摘要
电动力鱼雷动力系统设计的关键环节之一就是利用功率器件组成逆变桥进行逆变电路的设计,而功率器件在开通、关断瞬间会承受较大的电流变化率、电压变化率以及电压电流尖峰,这些工作参数如果超出器件的安全工作区,将会导致器件损坏,因此需要设置缓冲电路。首先以绝缘栅双极型晶体管(IGBT)为例分析了功率器件的开关工作过程,比较了不同结构缓冲电路的应用领域及其优缺点,并进行了对比分析、理论推导和仿真试验,仿真结果表明,电阻电容二极管(RCD)放电阻止型缓冲电路对关断浪涌电压抑制能力强、开关损耗低,可以作为大功率、高频电力电子系统设计的优选方案。
One of the key links in power system design of an electric power torpedo is the design of inverter circuit by using power semiconductor devices to form inverter bridge. This device will be subject to sharp variations of current and voltage as well as current and voltage spikes at its ‘turning on＇ or ‘turning off＇ moment. If these parameters beyond the safe operating area of the device, damage would occur, so it is necessary to design a snubber circuit. This paper analyzes the turning on or turning off process of an insulated gate bipolar transistor（IGBT）, compares different applications of snubber circuits with different structures, and discusses the advantages and disadvantages of the snubber circuits. Comparative analysis and theoretical derivation are performed for different inverter bridge snubber circuits, and simulation is conducted. Simulation result shows that the resistance capacitance diode（RCD）-type snubber circuit has the ability of strong suppression to turning-off surge voltage, and has low switching loss. It is hence suggested that the RCD-type snubber circuit be selected in design of high power high frequency power electronic system.
出处
《鱼雷技术》
2016年第1期53-59,共7页
Torpedo Technology
关键词
电动力鱼雷
功率器件
逆变桥
电阻电容二极管型缓冲电路
electric power torpedo
power semiconductor
inverter bridge
resistance capacitance diode（RCD）-type snubber circuit
