A method is presented by which the holding torque and the maximum starting torque can be predicted. The pulse rate vs. torque characteristics in ranges of middle- and high-speed operation are calculated taking into account the speed electromotive force and the rise of the current, and the results are compared with test data. It is seen that the measured torque is higher than the predicted value in the high speed range. Effects of the current waveform on the pull-out torque are investigated. The rotor speed oscillation characteristics in the neighborhood of the maximum slewing pulse rate are studied. It is clarified that the frequency of this oscillation decreases as the pulse rate increases, and that the frequency of the current variation coincides with that of the rotor speed oscillation.
J-STAGEがリニューアルされました！https://www.jstage.jst.go.jp/browse/-char/ja/
