| 摘要 |
PURPOSE:To enable stable operation to be performed without generating torque ripple on a motor, by a method wherein a dividing section is set on a ring- formed stator core in the diameter direction, and wherein a three-phase winding is set with a single-layer winding so that the dividing section cannot be crossed, and wherein a magnetic unit ring having a loss section on the leading wire of the winding with the phase of little impendance is set. CONSTITUTION:When AC current I is permitted to flow to a leading wire 3, then magnetic flux phi is generated in an iron-ingot-formed ring 4, and ampere turn AT is generated when the space of a loss section 5 is set to be D. When the area of the loss section is set to be A and a reactance is set to be Le, then Le=D/A is shown. In this case, the same effect as that when a reactor is inserted in the leading wire of a stator winding is generated. On the equivalent circuit of reactances 9a, 9b generated on a motor 6 with arranged stator windings and a terminal 7a..., the terminal 8a of a device..., and the iron-ingot- formed ring, impedance from the viewpoint of the terminals is unbalanced, but impedance from the viewpoint of the terminal of the device can be balanced with the size of the ring 4 and the dimension of the loss section. Accordingly, torque ripple is not generated and operation can be performed.
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