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A Transformer Isolation Complementary Drive Circuit with Adjustable Dead Zone

A complementary drive and transformer technology, which is applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of power switch tube straight-through, transformer isolation and complementary drive dead time cannot be adjusted, etc.

Active Publication Date: 2017-09-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem in the prior art that the dead time of the transformer isolation complementary drive cannot be adjusted and the problem that the power switch tube is passed through when the driving pulse of the driving circuit is turned off

Method used

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  • A Transformer Isolation Complementary Drive Circuit with Adjustable Dead Zone
  • A Transformer Isolation Complementary Drive Circuit with Adjustable Dead Zone
  • A Transformer Isolation Complementary Drive Circuit with Adjustable Dead Zone

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing, the implementation of the present invention is described in further detail:

[0033] figure 1 It is a traditional drive circuit before, and its working principle will not be described in detail here. figure 2 , image 3 They are the schematic diagrams of driving waveforms when it works normally and the schematic diagrams of driving waveforms when the driving pulse input is turned off.

[0034] The invention is mainly used in switching power supplies to drive two power switching tubes that need complementary conduction.

[0035] Such as Figure 4 As shown, the driving circuit of the present invention mainly includes the primary side of the driving circuit and symmetrically arranged secondary side driving circuit 1 and secondary side driving circuit 2. The primary side of the driving circuit includes a winding N1, a capacitor C1 and an anti-shoot-through circuit 1. The winding N1 is connected in series with the capacito...

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Abstract

The invention discloses a transformer isolation and complementary drive circuit with adjustable dead zone, which comprises: a drive transformer; a DC blocking capacitor; a bootstrap circuit; an acceleration shutdown circuit; a dead zone circuit; The dead zone circuit of the present invention works when the driving pulse becomes high level, delays the driving output response, and effectively solves the problem that the traditional transformer isolation complementary driving circuit cannot add the dead zone and adjust the dead zone time. In addition, in view of the fact that the energy of the DC blocking capacitor and the bootstrap capacitor of the traditional drive circuit cannot be discharged in time, and there is a phenomenon of power switch tube shoot-through when the drive is turned off, the shoot-through problem is effectively avoided by adding an anti-shoot-through circuit. The invention has strong practical value.

Description

technical field [0001] The invention relates to a transformer isolation complementary drive circuit, in particular to a transformer isolation complementary drive circuit with adjustable dead zone. Background technique [0002] Switching power supply has been widely used, and the driving circuit is a very important part of switching power supply. Due to the needs of the power topology itself or for safety considerations, it is often necessary to isolate the driving pulse from the control circuit from the power switch tube. [0003] Pulse transformer isolation is a commonly used form of isolation for power device drive circuits. It not only has a simple structure, does not need to provide an isolated power supply, but also can transmit pulse signals without delay, which meets the electrical isolation, rapidity and drive capability of the drive circuit. Requirements, so it is widely used in isolated drive circuits. [0004] In some common active clamp circuit topologies, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H02M1/38
CPCH02M1/38H02M1/385
Inventor 钱彬刘华吾魏涛胡海兵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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