CN204361904U - A kind of Multichannel isolating voltage source apparatus - Google Patents
A kind of Multichannel isolating voltage source apparatus Download PDFInfo
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- CN204361904U CN204361904U CN201520037230.5U CN201520037230U CN204361904U CN 204361904 U CN204361904 U CN 204361904U CN 201520037230 U CN201520037230 U CN 201520037230U CN 204361904 U CN204361904 U CN 204361904U
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Abstract
The utility model discloses a kind of Multichannel isolating voltage source apparatus in field of electrical equipment, comprise square wave circuit for generating, single-phase semi-bridge inversion circuit, high frequency transformer, rectification circuit, the utility model medium/high frequency transformer magnetic core creates the magnetic flux of positive and negative both direction in a switch periods, there is not remanent magnetism, this device takes full advantage of magnetic core of transformer and delivers energy, thus transformer size is substantially reduced under guarantee power output prerequisite, save space, ensure that the efficiency of Energy Transfer simultaneously, can be used for the driver accessory power supply of semiconductor switch device.
Description
Technical field
The utility model relates to a kind of power supply, particularly a kind of isolated voltage source.
Background technology
In prior art, traditional multipath isolated power adopts Multiple Output Flyback Converter to realize, and adopts the problem of this structure to be: 1. in fluctuation of load situation, and there is bad coupling on each road, output voltage quality variation between exporting; 2. do not make full use of transformer transferring energy.
Utility model content
The purpose of this utility model is to provide a kind of Multichannel isolating voltage source apparatus, ensures the stability of transformer energy transmission, improve the efficiency of Energy Transfer, and its size is less, conserve space.
The purpose of this utility model is achieved in that a kind of Multichannel isolating voltage source apparatus, comprises
Square wave circuit for generating, drives single-phase semi-bridge inversion circuit in order to send square wave;
Single-phase semi-bridge inversion circuit, in order to drive high frequency transformer former limit input winding;
High frequency transformer, in order to isolate multiple-channel output and transferring energy;
Rectification circuit, in order to high frequency transformer is exported winding produce alternate voltage rectification after export steady direct voltage;
Described single-phase semi-bridge circuit comprises direct voltage source, a MOSFET controls switch entirely, the 2nd MOSFET controls switch and output capacitance entirely, one MOSFET is entirely controlled switch drain and is connected with direct voltage source, one MOSFET is entirely controlled switch source and is entirely controlled switch drain with the 2nd MOSFET and be connected, 2nd MOSFET controls switch source ground connection entirely, 2nd MOSFET is entirely controlled switch drain and is also inputted winding one end by output capacitance and high frequency transformer and be connected, high frequency transformer input winding other end ground connection; Described square wave circuit for generating divides two-way output, and a road exports termination the one MOSFET and entirely controls switch, and another road output meets the 2nd MOSFET through inverter and entirely controls switch; High frequency transformer comprises the first output winding, second and exports winding, the 3rd output winding, the 4th output winding, first exports winding, second exports winding and inputs winding in the same way, 3rd exports winding, the 4th exports winding and inputs winding reverse, first exports winding output is connected to the first diode and the first filter capacitor, second exports winding output is connected to the second diode and the second filter capacitor, 3rd exports winding output is connected to the 3rd diode and the 3rd filter capacitor, and the 4th exports winding output is connected to the 4th diode and the 4th filter capacitor.
During utility model works, when square wave circuit for generating exports high level, one MOSFET is entirely controlled switch and is closed, 2nd MOSFET is entirely controlled switch and is disconnected, now direct voltage source is to output capacitance and the charging of high frequency transformer input winding, high frequency transformer input winding has electric current to flow into, therefore export on winding at the first output winding and second that high frequency transformer secondary is of the same name and produce induced potential, then the first diode and the second diode forward conducting, 3rd diode and the cut-off of the 4th diode reverse, thus, first electric capacity and the second electric capacity are charged, two corresponding outputs have voltage to export,
When square wave circuit for generating output low level, one MOSFET is entirely controlled switch and is disconnected, it is open-minded that 2nd MOSFET controls switch entirely, now output capacitance inputs winding charge to high frequency transformer, voltage can decline gradually, and high frequency transformer input winding voltage and output capacitance voltage etc. is oppositely large, and have electric current flowing in the other direction, therefore export on winding at the 3rd output winding and the 4th that secondary is of the same name and produce induced potential, then the first diode and the cut-off of the second diode reverse, 3rd diode and the 4th diode forward conducting, thus, export the 3rd electric capacity and the 4th electric capacity is charged, two corresponding outputs have voltage to export, now the first electric capacity and output end voltage corresponding to the second electric capacity maintain by the first electric capacity and the second electric capacity,
When square wave circuit for generating exports high level again, repeat above-mentioned situation.Export the first electric capacity and the second electric capacity is charged, corresponding output has voltage to export, and now the 3rd electric capacity and output end voltage corresponding to the 4th electric capacity maintain by the 3rd electric capacity and the 4th electric capacity.
