Title :
Stability improvement of CSI-fed multi-motor drives
Author :
Ma, Jack Daming ; Wu, Bin ; Rizzo, Steve
Author_Institution :
Dept. of Electr. & Comput. Eng., Ryerson Polytech. Inst., Toronto, Ont., Canada
Abstract :
The stability of the CSI-fed multi-motor drive is investigated in this paper. The V/f control scheme is considered for use in the proposed drive not only because it does not require motor parameters but also it is easy to implement. However, the V/f controlled CSI drive has an inherent stability problem caused by LC resonances. The system stability is investigated by means of eigenvalue analysis. The investigation reveals that the drive stability can be substantially improved by introducing an active damping control. The effect of the damping control on the drive stability is analyzed. The stability of the drive powering two induction motors under various loading conditions is also studied. The theoretical analysis is verified by experiments on a DSP controlled CSI multi-motor drive
Keywords :
DC-AC power convertors; PWM power convertors; control system analysis; control system synthesis; damping; eigenvalues and eigenfunctions; frequency control; induction motor drives; invertors; machine control; machine testing; machine theory; stability; thyristor convertors; voltage control; CSI-fed multi-motor drives; DSP control; LC resonance; V/f control scheme; active damping control; control design; control performance; control simulation; current source invertor; eigenvalue analysis; induction motors; loading conditions; stability improvement; AC motors; Capacitors; Damping; Drives; Induction motors; Magnetic resonance; Power system stability; Pulse width modulation inverters; Resonant frequency; Stability analysis;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.882075
