Title :
Current control in overmodulation range for space vector modulation based vector controlled induction motor drives
Author :
Khambadkone, Ashwin M. ; Holtz, J.
Author_Institution :
Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
Overmodulation enhances the power utilization of the installed capacity of a voltage source inverter. A space vector strategy is used for constant switching frequency inverters. In order to achieve the overmodulation a modified reference signal with nonuniform angular velocity is generated using a preprocessor. Such a reference wave produces low frequency harmonics in currents. The presence of current harmonics restricts the bandwidth of the fundamental component current controller in the overmodulation range. On the other hand a high bandwidth current controller is mandatory for vector control. A compensating current control is presented to allow for high bandwidth current control in synchronous coordinates
Keywords :
PWM invertors; electric current control; feedback; induction motor drives; machine vector control; compensating current control; constant switching frequency inverters; current control; current controller; feedback PWM; high bandwidth current control; high bandwidth current controller; low frequency current harmonics; modified reference signal; nonuniform angular velocity; overmodulation range; power utilization; preprocessor; space vector modulation; space vector strategy; synchronous coordinates; vector control; vector controlled induction motor drives; voltage source inverter; Bandwidth; Current control; Frequency; Harmonic distortion; Machine vector control; Power harmonic filters; Pulse width modulation inverters; Space vector pulse width modulation; Torque control; Voltage;
Conference_Titel :
Industrial Electronics Society, 2000. IECON 2000. 26th Annual Confjerence of the IEEE
Conference_Location :
Nagoya
Print_ISBN :
0-7803-6456-2
DOI :
10.1109/IECON.2000.972315
