Title:
電磁障害特性が低減された交直両用電動機
Document Type and Number:
Japanese Patent JP4657464
Kind Code:
B2
Abstract:
A universal motor has a stator, a rotor, brushes, and a filter circuit on a printed circuit board (PCB). The rotor has a shaft, a commutator mounted on the shaft, and a rotor core mounted on the shaft adjacent to the commutator. The rotor core is electrically connected to the commutator, and rotates within the stator. The brushes deliver electrical power to the commutator, and they elastically contact the commutator. The filter circuit reduces the emission of electromagnetic radiation from the universal motor, and is electrically connected to the brushes. The PCB is mounted over the brushes. When electrical arcing occurs between the commutator and the brushes, the PCB acts as a shield to absorb a portion of the radiation emitted by the arcing so as to reduce the EMI characteristics of the universal motor.
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Inventors:
Riau Bun-Rio
Application Number:
JP2001029519A
Publication Date:
March 23, 2011
Filing Date:
February 06, 2001
Export Citation:
Assignee:
Transpacific Plasma, Limited Liability Company
International Classes:
H02K5/14; H02K11/00; H02K11/02; H02K13/00; H02K23/66
Domestic Patent References:
| JP62095485U | ||||
| JP54093727U | ||||
| JP61227655A | ||||
| JP4025458U | ||||
| JP2022066U |
Attorney, Agent or Firm:
Shoichi Okuyama
Arihara Koichi
Matsushima Tetsuo
Arihara Koichi
Matsushima Tetsuo