CN106026688A - Power output circuit having feedback energy - Google Patents
Power output circuit having feedback energy Download PDFInfo
- Publication number
- CN106026688A CN106026688A CN201610508998.5A CN201610508998A CN106026688A CN 106026688 A CN106026688 A CN 106026688A CN 201610508998 A CN201610508998 A CN 201610508998A CN 106026688 A CN106026688 A CN 106026688A
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- Prior art keywords
- power
- switch pipe
- power switch
- transformer unit
- circuit
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
Abstract
The invention relates to a power output circuit having feedback energy, particularly to a power output circuit of a switching power supply. The power output circuit comprises a first rectifying circuit, a filter capacitor, power switch tubes and a transformer unit. A 220-V power-frequency power supply is inputted into the first rectifying circuit; and a positive electrode of the first rectifying circuit and a positive electrode of the filter capacitor are connected to form a working power supply. The circuit is mainly formed by a plurality of power switch tubes and a power conversion transformer unit. The power conversion transformer unit consists of a primary coil, an energy feedback coil, and a power output coil. The multiple power switch tubes and the primary coil of the power conversion transformer unit form a power input loop. Besides, a second rectifying circuit is arranged in the circuit; a leading-out terminal of an energy feedback coil is connected to an alternating-current input terminal of the second rectifying circuit; a positive electrode of the second rectifying circuit is connected with a working power supply; and a power output coil and a load form a power output loop. According to the invention, the leakage inductance in the power conversion transformer and the energy accumulated by the distributed capacitor are fed back to the working power supply for recycling.
Description
Technical field
The present invention relates to a kind of electronic circuit, be related specifically to the power output circuit of a kind of Switching Power Supply.
Background technology
High frequency switch power has high efficiency and miniaturization owing to eliminating Industrial Frequency Transformer, is used widely in commercial production, environmental protection and modern communications field.In the flue gas purification system of station boiler or be easily generated in the workshop of dust, electrostatic (electric dust) precipitator need to be used to carry out dedusting, in electrostatic (electric dust) precipitator device, need the Switching Power Supply of booster type to produce electrostatic；Industrially being applied in the plasma device that plasma ignition, gasifying coal by using plasma, plasma pyrolysis water hydrogen manufacturing, industry harmful substance disposal, Medical Wastes Disposal, consumer waste innocent and energy are disposed, the high-tension electricity needing the Switching Power Supply of booster type to produce carries out striking.
During Switching Power Supply work, the switching tube alternate conduction in high frequency transformer primary side loop or cut-off, make the magnetic core of high frequency transformer produce alternating flux, so that the secondary side of high frequency transformer obtains power output.Owing to high frequency transformer existing leakage inductance and distribution capacity, surge current and peak voltage can be caused at switching tube shutdown moment, leakage inductance and distribution capacity, make switching device damage.What in high frequency transformer, leakage inductance and distribution capacity were accumulated is a kind of harmful energy, and in order to avoid switching device damages, general employing RCD absorbing circuit consumes leakage inductance and the energy of distribution capacity accumulation in transformator.But RCD absorbing circuit not only consumes leakage inductance and the energy of distribution capacity accumulation in transformator, also consumes the magnetization energy of transformator, therefore reduces the efficiency of transformator and increase power consumption simultaneously.
Summary of the invention
The energy back that it is an object of the invention to leakage inductance and distribution capacity in power conversion transformator to be accumulated recycles in working power, realize saving electric energy and reducing the impact to switching device of surge current and peak voltage, improve the efficiency of Switching Power Supply.
A kind of power output circuit with feedback energy of the present invention, including the first rectification circuit, filter capacitor, power switch pipe and transformer unit, 220V power frequency supply is input in the first rectification circuit, the positive pole of the first rectification circuit constitutes working power V+ after being connected with the positive pole of filter capacitor, it is characterized in that main circuit to be made up of multiple power switch pipes and power conversion transformer unit (Ta), wherein, power conversion transformer unit (Ta) is by primary coil, energy back coil (W2) and power output winding (W3) are constituted, multiple power switch pipes constitute power input circuit with the primary coil of power conversion transformer unit (Ta)；Having the second rectification circuit (VD2) in circuit, the leading-out terminal of energy back coil (W2) is connected to the ac input end of the second rectification circuit (VD2), and the positive pole of the second rectification circuit (VD2) is connected to working power V+；By mutual inductance effect, the input current of primary coil senses that power output winding (W3), power output winding (W3) constitute power output loop with load.
