| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an improved ceramic permanent magnet stator for an electric motor. Ž<P>SOLUTION: The electric motor includes a stator and a rotor. The stator has a housing and a single ceramic permanent magnet arranged in the housing. The magnet has a C-shaped cross section. During assembly, the magnet is resiliently deformed to allow the magnet to be inserted into the housing. The inner diameter of the housing is smaller than the outer diameter of the magnet in a relaxed state and once inserted in the housing, the magnet is kept resiliently deformed by the housing. The magnet thus generates a radial force acting on the inner surface of the housing and causes the magnet to be firmly retained in the housing. A slot is formed between opposing circumferential ends of the magnet. The slot extends from one axial end of the magnet to the other axial end. A spacer is pressed into the slot and an interlock structure is arranged between the spacer and the housing to prevent the magnet from moving relative to the housing. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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