誘導形トランジスタ,モータについて

概要

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We have known that a small capacity d. c machine is convenient for the portable use, but, have been troubled with a failure of commutation. Recently, it is promoted a study of a commutator less motor to avoids the above fault, then we have studied a transistor motor of an induction type. Now, we decide to call it as a transistor motor that consists of the transistor inverter and the induction motor which is drived by its inverter. From the result of several experiments, we have learned that if any spike-killer circuit is not connected to the inverter, a very peak voltage that is called a spike voltage will occur at the instant of switching off of the transistor, so that the spike-killer circuit has to be connected to its terminal, and then the frequency of the inverter depends upon the applied voltage and the maximum flux density of the core, it decreases slowly according to the load torque increases, and by the use of some spike-killer circuit can achieve the most desirable characteristics on which the maximum efficiency reachs up to 20%, and the load torpue gets up 800 g-cm.
山梨大学の論文