In the present invention, power switch pipe is more than two, and the power input circuit of power conversion transformer unit (Ta) is following a kind of frame mode therein:
The first frame mode, power switch pipe includes the first power switch pipe (VT1), second power switch pipe (VT2), 3rd power switch pipe (VT3) and the 4th power switch pipe (VT4), the drain electrode of the first power switch pipe (VT1) and the drain electrode of the second power switch pipe (VT2) are connected to working power V+, the source electrode of the first power switch pipe (VT1) is connected to drain electrode and the head end of power conversion transformer unit (Ta) primary coil of the 3rd power switch pipe (VT3), the source electrode of the second power switch pipe (VT2) is connected to drain electrode and the tail end of power conversion transformer unit (Ta) primary coil of the 4th power switch pipe (VT4), the source electrode of the 3rd power switch pipe (VT3) and the source electrode of the 4th power switch pipe (VT4) are connected to ground wire；
The second frame mode, power switch pipe includes the first power switch pipe (VT1) and the second power switch pipe (VT2), the primary coil of power conversion transformer unit (Ta) has centre cap, the centre cap of power conversion transformer unit (Ta) primary coil is connected to working power V+, the head end of power conversion transformer unit (Ta) primary coil is connected to the drain electrode of the first power switch pipe (VT1), the tail end of power conversion transformer unit (Ta) primary coil is connected to the drain electrode of the second power switch pipe (VT2), the source electrode of the first power switch pipe (VT1) and the source electrode of the second power switch pipe (VT2) are connected to ground wire.
In the present invention, between working power V+ and ground wire, there is varistor (VR).
The present invention applies in switching power unit, and when operating frequency is more than 400 kilocycle, power conversion transformator is air-core transformer, is not required to use magnetic core；When operating frequency is 1-400 kilocycle, power conversion transformator needs use FERRITE CORE.
The operation principle of the present invention is: the first power switch pipe (VT1) and the second power switch pipe (VT2) alternate conduction or cut-off, or the first power switch pipe (VT1), 4th power switch pipe (VT4) and the second power switch pipe (VT2), 3rd power switch pipe (VT3) alternate conduction or cut-off, the power output winding (W3) making power conversion transformer unit (Ta) produces power output, owing to making power conversion transformator exists leakage inductance and distribution capacity, at power switch pipe shutdown moment, leakage inductance and distribution capacity can produce surge current and peak voltage, put aside energy；When the voltage that the energy that leakage inductance and distribution capacity in power conversion transformator have been put aside makes the electromotive force on energy feedback coil (W2) be more than working power V+, power conversion transformator will pass through energy back coil (W2) to working power V+ feedback energy, it is circulated utilization, simultaneously, it is to avoid or reduce surge current and the peak voltage impact to power switch pipe.
The invention has the beneficial effects as follows: a kind of power output circuit with feedback energy of offer, the energy back that leakage inductance and distribution capacity in power conversion transformator are accumulated recycles in working power, realize saving electric energy, and reduce the impact to power switch pipe of surge current and peak voltage, improve the efficiency of Switching Power Supply.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of power output circuit figure with feedback energy of the present invention.
Accompanying drawing 2 is the power output circuit figure that the another kind of the present invention has feedback energy.
Accompanying drawing 3 is the power output circuit figure that another of the present invention has feedback energy.
Accompanying drawing 4 is the power output circuit figure that the present invention applies in the supply unit of extra-high pressure.
nullIn figure: VD1. the first rectification circuit，VD2. the second rectification circuit，VR. varistor，VT1. the first power switch pipe，VT2. the second power switch pipe，VT3. the 3rd power switch pipe，VT4. the 4th power switch pipe，C1. filter capacitor，V+. working power，Ta. power conversion transformer unit，W1-1. the first winding of primary coil，W1-2. the second winding of primary coil，W2. energy back coil，W3. power output winding，Tb-1. the first high-tension transformer unit，Wb-1. the first primary coil，Wc-1. first level high-tension coil，Tb-2. the second high-tension transformer unit，Wb-2. the second primary coil，Wc-2. second subprime high-tension coil，Tb-n. the n-th high-tension transformer unit，Wb-3. the 3rd primary coil，Wc-3. third time level high-tension coil，1. power frequency supply first input end，2. power frequency supply the second input，3. the first power take-off，4. the second power take-off，5. magnetic core，6. the first high-voltage output end，7. the second high-voltage output end.
