A Coupling Simulation of Converter Field Circuit for Active Radial Electromagnetic Bearing Based on Simplorer and Maxwell

Abstract

Under the background of intelligent new manufacturing, rotating machinery is developing towards the direction of high speed, high precision, intelligence and automation. Bearing, as the key component of high-speed precision rotor, has higher and higher requirements. As a high performance electromechanical integrated bearing, active magnetic bearings(AMBS) have a wide application prospect. In this paper, based on Simplorer and Ansoft Maxwell, the converter field-circuit coupling joint simulation of active radial magnetic bearing is carried out, including the structural design of active radial magnetic bearing and the establishment of the finite element model of active radial magnetic bearing in Maxwell. The mathematical model of single-degree-of-freedom of active radial magnetic bearing is established and the PID controller is designed. Power amplifier circuit is established in Simplorer, active radial magnetic bearing control program C module is created, and active radial electromagnetic bearing finite element model created in Maxwell is imported into Simplorer for joint simulation. Finally, the simulation results of magnetic force line, magnetic density, current stiffness and displacement stiffness of active radial magnetic bearing based on PID controller are given. Research shows that applying control strategy based on Simplorer field-circuit coupling joint simulation method combining software and hardware features, the simulation results more close to reality, the whole design of the active magnetic bearing system is verified.