無整流子電動機の効率最適化速度制御

概要

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A new variable speed control method for the Commutatorless Motor is proposed on the basis of Modern Control Theory, to provide not only a quick response for speed reference but a high efficiency operation. The summarized contents of the proposed method are the following.(1) The optimum ratio of armature current to field current making the efficiency maximum is derived.(2) Ordinarily, as a commutatorles motor has an unstable tendency when it is driven in the manner of a constant commutation margin angle, the air gap flux is necessary to keep constant by sensing the air gap flux. However, the proposed method does not need the flux sensing because of estimating all the state variables with accessible state variables.(3) For reducing the production cost, the technique that constructs the feedback control system using the accessible state variables is employed.(4) As a result from considering thyristor commutating mechanism, a new current controller which protects the motor system from the commutation failure is introduced.Finally, the proposed control method is applied for the numerical commutatorless motor model, and its usefulness is confirmed through the simulation.
社団法人電気学会の論文