Motor

Patent metadata

Field	Value
Publication number	US-9806582-B2
Application number	US-201615012634-A
Country	US
Kind code	B2
Filing date	Feb 1, 2016
Priority date	Nov 21, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A motor includes: an end bell mounted on an opening of a cylindrical rotor housing for housing a rotor and is provided with a power-feeding path to the rotor; and a choke coil connected in the middle of the power-feeding path. The choke coil overlaps at least a part of the rotor housing as viewed from outside the rotor housing in a radial direction and as viewed in a direction perpendicular to an axial direction, and is arranged such that a longitudinal direction thereof extends along a direction parallel to a rotating shaft of the motor.

First claim

The invention claimed is:

1. A motor comprising:
an end bell mounted on an opening of a cylindrical rotor housing for housing a rotor and is provided with a power-feeding path to the rotor;
a noise prevention element connected in the middle of the power-feeding path;
a first circuit substrate used for a rotation detector for detecting rotation of the rotor; and
a second circuit substrate separate from the first circuit substrate and used for the noise prevention element, wherein
the noise prevention element overlaps at least a part of the rotor housing as viewed from outside the rotor housing in a radial direction and as viewed in a direction perpendicular to an axial direction, and is arranged such that a longitudinal direction thereof extends along a direction parallel to a rotating shaft of the motor,
the first circuit substrate is provided inside the rotor housing in the radial direction, and
the second circuit substrate is provided outside the rotor housing in the radial direction.

2. The motor according to claim 1 , wherein
the end bell comprises:
a lid conforming to a shape of an opening of the rotor housing; and
a connector provided at a position projecting radially from an outer edge of the lid and connected to a power-feeding terminal fed with an electric current from an external power supply, wherein
the noise prevention element is provided between the lid and the connector.

3. The motor according to claim 1 , wherein
the rotor housing is a magnetic body.

4. The motor according to claim 1 , wherein
the noise prevention element is a choke coil.

Assignees

• Mabuchi Motor Co

Inventors

• Yoshida Atsushi

Classifications

• H02K5/24 Primary

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• H02K11/02 Primary

  for suppression of electromagnetic interference · CPC title

• H02K5/04

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title