Electric motor, and electric device having the motor
AssigneePanasonic Corporation
InventorsHirofumi Mizukami, Akihiko Watanabe
Life of this patent
Estimating the term…
Abstract
Provided is an electric motor that has a stator including a stator iron core having a stator winding, a rotor including a rotary member and a shaft, a bearing for supporting the shaft, and a bracket for fixing the bearing. Further included is an impedance adjusting member for adjusting at least one impedance of the impedance between the stator winding and the inner ring of the bearing, and the impedance between the stator winding and the outer ring of the bearing. The impedance adjusting member is a matching member for matching the individual impedances. The matching member is a capacitor interposed between the stator iron core and the bracket.
Claims18
An electric motor comprising:
- a stator including a stator iron core having a stator winding,
- a rotor including a rotary member holding a plurality of permanent magnets in a peripheral direction opposite to the stator and a shaft tightening the rotary member so as to penetrate through the center of the rotary member,
- a bearing for supporting the shaft, and
- a bracket for fixing the bearing, and further comprising:
- an impedance adjusting member, wherein the impedance adjusting member is a matching member for matching a) the impedance between the stator iron core and an inner ring of the bearing, with b) the impedance between the stator iron core and an outer ring of the bearing.
The electric motor comprising,
- a stator including a stator iron core having a stator winding,
- a rotor including a rotary member holding a plurality of permanent magnets in a peripheral direction opposite to the stator and a shaft tightening the rotary member so as to penetrate through the center of the rotary member,
- a bearing for supporting the shaft, and
- a bracket for fixing the bearing, and further comprising:
- an impedance adjusting member, wherein the impedance adjusting member is a matching member for matching a) the impedance between the stator iron core and an inner ring of the bearing, with b) the impedance between the stator iron core and an outer ring of the bearing,
- wherein the matching member is a member having an impedance component interposed between the outer circumference of the rotary member and the shaft.
Dependencies are inferred from the claim text.