Title :
Novel multilevel inverter carrier-based PWM method
Author :
Tolbert, Leon M. ; Habetler, Thomas G.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
Abstract :
The advent of the transformerless multilevel inverter topology has brought forth various pulsewidth 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 multilevel 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 for a motor drive
Keywords :
DC-AC power convertors; PWM invertors; switching circuits; 10 kW; PWM VSI; PWM strategies; active device switching; carrier-based PWM method; diode-clamped inverter; motor drive; switch utilization; transformerless multilevel inverter topology; voltage-source inverter; Diodes; Frequency; Pulse inverters; Pulse transformers; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Space vector pulse width modulation; Switches; Voltage control;
Journal_Title :
Industry Applications, IEEE Transactions on
