US 2017/0250594 A1Published application

Electric motor

AssigneesDaikin Industries, Ltd., Nagoya Institute of Technology

InventorsYoshinari ASANO, Takashi KOSAKA

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Abstract

An electric motor includes a rotor and a stator including a stator core, a plurality of armature windings, a plurality of field windings, and a plurality of bonded magnets. The stator core has a plurality of teeth alternately defining field slots and armature slots along a circumferential direction, and a stator yoke magnetically coupling the plurality of teeth opposite the rotor. Each armature winding is wound around two of the teeth sandwiched between an adjacent pair of the armature slots. Each field winding is wound around two of the teeth sandwiched between an adjacent pair of the field slots. The magnets are individually located in the field slots while opposing the field windings in the radial direction. Each adjacent pair of the magnets along the circumferential direction respectively has an adjacent pair of pole surfaces, with the adjacent pair of pole surfaces having a same polarity.

Claims10

Dependent claims

An electric motor comprising:

a rotor;
and
a stator facing said rotor with an air gap formed therebetween in a radial direction about an axis of rotation, said stator including
a stator core having
a plurality of teeth alternately defining field slots and armature slots along a circumferential direction around said axis of rotation, and
a stator yoke magnetically coupling said plurality of teeth opposite said rotor,
a plurality of armature windings with each armature winding wound around two of said teeth sandwiched between an adjacent pair of said armature slots along said circumferential direction,
a plurality of field windings with each field winding wound around two of said teeth sandwiched between an adjacent pair of said field slots along said circumferential direction, and
a plurality of bonded magnets acting as field magnets individually located in said field slots while opposing said field windings in said radial direction, each adjacent pair of said plurality of bonded magnets along said circumferential direction respectively having an adjacent pair of pole surfaces, with said adjacent pair of pole surfaces having a same polarity.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/500,014Filed 19 Jun 2015
Priority: JP 2014-15454630 Jul 2014
Published: 31 Aug 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02K 19/12
For multi-phase current: characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
H02K 1/16
Stationary parts of the magnetic circuit: stator cores with slots for windings
H02K 1/17
Stationary parts of the magnetic circuit: stator cores with permanent magnets
H02K 21/04
Details: windings on magnets for additional excitation ; Windings and magnets for additional excitation

Family

US 10,348,174 B2Related patent
US 2017/0250594 A1This patent

From the US filing history. Foreign family members aren’t listed.

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