Title :
The application of PWM rectifier used in self-feedback cascade speed control system
Author :
Changxiao, Ma ; Aimeng, Wang
Abstract :
Analyzed the reason that the power factor of self- feedback cascade speed control system is poor. A new cascaded speed-adjusting system scheme based on PWM technique is proposed in this paper. SCR is substituted with IGBT in the system. It can provide capacitive reactive power to compensate inductive reactive power which the conventional cascaded speed- adjusting system produces. So it can improve power factor. PWM rectifier and PWM direct current control strategy are introduced in the paper. At last, simulation result and conclusion are given. It shows that the new system works at unity power factor.
Keywords :
PWM rectifiers; angular velocity control; cascade control; electric current control; electric motors; feedback; insulated gate bipolar transistors; machine control; power factor; reactive power; IGBT; PWM direct current control; PWM rectifier; capacitive reactive power; motor control; power factor; self- feedback cascade speed control system; Feedback; Pulse width modulation; Pulse width modulation inverters; Reactive power; Rectifiers; Rotors; Stator windings; Thyristors; Velocity control; Voltage; Cascade control; PWM; power factor;
Conference_Titel :
Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on
Conference_Location :
Nanjuing
Print_ISBN :
978-7-900714-13-8
Electronic_ISBN :
978-7-900714-13-8
DOI :
10.1109/DRPT.2008.4523788
