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Cogging torque is a common design issue in Permanent Magnet Synchronous Machines (PMSMs). Altering the magnet shape is one of the solutions in reducing the cogging torque. This paper addresses the variation in the rotor magnet pole arc which would affect the cogging torque of the external rotor permanent magnet synchronous motor (ERPMSM). Analytical calculations to design a three-phase, 12slot/8pole...
This paper presents a comparison among low cost permanent magnet synchronous machine (PMSM) solutions, employing the frame and the stator laminations of an asynchronous machine. The comparison is carried out by means of finite element simulations. This work aims at obtaining machines with reduced cost, competitive in terms of nominal torque, torque ripple and cogging torque. The baseline for comparison...
This paper presents a novel structure of double salient interior permanent magnet machine (DSIPM machine) based on mutually coupled switched reluctance machine (MCSRM). Due to its salient rotor structure, the DSIPM machine can have less magnetic and iron materials as well as higher dynamic response than conventional IPM machines. The comparison of electromagnetic performances in terms of self and...
First of all, a novel axial sectional claw pole machine with PM outer rotor (ASCPM) which is suitable for pump and fan is introduced briefly, and then the structure of ASCPM is presented, too. Secondly, under the conditions of loaded and unloaded respectively, analysis of magnetic filed is made to the motor. With the method of three-dimensional finite element analysis, waveforms of torque and back-EMF...
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...
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