In order to highlight the possibilities of an induction motor drive to be competitive with respect to a permanent-magnet one, the paper analyzes and compares the dynamic performances of both speed-controlled drives. A microprocessor-based closed-loop control scheme is considered. Proper feeding algorithms are implemented either for induction or PM-brushless drives. As well as with classical hysteresis current regulators of VSI, the dynamic behaviour of the drives is analyzed also with reference to specific predictive control techniques. Even if more sophisticated, these digital control algorithms allow a reduction of the ripples in the currents and torque waveforms. Finally, comparative remarks are deduced from a series of numerical results obtained by means of a digital simulation of overall closed-loop drives with regard to some meaningful transient operations.
A Comparison Between Microprocessor Speed Controlled PM Brushless and Induction Motor Drives
MARONGIU, IGNAZIO;
1994-01-01
Abstract
In order to highlight the possibilities of an induction motor drive to be competitive with respect to a permanent-magnet one, the paper analyzes and compares the dynamic performances of both speed-controlled drives. A microprocessor-based closed-loop control scheme is considered. Proper feeding algorithms are implemented either for induction or PM-brushless drives. As well as with classical hysteresis current regulators of VSI, the dynamic behaviour of the drives is analyzed also with reference to specific predictive control techniques. Even if more sophisticated, these digital control algorithms allow a reduction of the ripples in the currents and torque waveforms. Finally, comparative remarks are deduced from a series of numerical results obtained by means of a digital simulation of overall closed-loop drives with regard to some meaningful transient operations.
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