A measurement method of the exact variations of the self and mutual inductances of a buried permanent magnet synchronous motor and its application to the reduction of torque ripples.
1998 5TH INTERNATIONAL WORKSHOP ON ADVANCED MOTION CONTROL - PROCEEDINGS: AMC '98 - COIMBRA
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1998年
关键词:
D O I:
10.1109/AMC.1998.743535
中图分类号:
TP [自动化技术、计算机技术];
学科分类号:
0812 ;
摘要:
In this paper, a new measurement method of the variations of the self and mutual inductances of a buried permanent magnet synchronous motor is proposed This method allows to calculate the inductances variations in the Concordia's reference frame without recurring to the Park's assumption of sinusoidal pattern. Afterwards, these parameters are used to develop a new nonlinear torque control strategy. This controller simultaneously achieves accurate torque control (in fact, the torque ripples are reduced to zero) and copper losses minimization. To reach this goal, we apply input-output linearization techniques where the inputs are the stator voltages and the outputs are the provided torque and a judiciously chosen output linked to the copper losses in such a way that, when forced to zero, it lends to the maximum machine efficiency. The performance of the measurement method and of the control strategy is demonstrated by simulations. The results are compared to the ones obtained with a controller based on Park's assumptions.