Detailed description of the invention
Embodiment 1In embodiment shown in Fig. 1, a kind of power output circuit with feedback energy is made up of the first rectification circuit, filter capacitor, the second rectification circuit (VD2), power switch pipe and power conversion transformer unit (Ta), wherein, 220V power frequency supply is input in the first rectification circuit, the positive pole of the first rectification circuit constitutes working power V+ after being connected with the positive pole of filter capacitor, has varistor (VR) between working power V+ and ground wire；Power switch pipe includes the first power switch pipe (VT1), the second power switch pipe (VT2), the 3rd power switch pipe (VT3) and the 4th power switch pipe (VT4)；Power conversion transformer unit (Ta) is made up of first winding (W1-1) of primary coil, second winding (W1-2) of primary coil, energy back coil (W2) and power output winding (W3), first winding (W1-1) of primary coil and energy back coil (W2) carry out coiling in Double-wire parallel wound mode, second winding (W1-2) of primary coil and power output winding (W3) carry out coiling in Double-wire parallel wound mode, and first winding (W1-1) of primary coil is forward connected with second winding (W1-2) of primary coil；nullFirst power switch pipe (VT1)、Second power switch pipe (VT2)、3rd power switch pipe (VT3)、The primary coil of the 4th power switch pipe (VT4) and power conversion transformer unit (Ta) constitutes power input circuit，The drain electrode of the first power switch pipe (VT1) and the drain electrode of the second power switch pipe (VT2) are connected to working power V+，The source electrode of the first power switch pipe (VT1) is connected to drain electrode and the head end of power conversion transformer unit (Ta) primary coil of the 3rd power switch pipe (VT3)，The source electrode of the second power switch pipe (VT2) is connected to drain electrode and the tail end of power conversion transformer unit (Ta) primary coil of the 4th power switch pipe (VT4)，The source electrode of the 3rd power switch pipe (VT3) and the source electrode of the 4th power switch pipe (VT4) are connected to ground wire；Second rectification circuit (VD2) is full bridge rectifier, two leading-out terminals of energy back coil (W2) are connected to two ac input ends of the second rectification circuit (VD2), the positive pole of the second rectification circuit (VD2) is connected to working power V+, and the negative pole of the second rectification circuit (VD2) is connected to ground wire；By mutual inductance effect, the input current of primary coil senses that power output winding (W3), power output winding (W3) constitute power output loop with load.The present embodiment is applied in switching power unit, when operating frequency is 1-400 kilocycle, magnetic core (5) is had in power conversion transformator, magnetic core (5) is that the magnet of two U-iron oxysome materials is to being combined into, first winding (W1-1) of primary coil and energy back coil (W2) are arranged on the same magnetic post of side, and second winding (W1-2) of primary coil and power output winding (W3) are arranged on the same magnetic post of opposite side.
Embodiment 2In embodiment shown in Fig. 2, it is on the basis of first embodiment that another kind has the power output circuit of feedback energy, centre cap is had to draw in energy back coil (W2), second rectification circuit (VD2) is full-wave rectifying circuit, centre cap in energy back coil (W2) is connected to ground wire, two leading-out terminals of energy back coil (W2) are connected to the anode of two rectifier tubes of full-wave rectifying circuit, and the negative electrode of two rectifier tubes of full-wave rectifying circuit is connected to working power V+.Other structure is basically the same as those in the first embodiment, and repeats no more.
Embodiment 3nullIn embodiment shown in Fig. 3，Another power output circuit with feedback energy is on the basis of first embodiment，Centre cap is had to pick out at first winding (W1-1) of power conversion transformer unit (Ta) primary coil with the forward junction point of second winding (W1-2) of primary coil，Its centre cap is connected to working power V+，Power switch pipe includes the first power switch pipe (VT1) and the second power switch pipe (VT2)，The head end of first winding (W1-1) of power conversion transformer unit (Ta) primary coil is connected to the drain electrode of the first power switch pipe (VT1)，The tail end of second winding (W1-2) of power conversion transformer unit (Ta) primary coil is connected to the drain electrode of the second power switch pipe (VT2)，The source electrode of the first power switch pipe (VT1) and the source electrode of the second power switch pipe (VT2) are connected to ground wire.Other structure is basically the same as those in the first embodiment, and repeats no more.
Embodiment 4In embodiment shown in Fig. 4, it it is the power output circuit applied in the supply unit of extra-high pressure of the circuit structure of first embodiment or the 3rd embodiment, wherein, the structure of power conversion transformer unit (Ta) and the connected mode of primary coil and first embodiment or the 3rd embodiment identical, repeats no more.In the present embodiment, the parts constituting load are multiple high-tension transformer unit, the primary coil of multiple high-tension transformer unit is connected to after forward connecting on the power output winding (W3) of power conversion transformer unit (Ta), the secondary high pressure coil of multiple high-tension transformer unit forward connects, during work, high-tension electricity produces respectively on the secondary high pressure coil of multiple high-tension transformer unit, then it is overlapped, formation extra-high pressure exports, to meet the requirement of the distance striking of plasma device.
