Soft switching Boost topology circuit

A topology circuit and soft switching technology, applied in electrical components, regulating electrical variables, high-efficiency power electronic conversion, etc., can solve problems such as low conversion efficiency and electromagnetic interference, achieve simple control methods, reduce EMI, and improve energy conversion. The effect of efficiency

Active Publication Date: 2014-02-19
CHONGQING TELECOMMUNICATION INSTITUTE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a soft-switching Boost topology circuit, which is used to solve the problems of low conversion efficiency and serious electromagnetic interference (EMI) in the Boost topology circuit in the prior art

Method used

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Embodiment 1

[0027] Please refer to figure 2 , shows a structural diagram of a soft-switching Boost topology circuit in a specific embodiment of the present invention, the circuit includes a capacitor C in , inductance L 1 , MOS tube Q 1 , Diode D 0 and capacitance C 0 , the diode D 0 The anode is connected to the resonance unit 5, and the diode D 0 cathode connected to the capacitor C 0 positive terminal, the capacitor C 0 The negative terminal of the ground, the capacitor C in Both ends of the input voltage 1 are connected, while the capacitor C in The positive terminal of the inductor L is connected 1 at one end, the inductance L 1 The other end is connected to the MOS transistor Q 1 drain; wherein the resonant unit 5 includes a coupled inductor L 2 with L 3 , capacitance C 1 , capacitance C 2 , Diode D 1 and diode D 2 , the coupled inductance L 2 Nominal terminal with the inductance L 1 The other end of the capacitor C 2 The anode of the MOS tube is connected to th...

Embodiment 2

[0038] In addition, the present invention also provides another specific embodiment of the soft-switching Boost topology circuit, please refer to Figure 4 , shows a structure diagram of a soft-switching Boost topology circuit in another specific embodiment of the present invention, the difference from the first embodiment is that each element in the resonance unit 5 is different from the components outside the resonance unit 5 The connection relationship of other electronic components is slightly different, specifically: the resonant unit 5 includes a coupling inductor L 2 with L 3 , capacitance C 1 , capacitance C 2 , Diode D 1 and diode D 2 , the coupled inductance L 2 Nominal terminal with the capacitor C 2 The anode of the MOS tube is connected to the drain, and the coupled inductor L 2 terminal with the same name as the inductor L 1 The other end of the diode D 1 cathode, the capacitor C 1 the anode of the diode D 0 connected to the anode of the capacitor C 2...

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Abstract

The invention provides a soft switching Boost topology circuit comprising a Boost circuit and a resonance unit. The Boost circuit comprises an input unit connected with external input voltage, a boosting unit connected with the input unit, a switch unit connected with the boosting unit, and an output unit for outputting the input voltage after the input voltage is processed by the soft switching Boost topology circuit. The resonance unit is connected to the boosting unit, the switch unit and the output unit and used for achieving zero-current connection and zero-voltage disconnection of the switch unit. The soft switching Boost topology circuit has the advantages of being simple in structure, high in conversion efficiency and small in electromagnetic interference.

Description

technical field [0001] The invention relates to the field of DC / DC conversion and power factor correction, in particular to a Boost circuit. Background technique [0002] Boost topology circuits are widely used in DC / DC conversion and power factor correction (PFC) and other fields. The switching loss and output diode reverse recovery current of traditional hard-switching Boost topology circuits will generate serious electromagnetic disturbances while affecting conversion efficiency. Interference (Electromagnetic Interference referred to as EMI). [0003] Therefore, in the prior art, a soft-switching Boost topology circuit is used to improve electromagnetic interference. Although there are many types of implementations for the soft-switching Boost topology circuit, there are more or less problems in all of them. For example, the soft switching of the Boost topology circuit is realized by adding switching tubes and passive devices, which improves the electromagnetic interfer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155H02M1/44
CPCY02B70/10
Inventor 詹天文张颖超聂金铜钱希森金丽萍
Owner CHONGQING TELECOMMUNICATION INSTITUTE
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