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An igbt drive circuit and igbt circuit

A drive circuit, bridge drive circuit technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problem of straight-through of the upper and lower bridge arms, and achieve the effect of improving stability

Active Publication Date: 2022-04-19
SHENZHEN HPMONT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide an IGBT drive circuit and an IGBT circuit, which solves the problem of direct communication between the upper and lower bridge arms in the IGBT circuit

Method used

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  • An igbt drive circuit and igbt circuit
  • An igbt drive circuit and igbt circuit
  • An igbt drive circuit and igbt circuit

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Experimental program
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Embodiment Construction

[0028] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. Wherein, similar elements in different implementations adopt associated similar element numbers. In the following implementation manners, many details are described for better understanding of the present application. However, those skilled in the art can readily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the application are not shown or described in the description, this is to avoid the core part of the application being overwhelmed by too many descriptions, and for those skilled in the art, it is necessary to describe these operations in detail Relevant operations are not necessary, and they can fully understand the relevant operations according to the description in the specification and genera...

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Abstract

The invention discloses an IGBT driving circuit and an IGBT circuit, including an upper bridge driving circuit and a lower bridge driving circuit. Since the lower bridge driving circuit provides a positive voltage through the first positive voltage supply terminal to drive the lower bridge arm IGBT to conduct, and then through the first positive voltage supply terminal, the lower bridge arm IGBT is turned on. A negative voltage supply terminal provides negative voltage to drive the lower bridge arm IGBT to turn off quickly. In addition, the upper bridge drive circuit generates positive voltage to drive the upper bridge arm IGBT to turn on by charging the first capacitor, and then generates negative voltage by charging the second capacitor. Driving the upper bridge arm IGBT to turn off quickly avoids the situation that the upper and lower bridge arms are directly connected in the IGBT circuit, and improves the stability of the IGBT circuit.

Description

technical field [0001] The invention relates to the technical field of IGBT drive control, in particular to an IGBT drive circuit and an IGBT circuit. Background technique [0002] The full name of IGBT is Insulated Gate Bipolar Transistor (Insulated Gate Bipolar Transistor), which is a composite fully-controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate Field Effect Transistor). Due to its advantages of small driving power and low saturated conduction voltage, it is very suitable for the conversion system with a DC voltage of 600V and above, such as AC motors, frequency converters, switching power supplies, lighting circuits, traction drives and other fields. Among them, the design of the IGBT drive circuit is very important for the application of the IGBT. At present, most of the common IGBT drive circuits are bootstrap drive zero-voltage turn-off. There is no negative voltage shutdown in this way, coupled with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/092
CPCH02M1/092
Inventor 董文喜彭博唐鹏曹力研
Owner SHENZHEN HPMONT TECH