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发明公开
CN105186904A CoolMosfet中点钳位I型三电平拓扑电路及逆变器 有权 转让

CoolMosfet中点钳位I型三电平拓扑电路及逆变器
摘要：
本发明提供了一种CoolMosfet中点钳位I型三电平拓扑电路，包括CoolMosfet Snpc1、CoolMosfet Snpc2、CoolMosfet S2、CoolMosfet S3、IGBT S1、IGBT S4以及二极管D1和二极管D2；同时提供了采用上述拓扑电路的逆变器。本发明的拓扑回路零电平导通经过两条并联支路，且CoolMosfet沟道电阻极低，逆变电路导通损耗将大大降低，有效降低二极管钳位三电平零电平导通损耗；由于防直通电感的存在，PWM信号不需要加入死区；没有钳位二极管的反向恢复损耗，进一步降低了电路导通损耗。
摘要（英）：

The invention provides a CoolMosfet neutral point-clamped I-type tri-level topology circuit comprising a CoolMosfet Snpc1, a CoolMosfet Snpc2, a CoolMosfet S2, a CoolMosfet S3, an IGBT S1, an IGBT S4, a diode D1, and a diode D2. Meanwhile, an inverter adopting the topology circuit is provided. According to the topology circuit, zero-level conduction is carried out through two parallel branches, and the channel resistance of CoolMosfet is extremely low, so that the conduction loss of the inverter circuit is reduced significantly, and the diode-clamped tri-level zero-level conduction loss is reduced effectively. Because of the existence of anti-direct-connection inductance, there is no need to add PWM signals to the dead zone. There is no reverse recovery loss of the clamping diodes, and the circuit conduction loss is further reduced.

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