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Calculation of Position-Dependent Inductances of a Permanent Magnet Synchronous Machine With an External Rotor by Using Voltage-Driven Finite Element Analyses

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2 Author(s)
Erich Schmidt ; Inst. of Electr. Drives & Machines, Vienna Univ. of Technol., Vienna ; Andreas Eilenberger

This paper discusses finite element analyses of a skewed permanent magnet synchronous machine (PMSM) with an external rotor regarding the magnetic saliency. Since the machine is fed from a voltage source inverter (VSI), a simulation as close as possible to the regular operational behavior is intended. Therefore, a voltage-driven finite element model with a strong circuit coupling excited with the time-dependent voltages according to the space vectors of the VSI will be applied. This approach directly allows for a comparison of the numerically obtained phase currents with those obtained from measurements. Afterwards, the inductance characteristics depending on the rotor position can be evaluated from the time-dependent phase currents in order to obtain the suitability for a sensorless control algorithm.

Published in:

IEEE Transactions on Magnetics  (Volume:45 ,  Issue: 3 )