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A low-loss drive circuit suitable for zero-voltage turn-on mosfet

A zero-voltage turn-on and driving circuit technology, applied in electronic switches, high-efficiency power electronic conversion, electrical components, etc., can solve the problems of high cost and large driving loss, and achieve the effect of low cost, small driving loss and simple realization.

Active Publication Date: 2020-10-30
BEIJING MECHANICAL EQUIP INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a low-loss drive circuit suitable for zero-voltage turn-on MOSFETs, in order to solve the problems of large drive loss and high cost in zero-voltage turn-on MOSFET drive circuits in the prior art

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  • A low-loss drive circuit suitable for zero-voltage turn-on mosfet
  • A low-loss drive circuit suitable for zero-voltage turn-on mosfet
  • A low-loss drive circuit suitable for zero-voltage turn-on mosfet

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Embodiment Construction

[0043] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention, but not to limit the scope of the present invention.

[0044] A specific embodiment of the present invention discloses a low-loss drive circuit suitable for zero-voltage turn-on MOSFET, the flow chart is as follows figure 1 As shown, the driving circuit is composed of a driving signal input terminal, a transformer excitation circuit, a driving transformer, and a charging and discharging control circuit.

[0045] The drive signal input end is connected to the transformer excitation circuit, the output end of the transformer excitation circuit is connected to the primary winding of the drive transformer, and the secondary winding of the drive transformer is ...

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Abstract

The invention relates to a low-loss drive circuit suitable for zero-voltage turn-on MOSFET, which belongs to the technical field of drive circuits and solves the problems of large drive loss and high cost in the zero-voltage turn-on MOSFET drive circuit in the prior art. The drive circuit is composed of a drive signal input terminal, a transformer excitation circuit, a drive transformer, and a charge and discharge control circuit, wherein the drive signal input terminal is connected to the transformer excitation circuit, and the output terminal of the transformer excitation circuit is connected to the primary winding of the drive transformer. The secondary winding of the drive transformer is connected to the charge and discharge control circuit; the output port 1 and the output port 2 of the charge and discharge control circuit are respectively used to connect with the gate and source of the zero-voltage turn-on MOSFET. The driving circuit of the invention is simple to realize, has small driving loss and low cost, and is especially suitable for the isolated driving requirements of MOSFETs in ZVS topological structures such as LLC.

Description

technical field [0001] The invention relates to the technical field of drive circuits, in particular to a low-loss drive circuit suitable for zero-voltage turn-on MOSFETs. Background technique [0002] With the development of power electronics technology, switching power supply has been widely researched and applied. At the same time, most occasions also put forward higher requirements for switching power supply: higher switching frequency, higher conversion efficiency, smaller size, Lower electromagnetic radiation, etc. [0003] The zero-voltage turn-on (ZVS) soft switching technology based on power MOSFET is a technical approach that can well solve the above problems. It utilizes the characteristic that MOSFET is more suitable for zero-voltage turn-on to realize the soft switching of power switch tubes. [0004] The existing driving circuit of zero-voltage turn-on MOSFET has the problems of large driving loss and high cost. Contents of the invention [0005] In view of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H03K17/691
CPCH02M1/08H03K17/691H03K2217/0036H03K2217/0081H02M1/0058Y02B70/10
Inventor 赵鑫杨帆郭鑫张斌李力生
Owner BEIJING MECHANICAL EQUIP INST