| 摘要 |
<p>A magnetic wedge (13) is fitted into the almost middle part of an opening part (14a) of a stator slot of a motor in such a way that the wedge is in contact with the inner surface of the slot. The magnetic wedge has a non-magnetic insulating sheet material (11) and a magnetic material layer (12) which is coated on at least one side of the non-magnetic insulating sheet material and has a specific resistance of 10-200 νΦ.cm. The magnetic material layer comprises an amorphous magnetic alloy thin film, Fe base magnetic alloy thin film having fine crystal grains, a crystalline magnetic alloy thin film, or a crystalline or amorphous magnetic alloy thin film formed by a thin film technique. The efficiency of the motor can be improved much effectively by allowing the wedge to function as a magnetic wedge having a magnetic material layer of a specific resistance of 10-200 νΦ.cm. Also, since the structure of the magnetic wedge can be simple, the wedge can be made easily and the reliability is improved.</p> |
