Generalized Optimal Pulsewidth Modulation of Multilevel Inverters for Low-Switching-Frequency Control of Medium-Voltage High-Power Industrial AC Drives
Medium-voltage ac drives;
multilevel inverters;
optimization;
synchronous optimal pulsewidth modulation (PWM) (SOP);
HARMONIC ELIMINATION;
SPACE VECTOR;
PWM;
TOPOLOGIES;
ALGORITHM;
D O I:
10.1109/TIE.2012.2217717
中图分类号:
TP [自动化技术、计算机技术];
学科分类号:
0812 ;
摘要:
A generalized optimal pulsewidth modulation (PWM) technique applicable to multilevel inverters for low-switching-frequency control of medium-voltage high-power industrial ac drives is presented. Proposed synchronous optimal PWM method allows setting the maximum switching frequency to a low value without compromising the harmonic distortion of machine currents. Low switching frequency reduces the switching losses of the power semiconductor devices, resulting in higher inverter power output and efficiency. The proposed optimization results in low harmonic distortion at low switching frequency. Experimental results of a five-level inverter drive using optimal PWM are presented.