Title: A novel approach of dead time compensation method for ac servo driver

Authors: Haitao Qin, Anwen Shen, Wenyu Wang, Qiao Zhang, Xin Luo

Addresses: Department of Control Science and Engineering, HuaZhong University of Science and Technology, Room 306, Building South One, Wuhan, Hubei, China. ' Department of Control Science and Engineering, HuaZhong University of Science and Technology, Room 306, Building South One, Wuhan, Hubei, China. ' Department of Control Science and Engineering, HuaZhong University of Science and Technology, Room 306, Building South One, Wuhan, Hubei, China. ' Department of Control Science and Engineering, HuaZhong University of Science and Technology, Room 306, Building South One, Wuhan, Hubei, China. ' Department of Control Science and Engineering, HuaZhong University of Science and Technology, Room 306, Building South One, Wuhan, Hubei, China

Abstract: Dead-time which is applied to the voltage source inverter (VSI) distorts the inverter output voltage waveforms and deteriorates the control performance of an ac-servo driver by producing torque ripples. A dead-time compensation method is proposed in this paper. The method is based on a feed-forward approach that produces compensating signal by using the phase of the current vector in the two-phase stationary (α/β) frame. It provides excellent inverter output voltage distortion correction for both fundamental and harmonic components. The method is only software intensive and easy to be realised without additional hardware. Simulation and experimental results obtained from the compensation method are also described.

Keywords: AC-servo drivers; dead time compensation; permanent magnet synchronous motors; PMSM; vector control; voltage source inverters; VSI; torque ripples; simulation.

DOI: 10.1504/IJMIC.2011.040496

International Journal of Modelling, Identification and Control, 2011 Vol.13 No.1/2, pp.117 - 125

Published online: 31 May 2011 *

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