Title :
System Model of Three-Level Switching Power Amplifier for Magnetic Bearing
Author :
Wang, Jun ; Xu, Longxiang
Author_Institution :
Coll. of Mech. & Electr. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
Switching power amplifier for magnetic bearing is a nonlinear system. An accurate system model is presented. According to the operating modes of three-level switching power amplifier, the math model of power amplifier based on the state-space averaging model is deduced. By using this math model, the closed-loop system transfer function can be analyzed. The PI controller parameter can be designed according to the request of system dynamic response. The simulation and experiment of system are made and the results show that the proposed model provides the dynamic characteristics more closely resembling the actual power amplifier circuit behavior. The model has clear physical meaning and is feasible and effective.
Keywords :
PI control; closed loop systems; control system synthesis; dynamic response; magnetic bearings; nonlinear control systems; power amplifiers; state-space methods; time-varying systems; transfer functions; PI controller parameter design; closed-loop system; dynamic response; magnetic bearing; math model; nonlinear system; state-space averaging model; three-level switching power amplifier; transfer function; Bridge circuits; Control systems; Magnetic levitation; Magnetic switching; Mathematical model; Nonlinear systems; Power amplifiers; Power system modeling; Pulse amplifiers; Voltage; magnetic bearing; modeling; nonlinear; power amplifier; three-level;
Conference_Titel :
Measuring Technology and Mechatronics Automation, 2009. ICMTMA '09. International Conference on
Conference_Location :
Zhangjiajie, Hunan
Print_ISBN :
978-0-7695-3583-8
DOI :
10.1109/ICMTMA.2009.467
