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The permanent magnet synchronous machine with an external rotor is the most important device for high performance electrical drive systems in particular for hybrid electric vehicles. With such an application, the machine will operate in a wide speed range and on the other hand with very fast changing loads in both motor and generator operational modes. The paper discusses finite element analyses for...
This paper describes the FEM analysis of positioning systems using segment type surface PMSM. The systems are simulated by using FEM taking into account the motion equation of the motor drive. The transient phenomena of positioning system are strictly analyzed by considering the cogging torque of PMSM. In addition, the effect of the step response of positioning system on field weakening control of...
This paper deals with the sensorless-oriented design of interior permanent magnet (IPM) motor for the general industrial application. The finite element analysis is used to examine the influence of the IPM rotor geometry on the feasibility region for the sensorless rotor position detection. Consequently, the design guideline is established to obtain a suitable rotor geometry which can maximize the...
The cogging force of a permanent-magnet linear motor (PMLM) is a major component of the detent force, but unfortunately makes a ripple in the thrust force and induces undesired vibration and acoustic noise. It also deteriorates the control characteristics, particularly in regard to precise speed and position control. In this paper, we propose a new PMLM having a 9-pole 10-slot structure in order to...
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