| 摘要 |
PURPOSE:To prevent generation of eddy current in a yoke and to improve the rotating efficiency of a rotary cylinder by connecting the yoke to a rotating side rotary transformer. CONSTITUTION:The yoke 14 of a motor integrated with the rotating side rotary transformer 8 is used. Ferrite having high magnetic permeability is used for the material of the core of this transformer 8 and since the ferrite having the high magnetic permeability is used for the yoke 14 as well, the integration of the transformer 8 and the yoke 14 is permitted. Generation of the eddy current in the yoke 14 is prohibited by rotation of the yoke 14 in synchronization with the rotor 10 and, therefore, the rotating resistance force on the rotary cylinder is eliminated. A magnetic path A is formed by magnetical coupling between the transformer 8 having a rotating side coil 20 and the stationary side rotary transformer 9 having a stationary side coil 21 at the time of transfer and reception of recording and reproducing signals between the same. A magnetic path B is formed in the motor as well but since both the magnetic paths A, B intersect orthogonally with each other, generation of a magnetical interference is obviated.
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