Claims (3)
1. a power output circuit with feedback energy, including the first rectification circuit, filter capacitor, power switch pipe and transformer unit, 220V power frequency supply is input in the first rectification circuit, the positive pole of the first rectification circuit constitutes working power V+ after being connected with the positive pole of filter capacitor, it is characterized in that main circuit to be made up of multiple power switch pipes and power conversion transformer unit (Ta), wherein, power conversion transformer unit (Ta) is by primary coil, energy back coil (W2) and power output winding (W3) are constituted, multiple power switch pipes constitute power input circuit with the primary coil of power conversion transformer unit (Ta)；Having the second rectification circuit (VD2) in circuit, the leading-out terminal of energy back coil (W2) is connected to the ac input end of the second rectification circuit (VD2), and the positive pole of the second rectification circuit (VD2) is connected to working power V+；By mutual inductance effect, the input current of power conversion transformer unit (Ta) primary coil senses that power output winding (W3), power output winding (W3) constitute power output loop with load.
A kind of power output circuit with feedback energy the most according to claim 1, is characterized in that power switch pipe is more than two, and the power input circuit of power conversion transformer unit (Ta) is following a kind of frame mode therein:
The first frame mode, power switch pipe includes the first power switch pipe (VT1), second power switch pipe (VT2), 3rd power switch pipe (VT3) and the 4th power switch pipe (VT4), the drain electrode of the first power switch pipe (VT1) and the drain electrode of the second power switch pipe (VT2) are connected to working power V+, the source electrode of the first power switch pipe (VT1) is connected to drain electrode and the head end of power conversion transformer unit (Ta) primary coil of the 3rd power switch pipe (VT3), the source electrode of the second power switch pipe (VT2) is connected to drain electrode and the tail end of power conversion transformer unit (Ta) primary coil of the 4th power switch pipe (VT4), the source electrode of the 3rd power switch pipe (VT3) and the source electrode of the 4th power switch pipe (VT4) are connected to ground wire；
The second frame mode, power switch pipe includes the first power switch pipe (VT1) and the second power switch pipe (VT2), the primary coil of power conversion transformer unit (Ta) has centre cap, the centre cap of power conversion transformer unit (Ta) primary coil is connected to working power V+, the head end of power conversion transformer unit (Ta) primary coil is connected to the drain electrode of the first power switch pipe (VT1), the tail end of power conversion transformer unit (Ta) primary coil is connected to the drain electrode of the second power switch pipe (VT2), the source electrode of the first power switch pipe (VT1) and the source electrode of the second power switch pipe (VT2) are connected to ground wire.
A kind of power output circuit with feedback energy the most according to claim 1, is characterized in that there is varistor (VR) between working power V+ and ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508998.5A CN106026688A (en) | 2016-07-03 | 2016-07-03 | Power output circuit having feedback energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508998.5A CN106026688A (en) | 2016-07-03 | 2016-07-03 | Power output circuit having feedback energy |
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| CN106026688A true CN106026688A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610508998.5A Pending CN106026688A (en) | 2016-07-03 | 2016-07-03 | Power output circuit having feedback energy |
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Citations (5)
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| US20100142233A1 (en) * | 2008-12-08 | 2010-06-10 | Industrial Technology Research Institute | Power conversion device and control method thereof |
| CN101841167A (en) * | 2010-05-11 | 2010-09-22 | 英伟力新能源科技(上海)有限公司 | Flyback converter leakage inductance energy absorption feedback circuit of photovoltaic grid-connected inverter |
| CN102064713A (en) * | 2009-11-17 | 2011-05-18 | 上海英孚特电子技术有限公司 | High-efficiency flyback grid-connected photovoltaic inverter |
| CN102075092A (en) * | 2009-11-19 | 2011-05-25 | 上海岩芯电子科技有限公司 | Flyback converter leakage inductance absorption and soft switching control |
| CN205725476U (en) * | 2016-07-03 | 2016-11-23 | 衢州昀睿工业设计有限公司 | A kind of power output circuit with feedback energy |
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2016
- 2016-07-03 CN CN201610508998.5A patent/CN106026688A/en active Pending
Patent Citations (5)
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| US20100142233A1 (en) * | 2008-12-08 | 2010-06-10 | Industrial Technology Research Institute | Power conversion device and control method thereof |
| CN102064713A (en) * | 2009-11-17 | 2011-05-18 | 上海英孚特电子技术有限公司 | High-efficiency flyback grid-connected photovoltaic inverter |
| CN102075092A (en) * | 2009-11-19 | 2011-05-25 | 上海岩芯电子科技有限公司 | Flyback converter leakage inductance absorption and soft switching control |
| CN101841167A (en) * | 2010-05-11 | 2010-09-22 | 英伟力新能源科技(上海)有限公司 | Flyback converter leakage inductance energy absorption feedback circuit of photovoltaic grid-connected inverter |
| CN205725476U (en) * | 2016-07-03 | 2016-11-23 | 衢州昀睿工业设计有限公司 | A kind of power output circuit with feedback energy |
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