Motor and electric apparatus equipped with same

Patent metadata

Field	Value
Publication number	US-9059615-B2
Application number	US-201313866813-A
Country	US
Kind code	B2
Filing date	Apr 19, 2013
Priority date	Jul 11, 2012
Publication date	Jun 16, 2015
Grant date	Jun 16, 2015

Abstract

A motor of the invention has a rotary body of a rotor, and the rotary body includes an outer core constituting an outer portion of the rotary body, an inner core constituting an inner portion connected to a shaft, and a dielectric layer disposed between the outer core and the inner core. The outer core has a protruding portion that protrudes inward from an inner surface thereof, and the inner core has a protruding portion that protrudes outward from an outer surface thereof, wherein the outer core and the inner core are so disposed that an end face of the protruding portion of the outer core and an end face of the protruding portion of the inner core confront partially with respect to each other.

First claim

The invention claimed is:

1. A motor comprising:
a stator including a stator core wound with a winding;
a rotor including a rotary body retaining a permanent magnet in a circumferential direction confronting the stator, and a shaft connected to the rotary body in a position penetrating through the center of the rotary body;
a bearing rotatably supporting the shaft; and
a bracket,
wherein the rotary body includes an outer core constituting an outer portion of the rotary body, an inner core constituting an inner portion connected to the shaft, and a dielectric layer disposed between the outer core and the inner core,
the outer core has at least one protruding portion that protrudes inward from an inner surface thereof,
the inner core has at least one protruding portion that protrudes outward from an outer surface thereof, and
the outer core and the inner core are so disposed that an end face of the protruding portion of the outer core and an end face of the protruding portion of the inner core confront partially each other.

2. The motor of claim 1 , wherein the outer core and the inner core are so disposed that a circumferential center of the protruding portion of the inner core is shifted in a circumferential direction by a predetermined angle with respect to a circumferential center of the protruding portion of the outer core.

3. The motor of claim 1 , wherein a height of the inner core is smaller than a height of the outer core.

4. The motor of claim 2 , wherein a height of the inner core is smaller than a height of the outer core.

5. An electric apparatus equipped with the motor defined in claim 1 .

6. An electric apparatus equipped with the motor defined in claim 2 .

7. An electric apparatus equipped with the motor defined in claim 3 .

8. An electric apparatus equipped with the motor defined in claim 4 .

Assignees

• Panasonic Corp
• Panasonic Ip Man Co Ltd

Inventors

• Kowa Takeshi
• Kawasaki Hiroaki
• Watanabe Akihiko
• Maetani Tatsuo
• Isomura Yoshinori

Classifications

• H02K1/04

  characterised by the material used for insulating the magnetic circuit or parts thereof · CPC title

• H02K5/1732

  radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence) · CPC title

• H02K1/30 Primary

  using intermediate parts, e.g. spiders · CPC title

• H02K5/16 Primary

  Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields (magnetic bearings H02K7/09) · CPC title

• H02K11/0089

  Electricity · mapped topic