This paper presents a thorough comparison of Direct Torque Controlled Space Vector Modulated (DTC-SVM) method for a three-phase four-pole Induction Motor and its equal Line-Start Permanent Magnet Synchronous Motor (LSPMSM), which is amended from an actual induction motor. For this reason, both nominal voltage and voltage sag conditions are tested for line-fed and voltage source inverter-fed of both motors, and a comparison between induction motor and LSPMSM behavior shows that synchronization problems of LSPMSM during line-fed conditions are obviated by DTC-SVM method. In addition, a superior transient and steady-state performance of the LSPMSM drive is observed rather than an induction motor, especially for voltage sag conditions.
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