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Interleaved ZVZCS high-boost DC/DC converter

A high-boost and converter technology, which is used in high-efficiency power electronic conversion, conversion of DC power input to DC power output, instruments, etc. Achieve the effect of reducing turn-on and turn-off losses, low cost, and improved work efficiency

Active Publication Date: 2019-07-19
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem of the present invention is that all the switching tubes of the existing DC / DC converter are in the hard switching state, the working efficiency of the converter is low, and there is a problem that the switching tubes are turned on and off.

Method used

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  • Interleaved ZVZCS high-boost DC/DC converter
  • Interleaved ZVZCS high-boost DC/DC converter
  • Interleaved ZVZCS high-boost DC/DC converter

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Embodiment Construction

[0025] like figure 1 As shown, an interleaved parallel ZVZCS high boost DC / DC converter, including inductor L 1 ,inductance L 2 , switch tube S 1 , switch tube S 2 , a passive snubber circuit, a first voltage multiplication unit, a second voltage multiplication unit, the passive snubber circuit includes a diode D 1 , Diode D 2 , Diode D 3 , Diode D 4 , Diode D 5 , Diode D 6 ,capacitance C 1 ,capacitance C 2 ,inductance L S1 ,inductance L S2 , the first voltage multiplier unit consists of a diode D 7 , Diode D 8 ,capacitance C 1a ,capacitance C 1b , the second voltage multiplier unit consists of a diode D 9 , Diode D 10 ,capacitance C 2a ,capacitance C 2b .

[0026] inductance L 1 One end with DC power supply E The positive pole of the connection, the other end is respectively connected with the switch tube S 1 Drain, Diode D 1Anode connection.

[0027] inductance L 2 One end with DC power supply E The positive pole of the connection, the...

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Abstract

The invention discloses an interleaved ZVZCS high-boost DC / DC converter. The converter comprises an inductor L1, an inductor L2, a switch tube S1, a switch tube S2, a passive buffer circuit, a first voltage multiplication unit and a second voltage multiplication unit, wherein the passive buffer circuit comprises a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, a capacitor C1, a capacitor C2, an inductor LS1 and an inductor LS2; the first voltage multiplication unit comprises a diode D7, a diode D8, a capacitor C1a and a capacitor C1b; and the second voltage multiplier unit comprises a diode D9, a diode D10, a capacitor C2a and a capacitor C2b. An auxiliary circuit is added, so that soft switching of the switch tube S1 and S2 is realized, the turn-on and turn-off lossis reduced, and the working efficiency of the converter is improved; and the auxiliary circuit does not contain active elements, is relatively simple in topological structure and low in cost, and does not influence a control strategy and the performance of the original converter.

Description

technical field [0001] The invention belongs to the field of DC / DC converters, in particular to an interleaved parallel ZVZCS high boost DC / DC converter. Background technique [0002] Photovoltaic power generation has developed rapidly in recent years. Due to the low output voltage of photovoltaic cells, it is difficult to directly provide DC power that meets the voltage requirements for the inverter. High-gain DC / DC converters have been widely used in it. However, most existing converters of this type have not implemented soft switching, and there is a problem of large turn-on and turn-off losses of the switch tube. attached figure 2 Shown is a high-gain DC / DC converter based on the voltage gain unit. Compared with the traditional Boost converter, it has the advantages of high gain ratio and low voltage stress of semiconductor devices. But all the switching tubes in this converter are in the hard switching state, so the working efficiency of the converter is low. Conten...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M1/00
CPCH02M1/00H02M3/158H02M1/0058Y02B70/10
Inventor 邾玢鑫黄杨王辉杨楠佘小莉
Owner CHINA THREE GORGES UNIV