This paper proposes a linearization technique for the 3 level NPC type inverter, which increases the linear control range of inverter up to the G-step inverter. The overmodulation range is divided into two modes depending on the modulation index(MI), ...
This paper proposes a linearization technique for the 3 level NPC type inverter, which increases the linear control range of inverter up to the G-step inverter. The overmodulation range is divided into two modes depending on the modulation index(MI), In mode I, the reference angles are derived from the Fourier series expansion of the reference voltage corresponds to the MI. In mode Ⅱ, the holding angles are also derived in the same way. Therefore, it is possible to obtain the linear control and the maximized utilization of PWM inverter output voltage.