By providing the wide gap portion 5 22 on {HEAD ~ part} of {TAIL ~ the outer periphery} of the rotor core 5, a magnetic flux distribution that is point symmetrical with respect to the motor shaft 6 can be obtained, as will be described later with reference to FIG 2A through 2L 
of
By providing the wide gap portion 5 22 on { HEAD ~ part } of { TAIL ~ the outer periphery } of the rotor core 5 , a magnetic flux distribution that is point symmetrical with respect to the motor shaft 6 can be obtained , as will be described later with reference to FIG 2A through 2L
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