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A turn wound around each pole of an SPM motor allows the direct axis flux linkage dynamics to be modified while preserving the quadrature axis one. Thus, a rotor dynamic anisotropy is created. Consequently, the motor can be used in a position sensorless control which exploits the anisotropic rotor features by high frequency injected signals. The model of the machine is described in the paper, and...
In a synchronous reluctance motor (including the PM assisted and interior PM configurations), the anisotropy of the rotor causes high contents of flux density harmonics. These harmonics yield flux density fluctuation in the stator, especially in the teeth, and thus additional iron losses. These losses increase with the motor speed and are independent of the main flux, that is, they exist even during...
The aim of this paper is to analyze the behavior of a sensorless control system based on a high-frequency signal injection combined with an inset permanent-magnet (PM) motor. The rotor position of a synchronous PM motor with anisotropic rotor can be detected by the control system which superimposes a high-frequency signal to the fundamental stator voltage. The corresponding high-frequency current...
The aim of this paper is to analyze the behavior of a sensorless control system based on a high-frequency signal injection combined with an inset PM motor. The rotor position of a synchronous permanent magnet (PM) motor with anisotropic rotor can be detected by the control system which superimposes a high-frequency signal to the steady-state stator voltage. The corresponding high-frequency current...
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