Design and Performance Analysis of Permanent Magnet Synchronous Motor for Electric Vehicles Application

Abstract

In electrical vehicle applications, power density plays a significant role in improving machine performance. The main objective of this paper is to design and analyze the performance of in-wheel outer rotor permanent magnet synchronous motor (PMSM) used in electric vehicles based on a previously designed model. The key challenge is to achieve the best machine performance regarding the highest torque density and lowest torque ripple. This work also aims at reducing the machine cost by using permanent magnet (PM) material, which has less energy density than the PM used in the previously designed model. An optimization procedure is carried out to improve the generated torque, keeping the same aspects of size and volume of the selected machine. On the other hand, the other specifications of the machine are taken into consideration and are maintained within the acceptable level. According to their major impact on the machine’s performance, the most important parameters of machine designing is selected during the optimization procedure. This proposed machine is implemented and tested using the finite element software package “MagNet 7.4.1” with Visual Basic 16.0 programming language and MATLAB 9.5 Simulink for post-processing.

Design and Performance Analysis of an Outer-Rotor PMaSynRM

“…6. The variation of the two torque components and the total output torque of a typical PMaSynRM, depending on the current phase angle is presented in Figure 3 Torque ripple is also an important performance parameter for electric motors and can be expressed as the equation below [20].…”

Eccentricity Effect on Radial Forces of Bearingless BLDC Motor: Study and Analysis

“…This number of symmetric slot/pole configurations makes the machine work under balanced flux density distribution and minimize radial force effect. As it can be seen, the three-phase winding connection sequence is (𝐴-𝐴′-𝐵-𝐵′-𝐶-𝐶′) where 𝐴′, 𝐵′, 𝐶′ is the return phases corresponding to phases 𝐴, 𝐵, 𝐶, respectively, as shown in Figure 5(a) [13,14]. According to the number of symmetries, the 12/8 machine can be divided into four symmetric parts.…”

Study the dynamic performance of PM machines for different rotor topologies

“…Compared with other types of electrical machines, permanent magnet synchronous machines (PMSM) have high torque density, high power density, small losses, simple structure for the rotor, and then high efficiency and reliability which gain its great popularity and a contender for various industrial application and domestic appliance [1]− [4]. Accordingly, the use of high-energy magnets as a source of excitation such as rare earth plays an important effect on the dynamic performance of the machines.…”