Nonlinearity of PMSM’s Low-Speed Operation Caused by Dead-Time


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PWM technology has been widely used in motor drive systems today. To avoid the short-circuit condition, dead-time must be inserted to the PWM driving pulses. The addition of dead-time increases the harmonic of output voltage, makes the waveform of winding current more badly. The ripple of motor torque and speed is also increased by the addition of dead-time. The influence of dead-time is more remarkable while the motor speed is low, and so, greatly influence the low-speed working ability. This paper analyzes the influence of dead-time for low-speed motor drive in detail. The nonlinear phenomena in the motion of output voltage-vector, which affects the motor’s low-speed performance directly, is also indicate



Advanced Materials Research (Volumes 383-390)

Edited by:

Wu Fan






W. Y. Zhang and J. Z. Shi, "Nonlinearity of PMSM’s Low-Speed Operation Caused by Dead-Time", Advanced Materials Research, Vols. 383-390, pp. 1518-1523, 2012

Online since:

November 2011




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