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| A Novel SVPWM Compensation Strategy Based on Regulating Dead Time On-Line |
| He Zhengyi1, Ji Xuewu1, Qu Wenlong2 |
| 1. State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China 2. State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing 100084 China |
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Abstract This paper presents a novel dead-time compensation method for improving the phase current waveform of permanent magnet synchronous motor. The traditional dead-time compensation methods for space vector PWM (SVPWM) are based on the assumption that the dead-time in three inverter legs are fixed, which require accurate current direction information so as to eliminate dead-time effect correctly. In this paper, a new method which independently regulates the dead-time of three inverter legs and the value of dead time is adjusted on-line by the value of corresponding phase current is proposed. With the proposed method, the dead-time disturbance voltage vector rotates synchronously with current vector and no longer depends on current direction. Furthermore, the dead-time disturbance voltage vector in d-q coordinate can be calculated from #em/em#d and #em/em#q without detecting current direction. The experimental results validate that the proposed algorithm can minimize the phase current distortion.
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Received: 18 October 2007
Published: 14 February 2014
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2009, Vol. 24 
