Title :
A PWM Based Switching Power Amplifier for Active Magnetic Bearings
Author :
Changsheng, Zhu ; Zhiwei, Mao
Author_Institution :
Dept. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
A two-level PWM based switching power amplifier for active magnetic bearings with current-loop, which can be used in either voltage-controlled mode or current-controlled mode, was proposed, designed and debugged in this paper. The characteristics of the switching power amplifier with the maximum output current 8 A, such as the static input-output characteristic, frequency response characteristics and current harmonic distortion, were measured. The power amplifier was successfully used to suspend a rotor system. It is shown the proposed two-level PWM switching power amplifier can meet the requirements of the amplifiers of industrial active magnetic bearings
Keywords :
electric current control; frequency response; harmonic distortion; magnetic bearings; power amplifiers; pulse width modulation; rotors; switching circuits; voltage control; PWM switching power amplifier; current-controlled mode; frequency response characteristics; harmonic distortion; industrial active magnetic bearings; rotor system; static input-output characteristics; voltage-controlled mode; Current measurement; Distortion measurement; Frequency response; Harmonic distortion; Magnetic levitation; Magnetic switching; Power amplifiers; Power measurement; Pulse width modulation; Voltage; PWM; active magnetic bearing; switching power amplifier;
Conference_Titel :
Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on
Conference_Location :
Nanjing
Print_ISBN :
7-5062-7407-8
DOI :
10.1109/ICEMS.2005.202812
