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A novel dead time compensation method for PWM inverter

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2 Author(s)
Zhigan Wu ; Delta Power Electron. Center, Shanghai, China ; Jianping Ying

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.

Published in:

Power Electronics and Drive Systems, 2003. PEDS 2003. The Fifth International Conference on  (Volume:2 )

Date of Conference:

17-20 Nov. 2003