Bu Wenshao

Induction compensation control of bearingless induction motor

Analysis and contrast between air-gap flux orientation and rotor flux orientation of bearingless induction motor are be given firstly, at the same time, the flux orientation control strategy and induction compensatation method of magnetic suspension system are analyzed. Then, according to the operation characteristics of bearingless induction motor, the combined control strategy is selected, i.e., rotor flux orientation strategy will be adopted for four-pole torque system and air-gap flux orientation and induction compensation control strategy will be adopted for two-pole magnetic suspension system, and the simulation and experiment of decouple control system of three-phase bearingless induction motor have been made. The simulation and experiment results have proved the validation of the united control strategy.

Hardware implement of numerical control system for bearingless induction motor

To realized the numerical control of three-phase bearingless induction motor, the unitary configuration of numerical control experimental system of three-phase bearingless induction motor has been designed firstly, then based on TMS320LF2407A numerical control CMOS chip of motor, the hardware control system configuration has been designed, and aiming at DSP operation and controller, high-speed photoelectricity seclusion and drive circuit, measuring and adjusting circuits for current and radial displacement, keyboard and display numerical control circuit, etc…, have been presented. The suspension control experiment results have verified the feasibility and practicability of the designed system.