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This paper proposes a simple three-level direct torque control scheme incorporating a sparse three-level neutral point clamped inverter for the control of a low voltage interior permanent magnet synchronous machine. The main objective of the proposed scheme is to improve the torque and flux responses of the direct torque controlled interior permanent magnet machine with the minimum amount of semiconductor...
The performance of direct torque control (DTC) interior permanent magnet (IPM) machines at low speed is poor due to a few reasons, namely limited accuracy of stator voltage acquisition and the presence of offset and drift components in the acquired signals. Due to factors such as forward voltage drop across devices in the three phase inverter and dead-time of switching devices, the voltage across...
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