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An Investigation into Torque Accuracy for a 48V IPMSM under usage of Sensorless Control

Torque accuracy of open loop control methods for interior permanent magnet synchronous machines (IPMSM) is one of the most important aspects on which the performance of such a control system is assessed. Due to the fact that in field oriented control the rotor position is used to completed the park transformation, the accuracy of the rotor position used in this transformation, in relation to the actual position of the rotor has a significant effect on the performance of the whole control system. This makes this investigation especially relevant for the use of sensorless control for such a control system.