ブラシレスDCモータの省エネルギー高効率運転法

概要

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This paper proposes a maximum efficiency control algorithm of brushless DC motors for energy saving. This control method shows that motor losses are reduced considerably by actively controlling the d-axis component of the armature current at any speed and power levels. The optimum d-axis current is supplied by a controller which solves the maximum efficiency control algorithm using motor parameters. The performance characteristics are examined in detail by the computer simulations. The efficiency characteristics are affected by the machine parameters which depend on the rotor configurations and permanent magnets arrangement. This paper also investigates the influence of the machine parameters on the efficiency characteristics. To realize this control method simply, an approximation of the maximum efficiency control algorithm is also proposed. Experimental results are presented to verify the improvement of the efficiency.