The former limit of the utility model medium/high frequency transformer does not have DC bias current to flow in a switch periods, the magnetic flux that this alternating current induces also is alternation and is not biased, therefore, high frequency transformer magnetic core creates the magnetic flux of positive and negative both direction in a switch periods, there is not remanent magnetism, this device takes full advantage of magnetic core of transformer and delivers energy, thus substantially reduces transformer size under guarantee power output prerequisite, save space, ensure that the efficiency of Energy Transfer simultaneously.The utility model can be used for the driver accessory power supply of semiconductor switch device.
In order to improve the stability of this device work further, a described MOSFET is entirely controlled switch ends and is parallel with the 5th diode, and described 2nd MOSFET is entirely controlled switch ends and is parallel with the 6th diode.
Accompanying drawing explanation
Fig. 1 is the utility model main circuit principle schematic.
Fig. 2 is square wave circuit for generating schematic diagram in the utility model.
Embodiment
A kind of Multichannel isolating voltage source apparatus as shown in Figure 1-2, comprise square wave circuit for generating, single-phase semi-bridge inversion circuit, high frequency transformer T, rectification circuit, single-phase semi-bridge circuit comprises direct voltage source Vs, one MOSFET controls switch S 1 entirely, 2nd MOSFET controls switch and output capacitance C entirely, one MOSFET is entirely controlled switch S 1 and is drained and to be connected with direct voltage source Vs, one MOSFET is entirely controlled switch S 1 source electrode and is entirely controlled switch drain with the 2nd MOSFET and be connected, 2nd MOSFET controls switch source ground connection entirely, 2nd MOSFET is entirely controlled switch drain and is also inputted winding L 1 one end by output capacitance C and high frequency transformer T and be connected, high frequency transformer T inputs winding L 1 other end ground connection, square wave circuit for generating divides two-way output, and a road exports termination the one MOSFET and entirely controls switch S 1, and another road output meets the 2nd MOSFET through inverter and entirely controls switch, high frequency transformer T comprises the first output winding L 2, second exports winding L 3, 3rd exports winding L 4, 4th exports winding L 5, first exports winding L 2, second exports winding L 3 and inputs winding L 1 in the same way, 3rd exports winding L 4, 4th output winding L 5 is reverse with input winding L 1, first exports winding L 2 output is connected to the first diode D1 and the first filter capacitor C1, second exports winding L 3 output is connected to the second diode D2 and the second filter capacitor C2, 3rd exports winding L 4 output is connected to the 3rd diode D3 and the 3rd filter capacitor C3, 4th exports winding L 5 output is connected to the 4th diode D4 and the 4th filter capacitor C4, one MOSFET is entirely controlled switch S 1 two ends and is parallel with the 5th diode, 2nd MOSFET is entirely controlled switch ends and is parallel with the 6th diode.
During utility model works, when square wave circuit for generating exports high level, one MOSFET is entirely controlled switch S 1 and is closed, 2nd MOSFET is entirely controlled switch and is disconnected, now direct voltage source Vs charges to output capacitance C and high frequency transformer T input winding L 1, high frequency transformer T inputs winding L 1 has electric current to flow into, therefore in of the same name first the exporting winding L 2 and second and export in winding L 3 and produce induced potential of high frequency transformer T secondary, then the first diode D1 and the second diode D2 forward conduction, 3rd diode D3 and the 4th diode D4 oppositely ends, thus, first electric capacity and the second electric capacity are charged, two corresponding outputs have voltage to export,
When square wave circuit for generating output low level, one MOSFET is entirely controlled switch S 1 and is disconnected, it is open-minded that 2nd MOSFET controls switch entirely, now output capacitance C discharges to high frequency transformer T input winding L 1, voltage can decline gradually, and high frequency transformer T inputs winding L 1 voltage and output capacitance C voltage etc. greatly oppositely, and have electric current flowing in the other direction, therefore export in winding L 5 at the 3rd output winding and the 4th that secondary is of the same name and produce induced potential, then the first diode D1 and the second diode D2 oppositely ends, 3rd diode D3 and the 4th diode D4 forward conduction, thus, export the 3rd filter capacitor C3 and the 4th filter capacitor C4 is charged, two corresponding outputs have voltage to export, the output end voltage that now the first filter capacitor C1 and the second filter capacitor C2 is corresponding maintains by the first electric capacity and the second electric capacity,
When square wave circuit for generating exports high level again, repeat above-mentioned situation, first filter capacitor C1 and the second filter capacitor C2 is charged, corresponding output has voltage to export, and the output end voltage that now the 3rd filter capacitor C3 and the 4th filter capacitor C4 is corresponding maintains by the 3rd filter capacitor C3 and the 4th filter capacitor C3.
