Abstract
The aim of this paper is to propose a new integrated interior permanent magnet synchronous motor (IPMSM) drive to improve performances for the whole speed range. Conventionally, in the field-weakening operation of the IPMSM (or PMSM) drives, there are three common drawbacks, which are high copper loss, serious current chattering phenomena, and poor current transient performance. The proposed control strategy can achieve two different levels of variable dc-link voltage and near zero transient voltage dynamics simultaneously. Hence, it can achieve a new high-speed operation mode that is different from that of the conventional field-weakening control strategies. The merits of the proposed motor drive include achieving the maximum torque per ampere control in the full speed range and having more versatile selection for DC link voltage.
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