Short-circuit protection circuit of insulated gate bipolar translator (IGBT) of high-power frequency conversion device

Abstract

The invention discloses a short-circuit protection circuit of an insulated gate bipolar translator (IGBT) of a high-power frequency conversion device. The short-circuit protection circuit of the IGBT comprises an isolation driving circuit, wherein an input end of the isolation driving circuit is connected with a pulse width modulation (PWM) control signal source; and the isolation driving circuit comprises a first isolation driving chip U01, a seventh resistor R07, a second diode D02, a third resistor R03, a first triode Q01, a fifth resistor R05 and a sixth resistor R06. The short-circuit protection circuit of the IGBT also comprises a short-circuit detection circuit, wherein the short-circuit detection circuit comprises a first resistor R01, a second resistor R02, a first capacitor C01, a first diode D01, a comparator chip U02, a fourth resistor R04 and a second triode Q02. The short-circuit protection circuit of the IGBT of the high-power frequency conversion device is simple in circuit, relatively lower in cost and high in reliability.

Description

Technical field [0001] The invention relates to a high-power frequency conversion device, in particular to an IGBT short-circuit protection circuit of a high-power frequency conversion device. Background technique [0002] At present, single-tube IGBTs or IGBT modules are mostly used as the main components of the inverter circuit in high-power frequency conversion devices (frequency converters, servo controllers). Therefore, IGBT drive and protection have become the key to reliable operation of high-power frequency conversion devices. At present, IGBT drives of high-power frequency conversion devices mostly use circuits without short-circuit protection function or IGBT short-circuit protection module chips. Frequency conversion devices without short-circuit protection function mostly use IGBT driver chips such as HCPL-3120, FOD3120, ACPL-332, etc. The driver chip integrates a photoelectric isolation circuit and a power amplifier circuit, and is directly connected to the gate resi...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing high-power frequency conversion device IGBT short-circuit protection circuit that cannot take into account both protection function and cost, the present invention provides a high-power frequency conversion device IGBT short-circuit protection circuit with simple circuit, low cost and high reliability

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