Patent ID: 11949315
Assignee: WOLONG ELECTRIC GROUP CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A motor comprising:
a stator that includes a stator core and a stator winding wound around the stator core;
a rotor that includes a rotating body and a shaft, the rotating body holding magnets in a circumferential direction of the rotor and facing the stator, or holding magnets in a spoke shape from a center, the shaft fastened to the rotating body and penetrating a center of the rotating body;
a first bearing and a second bearing that each support the rotating body;
a first metal bracket and a second metal bracket that respectively fix the first bearing and the second bearing; and
a capacitive member that is located between the first metal bracket and the second metal bracket, and has a capacitance Csb1sb2 that is configured in such a manner that a combined capacitance A1 is increased to cause a first ratio to be approximated or matched to a second ratio,
where the first shaft voltage Vsh1 and the second shaft voltage Vsh2 are respectively a voltage of the first bearing and a voltage of the second bearing,
where the combined capacitance A1 includes the capacitance Csb1sb2, a capacitance Csb1 located between the stator core and the first metal bracket, and a capacitance Csb2 located between the stator core and the second metal bracket,
where the first ratio is a ratio of the combined capacitance A1 to a capacitance Cnb1 located between a portion having a zero reference potential of a drive circuit applying a voltage to the stator winding and the first metal bracket,, where the second ratio is a ratio of a combined capacitance B1 to a capacitance Cns located between the portion having the zero reference potential and the shaft, and
where the combined capacitance B1 includes a capacitance Ci located between the stator winding and the stator core, a capacitance Cg located between the stator core and the magnets, a capacitance Csm located between the stator winding and the magnets, and a capacitance Cm being a capacitance of the magnets.