Zero-voltage turn-off and zero-current turn-on high-gain Zeta converter

A zero-voltage turn-off and converter technology, which is applied in the direction of conversion equipment, electrical components, and output power conversion devices without intermediate conversion to AC, can solve the problems of increased switching loss, switching loss, and impact, and achieve the elimination of switching The effect of eliminating the break loss and eliminating the turn-on loss

Pending Publication Date: 2021-11-23
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Switching loss problem: During the switching process of the power switch tube, the voltage and current of the power switch tube are not zero, and there is an overlapping area, which is the switching loss of the power switch tube
There is a linear relationship between switching loss and switching frequency. After the switching frequency increases, the switching loss will increase significantly.
[0004] (2) EMI (Electromagnetic Interfe

Method used

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  • Zero-voltage turn-off and zero-current turn-on high-gain Zeta converter
  • Zero-voltage turn-off and zero-current turn-on high-gain Zeta converter

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Embodiment

[0080] Such as figure 2 As shown, taking the example of including a coat unit:

[0081] A zero-voltage turn-off zero-current turn-on high-gain Zeta converter includes a traditional Zeta converter, a coat unit and an auxiliary circuit. Wherein, a traditional Zeta converter includes two inductors L1, L2, a power switch S1, a diode D1 and two capacitors C1, C2. The first garment unit contains an inductor L11, two capacitors C11, C12 and a diode D11. The auxiliary circuit part includes a zero-current auxiliary inductor Lr, an auxiliary inductor Ls, a zero-voltage auxiliary capacitor Cr, and three diodes D2, D3, and D4. Its circuit connection relationship is:

[0082] The drain of the power switch tube S1 is connected to the positive pole of the input power supply, the source of the power switch tube S1 is respectively connected to one end of the capacitor C1, one end of the inductor L1, and one end of the zero-voltage capacitor Cr in the auxiliary circuit; the other end of the...

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Abstract

The invention discloses a zero-voltage turn-off and zero-current turn-on high-gain Zeta converter. The converter comprises a main circuit and an auxiliary circuit. the main circuit comprises a Zeta converter, at least one coat unit and an auxiliary unit. The Zeta converter comprises an inductor L1, an inductor L2, a power switch tube S1, a diode D1, a capacitor C1 and a capacitor C2. The auxiliary circuit comprises a zero-current inductor Lr, an auxiliary inductor Ls, a zero-voltage capacitor Cr and diodes D2, D3 and D4. According to the zero-voltage turn-off and zero-current turn-on high-gain Zeta converter, zero-voltage turn-off and zero-current turn-on of the power switch tube are realized through the auxiliary circuit, and the switching loss of the power switch tube in the circuit is reduced.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a high-gain Zeta converter with zero-voltage turn-off and zero-current turn-on. Background technique [0002] In the existing switching power supply technology, the Zeta coat circuit achieves high voltage gain very well, but in the high-gain DC / DC converter, in order to reduce the cost of the converter and increase the power density of the converter, it is necessary to improve the converter However, it is still difficult to realize the high-frequency operation of the converter. The main reason is that as the operating frequency of the converter increases, the switching loss of the switching tube will increase accordingly, which will lead to a decrease in the working efficiency of the converter and an increase in heat generation. In addition, the radiator volume and weight also increase. The increase in switching frequency mainly produces the following two problems: [0003] (1) Switching l...

Claims

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Application Information

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IPC IPC(8): H02M3/07H02M1/08H02M1/44
CPCH02M3/07H02M1/083H02M1/44
Inventor 邾玢鑫蓝海王凯宏支树播杨楠李振华
Owner CHINA THREE GORGES UNIV
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