Shu Li, Yongli Lei, Jianhao Kang, Yushuai Ren and Cong Gao
The secondary of the permanent magnet-salient iron composite pole linear synchronous motor (PM-SICPLSM) employs a U-type segmented permanent magnet structure, characterized by high magnetic flux focusing capability, low leakage flux, and high thrust density. As the temperature field distribution significantly impacts the operational reliability of the motor, a comprehensive thermal analysis is conducted. First, the structural operating principle of the PM-SICPLSM is examined, and the implications of temperature rise are discussed. Subsequently, the heat source distribution is identified, and key thermal parameters—including losses, thermal conductivity, and heat dissipation coefficients of the components—are calculated. A finite element model (FEM) of the PM-SICPLSM is then established to compute the heat source density and analyze the transient temperature rise of the motor components. This study provides a valuable reference for the thermal design of this motor topology.
Linear Synchronous Motor; Composite Pole Permanent Magnet; Temperature Field Calculation; Finite Element