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On-line dead-time compensation method using disturbance observer

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3 Author(s)
Hyun-Soo Kim ; R&D Center, POSCON Corp., Seoul, South Korea ; Hyung-Tae Moon ; Myung-Joong Youn

A new on-line dead-time compensation method for a permanent magnet (PM) synchronous motor drive is proposed. Using a simple disturbance observer without any additional circuit and off-line experimental measurement, disturbance voltages in the rotor reference dq frame caused by the dead time and nonideal switching characteristics of power devices are estimated in an on-line manner and fed to voltage references in order to compensate the dead-time effects. The proposed method is applied to a PM synchronous motor drive system and implemented by using software of a digital signal processor (DSP) TMS320C31. Simulations and experiments are carried out for this system and the results well demonstrate the effectiveness of the proposed method.

Published in:

Power Electronics, IEEE Transactions on  (Volume:18 ,  Issue: 6 )

Date of Publication:

Nov. 2003

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