FPGA Implementation of a Three-Level Power Amplifier for Magnetic Bearings

摘要：

Three-level pulse width modulation (PWM) scheme is recommended for switching power amplifiers used in digitally controlled active magnetic bearings (AMB) because it allows the amplifier to work at a low switching frequency with relatively low current harmonics.In one four-axis AMB there are usually more than ten switching devices to be controlled Therefore FPGA is a good platform for the implementation of three-level PWM. A three-level PWM scheme used on hbridge power amplifiers for AMBs is presented. The FPGA solution for that three-level scheme is given in detail. The setup and results of the test experiment with a digital power amplifier board featured a XC3S1000 FPGA are presented. The results show that the four-channel current control task together with the corresponding modulation task can be carried out by one FPGA at a low cost of resources.

关键词： FPGA power amplifier active magnetic bearings (AMB) three-level PWM.

作者: Li Zhang Kun Liu Xiaofei Chen

作者单位: Department of Astronautics and Material Engineering,National University of Defense Technology Changsha 410073,Peoples Republic of China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 455-460

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）