| 摘要 |
PROBLEM TO BE SOLVED: To suppress the output drop of a stator core by suppressing the occurrence of magnetic flux leakage at the joints of teeth by securing the dimensions of the thin wall sections of tooth sections by connecting stator blocks to each other with the thin wall sections and constituting the stator core of partial tooth hook sections and attaching sections. SOLUTION: A stator core is composed of a stator 1 formed by connecting tooth sections to each other with thin wall sections 1 so that no gap may be formed among teeth and a rotor 11 carrying permanent magnets which are arranged on the outer periphery of the stator 1 in a ring-like state on its inner periphery. Since the outer periphery of the stator 1 has only one joint 3, the stator 1 can be rotated in a state where a uniform magnetic flux distribution can be obtained at almost all positions and cogging torque is suppressed. The thin wall sections 2 are made extremely thinner than the teeth so that no magnetic flux may flow between adjacent teeth. A connected stator body is formed by putting a plurality of thick magnetic steel sheets upon another and fixing the steel plates to each other by caulking, welding, bonding, etc. Each stator block, in addition, is composed of a tooth section provided with thin wall sections 2 on both sides, a wound section, and a core indicating section.
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