Novel Multilevel Inverter Carrier-Based PWM Method
نویسندگان
چکیده
The advent of the transformerless multilevel inverter topology has brought forth various pulse width modulation (PWM) schemes as a means to control the switching of the active devices in each of the multiple voltage levels in the inverter. An analysis of how existing multilevel carrier-based PWM affects switch utilization for the different levels of a diode-clamped inverter is conducted. Two novel carrier-based multi-level PWM schemes are presented which help to optimize or balance the switch utilization in multilevel inverters. A 10 kW prototype six-level diode-clamped inverter has been built and controlled with the novel PWM strategies proposed in this paper to act as a voltage source inverter. Index Terms Carrier-based pulsewidth modulation, diodeclamped inverter, multilevel converter, multilevel inverter, multilevel pulse width modulation.
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