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Active gate control circuit and IGBT electromagnetic interference inhibition method thereof

A control circuit and pole control technology, applied in the direction of electrical components, electronic switches, pulse technology, etc., can solve problems such as increased failure rate, failure to meet electromagnetic compatibility standards, and decreased system reliability, so as to suppress electromagnetic interference and have versatility , the effect of improving work efficiency and stability

Active Publication Date: 2017-02-22
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide an active gate control circuit and its IGBT electromagnetic interference suppression method, which solves the problems that electromagnetic interference affects system reliability, increases failure rate, and cannot meet electromagnetic compatibility standards. It is a circuit with simple structure , easy to operate, and has a promising structure for commercial use, and through the voltage V between the collector and emitter CE The feedback network limits the voltage overshoot of power semiconductor devices, which can achieve the purpose of reducing electromagnetic interference noise

Method used

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  • Active gate control circuit and IGBT electromagnetic interference inhibition method thereof
  • Active gate control circuit and IGBT electromagnetic interference inhibition method thereof
  • Active gate control circuit and IGBT electromagnetic interference inhibition method thereof

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Embodiment

[0042] Embodiment: a kind of active gate control circuit (see figure 1 , figure 2 ), including a PWM unit, a resistor Rb, a resistor Rg and an IGBT, characterized in that it includes a voltage feedback control circuit unit, an active voltage clamping circuit unit 3, a high-speed high-gain amplifier unit 1 and a gate drive power amplifier unit 2; wherein , the active gate control circuit is connected between the IGBT gate G terminal and the collector C terminal; the input terminal of the gate drive power amplifier unit 2 is connected to one end of the resistor Rb, and its output terminal is connected to one end of the resistor Rb through the resistor Rg The gate G terminal of the IGBT is connected; the other end of the resistor Rb receives the voltage signal V from the PWM unit I The input end of the high-speed high-gain amplifier unit 1 is connected to the output end of the voltage feedback control circuit unit, and its output end is connected to one end of the resistor Rb c...

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Abstract

An active gate control circuit provided with the invention comprises a voltage feedback control circuit unit, an active voltage clamping circuit unit, a high-speed and high-gain amplifier and a gate driving power amplifier unit. The method comprises signal input, IGBT (Insulated Gate Bipolar Transistor) closure, AGC (Active Gate Control) action and hybrid interference measurement and analysis. The IGBT electromagnetic interference inhibition method thereof is simple in circuit structure, easy to realize, high in work efficiency and stability, low in switching loss and high in accurate degree, can inhibit the electromagnetic interference and has the universality for the power semiconductor device controlled by a switch.

Description

[0001] (1) Technical field: [0002] The present invention relates to an electromagnetic interference suppression technology for power semiconductor devices, in particular to an AGC (Active Gate Control, referred to as AGC, active gate control) circuit and its IGBT (Insulated Gate Bipolar Transistor, referred to as IGBT, insulated gate bipolar transistor) Electromagnetic Interference Suppression Methods. [0003] (two) background technology: [0004] With the continuous development of power electronics technology, the role of power electronics systems in modern industrial fields is gradually obvious, such as motor drives, electric vehicles, and solar and wind energy and other fields. With the continuous expansion of the application field of power electronic system, the electromagnetic interference generated by it has become a research hotspot. Therefore, it is very necessary to study the suppression technology of the system EMI (Electromagnetic interference, referred to as EMI...

Claims

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Application Information

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IPC IPC(8): H03K17/567
CPCH03K17/567
Inventor 杜明星郑琦琦魏克新
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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