The utility model is not limited to above-described embodiment; on the basis of technical scheme disclosed in the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some to some technical characteristics wherein to replace and distortion, these are replaced and are out of shape all in protection range of the present utility model.
Claims (2)
1. a Multichannel isolating voltage source apparatus, is characterized in that, comprises
Square wave circuit for generating, drives single-phase semi-bridge inversion circuit in order to send square wave;
Single-phase semi-bridge inversion circuit, in order to drive high frequency transformer former limit input winding;
High frequency transformer, in order to isolate multiple-channel output and transferring energy;
Rectification circuit, in order to high frequency transformer is exported winding produce alternate voltage rectification after export steady direct voltage;
Described single-phase semi-bridge circuit comprises direct voltage source, a MOSFET controls switch entirely, the 2nd MOSFET controls switch and output capacitance entirely, one MOSFET is entirely controlled switch drain and is connected with direct voltage source, one MOSFET is entirely controlled switch source and is entirely controlled switch drain with the 2nd MOSFET and be connected, 2nd MOSFET controls switch source ground connection entirely, 2nd MOSFET is entirely controlled switch drain and is also inputted winding one end by output capacitance and high frequency transformer and be connected, high frequency transformer input winding other end ground connection; Described square wave circuit for generating divides two-way output, and a road exports termination the one MOSFET and entirely controls switch, and another road output meets the 2nd MOSFET through inverter and entirely controls switch; High frequency transformer comprises the first output winding, second and exports winding, the 3rd output winding, the 4th output winding, first exports winding, second exports winding and inputs winding in the same way, 3rd exports winding, the 4th exports winding and inputs winding reverse, first exports winding output is connected to the first diode and the first filter capacitor, second exports winding output is connected to the second diode and the second filter capacitor, 3rd exports winding output is connected to the 3rd diode and the 3rd filter capacitor, and the 4th exports winding output is connected to the 4th diode and the 4th filter capacitor.
2. a kind of Multichannel isolating voltage source apparatus according to claim 1, is characterized in that, a described MOSFET is entirely controlled switch ends and is parallel with the 5th diode, and described 2nd MOSFET is entirely controlled switch ends and is parallel with the 6th diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037230.5U CN204361904U (en) | 2015-01-20 | 2015-01-20 | A kind of Multichannel isolating voltage source apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037230.5U CN204361904U (en) | 2015-01-20 | 2015-01-20 | A kind of Multichannel isolating voltage source apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN204361904U true CN204361904U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520037230.5U Expired - Fee Related CN204361904U (en) | 2015-01-20 | 2015-01-20 | A kind of Multichannel isolating voltage source apparatus |
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| CN (1) | CN204361904U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901034A (en) * | 2019-04-02 | 2019-06-18 | 国网陕西省电力公司电力科学研究院 | Power cable local discharge detection device and appraisal procedure based on multi-stag power supply and series resonance |
| CN112737392A (en) * | 2020-12-29 | 2021-04-30 | 大禹电气科技股份有限公司 | Isolated driving power supply for H-bridge inverter circuit |
-
2015
- 2015-01-20 CN CN201520037230.5U patent/CN204361904U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901034A (en) * | 2019-04-02 | 2019-06-18 | 国网陕西省电力公司电力科学研究院 | Power cable local discharge detection device and appraisal procedure based on multi-stag power supply and series resonance |
| CN112737392A (en) * | 2020-12-29 | 2021-04-30 | 大禹电气科技股份有限公司 | Isolated driving power supply for H-bridge inverter circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20200120 |