Driving circuit for dynamic variable IGBT switching characteristics and protection method thereof
A technology of switching characteristics and driving circuits, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of unable to meet the control performance and protection requirements of high-power IGBT, single form, etc., and achieve enhanced fault analysis and Handling ability, suppression of overvoltage and overcurrent, and effect of reducing switching loss
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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0032] After research, the switching performance and loss of IGBT are affected by the gate drive resistance, especially in the turn-on and turn-off transient process, the size of the gate drive resistance needs to be adjusted quickly to achieve the purpose of rational distribution of losses, overvoltage and overcurrent; at the same time; In the fault state, the IGBT can be actively protected by adjusting the size of the gate drive resista...
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