基于门极电压调制的大功率IGBT过压尖峰抑制

High-power IGBT Overvoltage Spike Suppression Based on Gate Voltage Modulation

随着现代电力电子技术的不断发展,功率半导体器件的开关速度和功率等级都在进一步提高,其开关电压尖峰成为功率器件在发展过程中必须解决的问题。此处提出一种脉宽调制(PWM)脉冲预调制技术,在驱动电路中增加数字控制模块,根据负载电流的变化及时改变PWM策略,有效抑制关断电压尖峰,使驱动电路更具有通用性。通过实验验证该方法的可行性和实用性。

With the continuous development of modern power electronic technology,the switching speed and power level of power semiconductor devices are further improved and its switching voltage spikes have become a problem that must be solved in the development process of power devices.A pulse width modulation(PWM)pulse pre-modulation technology is proposed which adds a digital control module to the drive circuit and changes the PWM strategy in time according to the change of load current which effectively suppresses the turn-off voltage spike and makes the drive circuit more versatile.The feasibility and practicability of this method are verified through experiments.