Title :
A novel dead time compensation method for PWM inverter
Author :
Wu, Zhigan ; Ying, Jianping
Author_Institution :
Delta Power Electron. Center, Shanghai, China
Abstract :
Dead time that is utilized to prevent the short circuit of inverter bridges usually results in serious output current distortion in PWM VSI and consequently torque ripple on motor shaft. In this paper, the effect of dead time is investigated. A low cost current direction detecting circuit with high precision is presented. Based on that, a novel compensation method to suppress this output distortion is proposed. Finally the effectiveness of the method is verified by experiments together with other two types of marketing product of inverter in comparison. The feasibility for inverter output frequency dynamic transition is also proved.
Keywords :
PWM invertors; compensation; detector circuits; PWM inverter; VSI bridges; current direction detecting circuit; dead time compensation method; frequency dynamic transition; motor shaft; torque ripple; AC motors; Bridge circuits; Costs; Driver circuits; Frequency; Nonlinear distortion; Pulse width modulation; Pulse width modulation inverters; Torque; Voltage;
Conference_Titel :
Power Electronics and Drive Systems, 2003. PEDS 2003. The Fifth International Conference on
Print_ISBN :
0-7803-7885-7
DOI :
10.1109/PEDS.2003.1283158
