Title :
A current-control mode three-level PWM switching power amplifier for active magnetic bearings
Author :
Changsheng, Zhu ; Yang, Cao ; Dan, Zhou ; Liang, Cheng
Author_Institution :
Dept. of Electr. Eng., Zhejiang Univ., Hangzhou
Abstract :
A current-control mode three-level pulse width modulation (PWM) switching power amplifier for active magnetic bearings was proposed in this paper. The basic structure of this power amplifier is introduced. The basic characteristics of this power amplifier are simulated in PSPICE, measured and compared with that of a standard two-level PWM switching power amplifier. It is shown that the current ripple of the three-level PWM switching power amplifier is independent with the DC supply voltage and much smaller than the two-level PWM switching power amplifier, which can improve the dynamic characteristic of power amplifier by boosting the DC supply voltage without enlarging current ripple.
Keywords :
electric current control; magnetic bearings; power amplifiers; DC supply voltage; PSPICE; active magnetic bearings; current-control mode; pulse width modulation; three-level PWM switching power amplifier; Magnetic levitation; Magnetic modulators; Magnetic switching; Power amplifiers; Power measurement; Pulse amplifiers; Pulse width modulation; SPICE; Space vector pulse width modulation; Voltage;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
