CN211859937U - Leakage inductance peak lossless absorption circuit of DC-DC converter - Google Patents
Leakage inductance peak lossless absorption circuit of DC-DC converter Download PDFInfo
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- CN211859937U CN211859937U CN201922476951.7U CN201922476951U CN211859937U CN 211859937 U CN211859937 U CN 211859937U CN 201922476951 U CN201922476951 U CN 201922476951U CN 211859937 U CN211859937 U CN 211859937U
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Abstract
The utility model belongs to the technical field of DC-DC power conversion, concretely relates to DC-DC converter leakage inductance peak can't harm absorption circuit. In the leakage inductance spike lossless absorption circuit of the DC-DC converter, a transformer in a converter topology is transferred to a capacitor C2 through a diode D1 and is connected with a detection circuit 1, the detection circuit 1 is connected with a bleeder circuit 2, and is connected with a capacitor C1 of the transformer in the converter topology through the bleeder circuit 2. The beneficial effects are as follows: the connection principle is simple, leakage inductance peak energy is transferred to the input end capacitor, the converter loss can be effectively reduced through the circuit, the conversion efficiency is improved, and the heat dissipation cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of DC-DC power conversion, concretely relates to DC-DC converter leakage inductance peak can't harm absorption circuit.
Background
In the field of DC-DC power conversion, topologies such as flyback and push-pull are adopted, and a voltage spike caused by leakage inductance energy is a problem to be solved. Especially in high power converters, the energy loss due to lossy absorption is not negligible.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a remedy prior art's defect, provide a DC-DC converter leakage inductance peak can't harm absorption circuit.
The utility model discloses a realize through following technical scheme:
a leakage inductance peak lossless absorption circuit of a DC-DC converter is characterized in that a transformer in a converter topology is transferred to a capacitor C2 through a diode D1 and is connected with a detection circuit 1, the detection circuit 1 is connected with a bleeder circuit 2, and the capacitor C1 of the transformer in the converter topology is connected through the bleeder circuit 2.
Further, the capacitor C1 is connected to the wire ground of the transformer in the converter topology.
The utility model has the advantages that: the connection principle is simple, leakage inductance peak energy is transferred to the input end capacitor, the converter loss can be effectively reduced through the circuit, the conversion efficiency is improved, and the heat dissipation cost is reduced.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
Fig. 1 shows an embodiment of the present invention. The utility model relates to a DC-DC converter leakage inductance peak nondestructive absorption circuit, the transformer shifts to on condenser C2 through diode D1 in the converter topology to be connected with detection circuitry 1, detection circuitry 1 connects bleeder circuit 2, is connected through bleeder circuit 2 and the condenser C1 of transformer in the converter topology.
Further, the capacitor C1 is connected to the wire ground of the transformer in the converter topology.
The utility model relates to a DC-DC converter leakage inductance peak damage-free absorption circuit, because transformer primary side leakage inductance can produce the voltage peak at A point in the converter topology, lead to switch tube Q2 inefficacy, the voltage peak that the circuit of this application produced A point shifts to on condenser C2 through diode D1, detection circuitry 1 detects the voltage on the condenser C2, when the voltage is higher than the discharge voltage of expectation, open bleeder circuit 2, with electric energy feedback to condenser C1 on the condenser C2, realized the harmless transfer to the leakage inductance energy.
The present invention is not limited to the above embodiments, and any person should learn to make under the teaching of the present invention and the present invention has the same or similar technical solution, and all fall into the protection scope of the present invention.
The technology, shape and construction parts which are not described in detail in the present invention are all known technology.
Claims (2)
1. A leakage inductance spike lossless absorption circuit of a DC-DC converter is characterized in that a transformer in a converter topology is transferred to a capacitor C2 through a diode D1 and is connected with a detection circuit (1), the detection circuit (1) is connected with a bleeder circuit (2), and the detection circuit is connected with a capacitor C1 of the transformer in the converter topology through the bleeder circuit (2).
2. The leakage inductance spike lossless absorption circuit of the DC-DC converter as claimed in claim 1, wherein said capacitor C1 is connected to the wire ground terminal of the transformer in the converter topology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476951.7U CN211859937U (en) | 2019-12-31 | 2019-12-31 | Leakage inductance peak lossless absorption circuit of DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476951.7U CN211859937U (en) | 2019-12-31 | 2019-12-31 | Leakage inductance peak lossless absorption circuit of DC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211859937U true CN211859937U (en) | 2020-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922476951.7U Active CN211859937U (en) | 2019-12-31 | 2019-12-31 | Leakage inductance peak lossless absorption circuit of DC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211859937U (en) |
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2019
- 2019-12-31 CN CN201922476951.7U patent/CN211859937U/en active Active
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