A high voltage and high power igbt drive circuit

Abstract

The invention discloses a high-voltage and high-power IGBT driving circuit. The high-voltage and high-power IGBT driving circuit comprises a driving power supply circuit module, a PWM signal transceiving module, a high-speed double-channel comparator module, a driving current amplification module, a feedback circuit detection module and a clamping circuit module; the driving power supply circuit module supplies required power supply to each module; the PWM signal transceiving module and the high-speed double-channel comparator module are in signal connection with the driving current amplification module; an IGBT is driven by signals generated by the driving current amplification module; and the feedback circuit detection module is connected to the high-speed double-channel comparator module, and used for over-current and short-circuit detection. By means of the driving circuit disclosed by the invention, the switching time can be shortened; the switching loss can be reduced; and thus,the IGBT works in a relatively ideal switching state.

Description

technical field [0001] The invention relates to the technical field of power electronics, and specifically refers to a high-voltage high-power IGBT drive circuit. Background technique [0002] At present, the application of IGBT driver technology in the field of small and medium power at home and abroad is relatively mature, mainly using analog control to realize the drive, and the function is relatively simple; IGBT combines the advantages of MOSFET and GTR, with high input impedance, fast switching speed, and good thermal stability. , On-state voltage drop, high withstand voltage, large current and other characteristics, in recent years, it has been widely used in various fields. Using a set of driving circuits with good performance can shorten the switching time, reduce switching losses, and make the IGBT work in an ideal switching state. At the same time, it is of great significance to the operating efficiency, reliability and safety of the product. The IGBT is a voltag...

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Problems solved by technology

[0003] In the related art, software method is used to limit the pulse width of the PWM control signal input to the IGBT tube, but there is a deficiency that the pulse width limit may be missed due to the program running away or crashing; There are many electronic components between the poles, and the PWM control signal is in the middle of transmission, and other pulses may be loaded on the G pole to damage the IGBT tube; its three drives up to 3300V, 1500A high-voltage high-power IGBT work, isolation of power supply and control signals , insulation has high requirements

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