| 摘要 |
The driving circuit for supplying current to coils for generating a rotating magnetic field is divided into a switch side circuit and a driver side circuit so as to pass current through only one of the coils. Each of the switch side circuit and the driver side circuit is constituted by a number of component circuits. The driving circuit comprises (N+M) component circuits for driving (NxM) coil circuits, where N represents the number of the component circuits of the switch side circuit and M that of the component circuits of the driver side circuit whereby additional coils may be driven without multiplying the number of driving circuits.
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