Performance analysis of a five phase 10Slot_4Pole PMSM for electric vehicle
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Date
2018-06
Authors
Nur Syahirah Abdul Sani
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Abstract
Among all types of electrical motors, Permanent Magnet Synchronous Motor
(PMSM) is the most reliable and efficient motors in industrial applications. It is widely
used in industries, home application, automotive and aircraft, due to its low
maintenance, high efficiency, good dynamic performance and high torque density. This
project investigates the influence of the various type of winding configuration and
different magnetization patterns in the performance of a five-phase PMSM. Three types
of magnetization patterns such as radial magnetization, parallel magnetization, and
multi-segmented Halbach magnetization are applied to the 10-slot/4-pole PMSM
during open-circuit and on-load conditions. A 2D finite element method (FEM) is
intensively used in this investigation to model and predict the electromagnetic
characteristics and performance of the PMSM. The detailed finite-element analysis
(FEA) results on the cogging torque, phase back-EMF, air gap flux density,
electromagnetic torque, unbalanced magnetic pull and output torque, are analyzed. The
phase back-EMF of the motor is computed further into its harmonic distortions.
Further, the skewing method for minimization of cogging torque of PMSM is proposed.
As a result, the PMSMs with double layer distributed winding with parallel
magnetization gives the best motor performance in terms of high fundamental phase
back-EMF, low total harmonic distortion, low peak cogging torque, low UMP and high
average electromagnetic torque. Due to this, the PMSM has potential to provide the
cost savings for the electric vehicle with a compact winding configuration in multi-
phase motors, which is capable of providing smaller magnet volume with a high-performance motor.