Publisher : The Korean Institute of Power Electronics
DOI : 10.6113/JPE.2016.16.1.388
Title & Authors
Voltage Source Inverter Drive Using Error-compensated Pulse Width Modulation Chen, Keng-Yuan; Hu, Jwu-Sheng; Lin, Jau-Nan;
An error-compensated pulse width modulator (ECPWM) is proposed to improve the baseband harmonic performance and the switching loss of voltage source inverters (VSIs). Selecting between harmonic distortion and switching loss is a design tradeoff in the conventional space vector pulse width modulation. In this work, an accumulated difference in produced and desired phase voltages is considered to adjust the reference signal. This mechanism can compensate for the voltage error in the previous carrier period. With error compensation every half-carrier period, the proposed ECPWM allows one-half reduction in carrier frequency without scarifying baseband harmonic distortion. The proposed modulator is applied to a three-phase VSI with R-L load and a motor-speed-control system for experiments. The measured efficiency and operating temperature of switches confirm the effectiveness of the proposed scheme.
Digital signal;Motor drive;Pulse-width modulation (PWM);Space-vector PWM;Voltage-source inverter;
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