Non-continuous pulse width modulation method for odd-phase three-level converter

The invention relates to a non-continuous pulse width modulation method for an odd-phase three-level converter. A voltage and current outputted by an odd-phase three-level converter are collected; four kinds of DPWMI-IV based on a three-phase three-level converter are extended to the odd-phase three-level converter to obtain zones of being clamped to positive or negative buses of all phases; a common mode voltage is injected into the output voltage and a Fourier analysis is carried out on the common mode voltage to meet the odd-numbered frequency multiplication of the odd-numbered phase; and then comparison with a carrier is carried out to generate a specific PWM switching sequence. 本发明涉及种奇数相三电平变流器的非连续脉宽调制方法，首先采集奇数相三电平变流器输出的电压和电流，然后将基于三相三电平变流器的四种非连续调制策略(DPWMI-IV)扩展至奇数相三电平变流器，得到各相被钳位至正或负母线的区间，在此基础上向输出电压注入共模电压，并对共模电压进行傅里叶分析，其满足奇数相的奇数次倍频，最后与载波进行比较，以生成特定的PWM开关序列。