Author(s)

Yu Fu, Kunyang Zeng

Corresponding Author

Kunyang Zeng

Abstract

In this paper, a supplementary analysis is made on the lack of research on magnetothermal coupling of McPherson's linear motor actuator. The suspension model is simplified by the second Lagrange equation, the three-degree-of-freedom dynamic equation is established, and the main power curve of the motor is determined by the ceiling damping control algorithm. The motor structure is designed and its rationality is verified by no-load simulation. It is found that the motor thrust fluctuates greatly under load. Genetic algorithm was used to optimize the parameters of slot width and permanent magnet height, and the thrust fluctuation was reduced to 7.1%, reaching 97.3% of the target thrust. Loading three-phase current in the motor winding shows that the thrust of the motor is in good agreement with the ideal main force, which proves the effectiveness of the optimal design. The magnetic thermal coupling simulation shows that the central temperature of the motor is high, and the average temperature rises by about 27°C. This study provides an important reference for the performance analysis of electromagnetic active suspension and the development of cooling system.

Keywords

MacPherson type electromagnetic active suspension; linear motor actuator; magneto-thermal coupling analysis; genetic algorithm; magneto-thermal coupling finite element simulation