049731.3A CN108123591A (en) | 2018-01-18 | 2018-01-18 | Power-switching circuit and power supply changeover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108123591A true CN108123591A (en) | 2018-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810049731.3A Pending CN108123591A (en) | 2018-01-18 | 2018-01-18 | Power-switching circuit and power supply changeover device |
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| Country | Link |
|---|---|
| CN (1) | CN108123591A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601508A (en) * | 2018-06-12 | 2019-12-20 | 三垦电气株式会社 | Apparatus and method for controlling power converter |
| CN111199850A (en) * | 2018-11-16 | 2020-05-26 | 中车唐山机车车辆有限公司 | Solid state relay circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056964A (en) * | 2002-07-23 | 2004-02-19 | Mitsubishi Electric Corp | Power supply unit |
| CN101651426A (en) * | 2009-09-10 | 2010-02-17 | 广州金升阳科技有限公司 | Self-starting control power converter of output terminal |
| CN103051196A (en) * | 2013-01-16 | 2013-04-17 | 绍兴光大芯业微电子有限公司 | Isolation type power supply circuit structure for supplying power to integrated circuit without additional winding |
| CN203014668U (en) * | 2013-01-04 | 2013-06-19 | 无锡硅动力微电子股份有限公司 | Self-powered circuit applied to AC-DC switching mode power converter |
| US20150162773A1 (en) * | 2013-12-06 | 2015-06-11 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Flyback quick start driving circuit and driving method |
| CN104767408A (en) * | 2015-04-20 | 2015-07-08 | 成都岷创科技有限公司 | Alternating-current-direct-current conversion switching power source |
| KR20160146018A (en) * | 2015-06-11 | 2016-12-21 | 한국전기연구원 | Power supply device comprising high-voltage startup circuits |
| CN207994901U (en) * | 2018-01-18 | 2018-10-19 | 深圳市富满电子集团股份有限公司 | Power-switching circuit and power supply changeover device |
-
2018
- 2018-01-18 CN CN201810049731.3A patent/CN108123591A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004056964A (en) * | 2002-07-23 | 2004-02-19 | Mitsubishi Electric Corp | Power supply unit |
| CN101651426A (en) * | 2009-09-10 | 2010-02-17 | 广州金升阳科技有限公司 | Self-starting control power converter of output terminal |
| CN203014668U (en) * | 2013-01-04 | 2013-06-19 | 无锡硅动力微电子股份有限公司 | Self-powered circuit applied to AC-DC switching mode power converter |
| CN103051196A (en) * | 2013-01-16 | 2013-04-17 | 绍兴光大芯业微电子有限公司 | Isolation type power supply circuit structure for supplying power to integrated circuit without additional winding |
| US20150162773A1 (en) * | 2013-12-06 | 2015-06-11 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Flyback quick start driving circuit and driving method |
| CN104767408A (en) * | 2015-04-20 | 2015-07-08 | 成都岷创科技有限公司 | Alternating-current-direct-current conversion switching power source |
| KR20160146018A (en) * | 2015-06-11 | 2016-12-21 | 한국전기연구원 | Power supply device comprising high-voltage startup circuits |
| CN207994901U (en) * | 2018-01-18 | 2018-10-19 | 深圳市富满电子集团股份有限公司 | Power-switching circuit and power supply changeover device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601508A (en) * | 2018-06-12 | 2019-12-20 | 三垦电气株式会社 | Apparatus and method for controlling power converter |
| CN110601508B (en) * | 2018-06-12 | 2021-10-22 | 三垦电气株式会社 | Apparatus and method for controlling power converter |
| CN111199850A (en) * | 2018-11-16 | 2020-05-26 | 中车唐山机车车辆有限公司 | Solid state relay circuit |
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