Abstract：To solve the problems of low integration level and reliability of magnetic bearing system controllers and power amplifiers based on analog circuits or DSP, a new type of magnetic electric control system was designed based on the field programmable gate array (FPGA). The control system was modeled by MATLAB to simulate the influences of parameters on system performance. According to the ripple and dynamic characteristics of FPGA digital power amplifier, the new system was applied for magnetic suspension ball system to realize ball suspending. The results show that the vibration magnitude of the ball can be controlled at 15 μm. Under the operating conditions,bus voltage of 150 V, switching frequency of 25 kHz, load coil inductance of 40 mH and static current of 2 A, FPGAbased system can realize stable suspension with power amplifier current ripple of 300 mA and cutoff frequency of 350 Hz. This new type digital controller can meet the demands of AMB system.
金超武, 徐龙祥. 基于FPGA的磁悬浮轴承电控系统设计[J]. 江苏大学学报（自然科学版）, 2011, 32(5): 578-582.
JIN Chaowu, XU Longxiang. Electric control system design of magnetic bearings based on FPGA[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2011, 32(5): 578-582.
2011, Vol. 32 
