IGBT桥式逆变电源浪涌电压的抑制研究

The IGBT Bridge Inverter Power Surge Voltage Suppression Research

IGBT桥式逆变电源经常处于高速开关状态,即会产生浪涌电压威胁其正常工作,因此对IGBT桥式逆变电源浪涌电压的抑制是逆变电路正常工作的基本保证。本文对桥式逆变电源的浪涌电压产生的原因进行了分析,介绍了浪涌电压的计算,并根据浪涌电压计算公式对抑制浪涌电压的方法进行了分析。在中频加热电路中采用了3种浪涌电压吸收电路,并用示波器进行了观测,验证了其效果。

IGBT bridge inverter power are often in the high-speed switch state, will produce a surge voltage threat to its normal work, so the IGBT bridge inverter power surge voltage suppression is the basic guarantee of the normal work. this article analyzes the causes of the bridge inverter power surge voltage, introduces how the calculation of the surge voltage, and focus on the surge voltage suppression according to the formula of surge voltage. If heating circuit adopts three types of surge voltage absorbing circuit, and observes with an oscilloscope to verify its effects.