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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 discusses the rotating analysis for 18-slot/16-pole Permanent Magnet Synchronous Motor (PMSM) using Finite Element Method. The PMSM is applied for Light Electric Vehicle (LEV) which has about 200 kg net mass and maximum velocity of 30 km/h. The motor is located in the wheels of the LEV. The motor is built using three main components i.e. laminated steel iron, coils, and Neodymium-Iron-Boron...
One of the most frequently used fault detection methods for induction motor is the current signature analysis. This technique depends upon locating by finite element method and analysis of specific harmonic components in the line current produced by unique rotating flux components caused by faults such as broken rotor bars. The motor current signature analysis method can detect these problems at an...
This paper describes finite element modeling and analysis of 3-phase brushless DC motor for direct-drive application with low speed and high torque capability. The motor is intended to be used as traction drive in an electric bicycle. The proposed motor has external rotor configuration with surface mounted NdFeB magnets. Motor transmission is gearless so that it will increase motor efficiency and...
This paper presents design, modeling and prototyping of three-phase permanent-magnet brushless machines having a fractional slot to pole ratio. In particular, permanent magnet brushless machines which exhibits slot number and pole number differ by either plusmn2 or plusmn1 will be considered. Such small difference in slot and pole numbers will potentially improve motor characteristics and subsequently...
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