Design of Digital Switching Power Amplifier for Magnetic Suspended Bearing

摘要

Digital power amplifier used to drive magnetic bearings has gradually replaced analog power amplifier due to its advantages such as high hardware integration, excellent control performance, anti-jamming capability, fast response speed, convenient debugging and so on. In this paper, TMS32028335 is selected to be the main controller as well as using two-level current control modulation to design digital amplifier system. Experiments results indicate that the digital amplifier can effectively track coil current.