The Manufacture of the Experiment Teaching Material on Generator and Motor

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  • 発電機と電動機に関する実験教材の作成
  • ハツデンキ ト デンドウキ ニ カンスル ジッケン キョウザイ ノ サクセイ

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In this paper we describe experimental teaching material primarily using the motor, principle for power generation. Additionally, a generator using geomagnetism is described. The congnitive disharmony (surprise, conflict, lack of coordination) was recognized, and this played a role in further understanding of the experiment. In the preparation of this teaching experiment we emphasized a feeling for the phenomenon and the operating principle. In the case of the motor it was possible to observe that rotation direction and rotatinal state could be changed by changing the magnetic position and polarity by hand: the result was produced experimentally by rearranging parts in the Mabuchi motor. In power generation we worked toward a minimum size. And, the rerationship between force and power generation was understood from the experince of the force in moving right and left. The relationship between rotational speed and electric power generation of the coil was demonstrated by producing the geomagnetic generator experimentally with enameled wires attached to the frame of a bicycle wheel and moving the coil by hand without using the motor.

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