Design Of Electronic Control System For Active Magnetic Suspension Permanent Magnet Synchronous Motor

The motor plays an important role in the mechanical movement and dragging.The realization of the high efficiency of the motor is the direction of the efforts of all countries in the world.High-speed motors have an irreplaceable advantage over conventional motors in terms of motor speed and power density.Magnetic bearings and the high speed motors they support are the hotspots of current research.The existing magnetic bearing is connected to the rotor of the motor through a coupling,and the external rotor is suspended by the control system,thereby reducing the friction coefficient.This has led to the development of a magnetic bearing control system for direct suspension of the rotor of the motor with outstanding value and broad market space.In this paper,an active magnetic suspension permanent magnet synchronous motor electronic control system is designed for the rotor of permanent magnet synchronous motor.Using DSP+FPGA dual-core controller,effectively solves the problem that DSP single-core processor can’t complete multi-channel parallel processing.Designed the hardware circuit of the electronic control system.A fast and reliable magnetic bearing control method is proposed to achieve stable suspension control of the rotor.The productization and performance test of the active magnetic suspension permanent magnet synchronous motor controller was completed.This paper has mainly completed the following aspects:(1)The working principle of the active magnetic suspension bearing is studied.The control requirements of the rotor suspension of the permanent magnet synchronous motor are defined,and the components of the control system are clarified.Considering the performance requirements of the system and the design difficulties,the R&D plan was established and the overall structure of the magnetic bearing electronic control system was designed.(2)The hardware circuit design of each functional module of the magnetic bearing electronic control system is completed.The control circuit with structural innovation,switching power amplifier circuit,power supply circuit,and especially the eddy current displacement sensor circuit capable of accurately measuring displacement are designed,and completed circuit PCB design(3)Based on the magnetic suspension bearing system to establish a mathematical model,relying on PID control and designing an incomplete differential PID control method for the system.The software programming of the algorithm and the temperature detection module is completed,and the purpose of reliably and stably controlling the rotor suspension is achieved.The program of the magnetic suspension bearing electronic control system was simulated and analyzed,and loaded into the controller to run and achieved good application results.(4)The appearance mold of the magnetic bearing electronic control system was designed.The full performance test was carried out for the hardware circuit of the system design,and the reliability of each module of the controller was verified.The joint test of magnetic suspension electronic control system and permanent magnet synchronous motor is completed for each stage of motor speed.It is proved that the magnetic bearing controller designed in this paper can be practically applied to the rotor suspension control of permanent magnet synchronous motor.