| Active magnetic bearing(AMB) is a kind of novel high-performance bearing,in which rotor can be suspended stably by controllable magnetic force and realize contact-free property between rotor and stator. Due to its advantages of no friction,no lubrication,lo ngevity,low energy consumption,low vibration and noise and so on,it is much beter than traditional bearing and has vast and promising applications in following fields: aerospace, energy, transportation, super-high speed and high precisionm anufacturing,etc.The control system is an important part of AMB system and influences its performance. This paper makes some research and experiment of hardware design and control algorithm for AMB control system. The main works are as follows:First, on the basis of the Analysis of the three-level amplifier characteristics,in accordance with the needs of AMB control system, This paper is designed to use the Xilinx Xc2s200 FPGA as a platform for the numeric of magnetic bearing amplifier drive system, Improve the three-level power amplifier of the current response rate, Reduce the current ripple, At the same time makes magnetic bearings with high precision and high rigidity.Second, Digital PID control procedures used, Amp improve the current response rate, Parallel to the number of communications sent the DSP receive control signals, And real-time collection will be current in the coil to the data sent to the control of DSP chips, Improve the system of control accuracy and stability.Third, Fever to study the effects of magnetic bearings, We designed a multi-point temperature without interference automatic detection system, Thermistor in the use of magnetic levitation Spindle several key points on the internal temperature detection, Real time for the operation of the control system to provide reference data.This research has a contribution to the application of Magnetic bearing on the grinder .
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