Comparative Research on Electromagnetic-Thermal Coupling Characteristics of Flux Switching PM Linear Motors

In this paper, the electromagnetic-thermal coupling characteristics of the primary integrated and primary separated flux switching PM linear motor are compared. The thermal analysis models of primary integrated and primary separated flux switching PM linear motor are established. The steady temperature and transient temperature rise of two kinds of motors are calculated in rated operation respectively. Based on the calculation of temperature rise, the influence of motor temperature rise on the permanent magnet in different primary structures is analyzed. In addition, the influence on the electromagnetic properties of motors are investigated. The no-load EMF and load thrust of different primary structures at different temperature are compared. It is concluded that the electromagnetic performance of the primary separated flux switching PM linear motor is less affected by the temperature rise of the motor, and it is more suitable for the long-term operation of the working field.