The Discrete Space Vector Modulation Strategy for the Permanent Magnet Synchronous Machine with Large Inertia

In order to reduce the torque ripple and improve the dynamic performance, a direct torque control strategy with special discrete space vector modulation (DSVM) for the permanent magnet synchronous motor (PMSM) control system with large inertia is proposed in this paper. With this discrete space vector modulation strategy, more voltage vectors will be generated that the electromagnetic torque variation will be controlled and the undesired torque will be restrained. An improvement of the drive performance can be obtained using the DVSM. Numerical simulations have been carried out to validate the proposed method. Keywords-permanent magnet synchronous motor; large inertia; direct torque control; discrete space vector modulation

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