A New Approach of Continuous Waveform Modulation with Low Switch Frequency on Three-level Circuit

Hao Zhang, Tianmu Chen, Yinhuai Que


Switching loss of power electronic devices has been an non-ignorable factor because that affects the performance of power electronic devices. Trying to reduce the switching loss has become the key of to improve the switching frequency and switching power of the frequency converter. This paper presents a method of waveform continuous transformation of power electronic devices, which can reduce the switching time of power electronic devices in a three level inverter circuit. This method ensured that the input voltage amplitude range can be reduced at any point and the number of switching time of power electronic devices can be reduced by 1/3.



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