US 2022/0385157 A1Published application

Electric rotating machine

AssigneeMitsubishi Electric Corporation

InventorsYuki HIDAKA, Toshiyuki YOSHIZAWA, Naohide MAEDA, Tadashi MURAKAMI, Hiroyuki HIGASHINO

Life of this patent

Estimating the term…

Loading patent…

Abstract

In an electric rotating machine which can improve rotating machine efficiency by suppressing a harmonic component of rotor magnetomotive force and reducing harmonic core loss, a permanent magnet is furnished in some of inter-magnetic pole portions, the inter-magnetic pole portion being formed between a first claw-shaped magnetic pole portion and a second such pole portion; the shapes of first and second chamfered portions provided in the inter-magnetic pole portion where the permanent magnet is inserted, differ from those of first and second chamfered portions provided in an inter-magnetic pole portion having no permanent magnet inserted; or the shapes of a first and second magnetic flux adjusting portions provided in the inter-magnetic pole portion where the permanent magnet is inserted, differ from those of first and second magnetic flux adjusting portions provided in the inter-magnetic pole portion where no permanent magnet is inserted.

Claims5

Dependent claims

An electric rotating machine comprising:

a rotor;
and
a stator configured to be arranged via an air gap with respect to the outer circumference of the rotor;
the rotor being configured to have a rotor winding, and a pole core body which is constituted by combining a first pole with a second pole and wherein the rotor winding is arranged in an internal space formed by the first pole and the second pole;
the first pole being configured to have a plurality of first claw-shaped magnetic pole pieces arranged with a space in the a rotation direction of the rotor;
the second pole being configured to have a plurality of second claw-shaped magnetic pole pieces arranged with a space in the rotation direction of the rotor;
the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces being configured to be furnished with a permanent magnet in some of inter-magnetic poles, the inter-magnetic poles being formed between the first and second claw-shaped magnetic pole pieces;
and
the first pole and the second pole being configured to be combined so that the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces respectively are alternately engaged;
the electric rotating machine including:
first magnetic flux adjusters configured to be provided on at least one side surface in the rotation direction of the first claw-shaped magnetic pole pieces to reduce the distance between the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole piece pieces;
second magnetic flux adjusters configured to be provided on at least one side surface in the rotation direction of the second claw-shaped magnetic pole pieces to reduce the distance between the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces;
a pair of first chamfers configured to be provided on at least one end side in the rotation direction on the stator side surface of the first claw-shaped magnetic pole pieces;
and
a pair of second chamfers configured to be provided on at least one end side in the rotation direction on the stator side surface of the second claw-shaped magnetic pole pieces;
wherein the shapes of the first chamfer and the second chamfer, which are adjacent to the inter-magnetic pole where the permanent magnet is inserted, are configured to be of a same shape;
and
wherein the shapes of the first magnetic flux adjuster and the second magnetic flux adjuster, which are adjacent to the inter-magnetic pole where the permanent magnet is inserted, are configured to be of a same shape.

15 more elements

An electric rotating machine comprising:

a rotor;
and
a stator configured to be arranged via an air gap with respect to the outer circumference of the rotor;
the rotor being configured to have a rotor winding, and a pole core body which is constituted by combining a first pole with a second pole and wherein the rotor winding is arranged in an internal space formed by the first pole and the second pole;
the first pole being configured to have a plurality of first claw-shaped magnetic pole pieces arranged with a space in the a rotation direction of the rotor;
the second pole being configured to have a plurality of second claw-shaped magnetic pole pieces arranged with a space in the rotation direction of the rotor;
the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces being configured to be furnished with a permanent magnet in some of inter-magnetic poles, the inter-magnetic poles being formed between the first and second claw-shaped magnetic pole pieces;
and
the first pole and the second pole being configured to be combined so that the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces respectively are alternately engaged;
the electric rotating machine including:
first magnetic flux adjusters configured to be provided on both side surfaces in the rotation direction of the first claw-shaped magnetic pole pieces to reduce the distance between the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole piece pieces;
second magnetic flux adjusters configured to be provided on both side surfaces in the rotation direction of the second claw-shaped magnetic pole pieces to reduce the distance between the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces;
a pair of first chamfers configured to be provided on both end sides in the rotation direction on the stator side surface of the first claw-shaped magnetic pole pieces;
and
a pair of second chamfers configured to be provided on both end sides in the rotation direction on the stator side surface of the second claw-shaped magnetic pole pieces;
wherein the shapes of the first chamfer and the second chamfer, which are adjacent to the inter-magnetic pole where the permanent magnet is inserted, are configured to be different from shapes of the first chamfer and the second chamfer, which are adjacent to an inter-magnetic pole where the permanent magnet is not inserted.

13 more elements

An electric rotating machine comprising:

a rotor;
and
a stator configured to be arranged via an air gap with respect to the outer circumference of the rotor;
the rotor being configured to have a rotor winding, and a pole core body which is constituted by combining a first pole with a second pole and wherein the rotor winding is arranged in an internal space formed by the first pole and the second pole;
the first pole being configured to have a plurality of first claw-shaped magnetic pole pieces arranged with a space in the a rotation direction of the rotor;
the second pole being configured to have a plurality of second claw-shaped magnetic pole pieces arranged with a space in the rotation direction of the rotor;
the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces being configured to be furnished with a permanent magnet in some of inter-magnetic poles, the inter-magnetic poles being formed between the first and second claw-shaped magnetic pole pieces;
and
the first pole and the second pole being configured to be combined so that the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces respectively are alternately engaged;
the electric rotating machine including:
first magnetic flux adjusters configured to be provided on both side surfaces in the rotation direction of the first claw-shaped magnetic pole pieces to reduce the distance between the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole piece pieces;
second magnetic flux adjusters configured to be provided on both side surfaces in the rotation direction of the second claw-shaped magnetic pole pieces to reduce the distance between the first claw-shaped magnetic pole pieces and the second claw-shaped magnetic pole pieces;
a pair of first chamfers configured to be provided on both end sides in the rotation direction on the stator side surface of the first claw-shaped magnetic pole pieces;
and
a pair of second chamfers configured to be provided on both end sides in the rotation direction on the stator side surface of the second claw-shaped magnetic pole pieces;
wherein the shapes of the first magnetic flux adjuster and the second magnetic flux adjuster, which are adjacent to the inter-magnetic pole where the permanent magnet is inserted, are configured to be different from shapes of the first magnetic flux adjuster and the second magnetic flux adjuster, which are adjacent to the inter-magnetic pole where the permanent magnet is not inserted.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/883,990Filed 9 Aug 2022
Priority: JP 2019-22504013 Dec 2019
Published: 1 Dec 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02K 21/044
With permanent magnets and field winding both rotating: rotor of the claw pole type
H02K 1/243
Rotor cores with salient poles ; Variable reluctance rotors: of the claw-pole type
H02K 1/2766
Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]: having a flux concentration effect
H02K 11/05
Rectifiers associated with stationary parts, e.g. stator cores: rectifiers associated with casings, enclosures or brackets

Family

Application17/087,998Continuation · filed 3 Nov 2020
Application17/883,990Continuation
US 11,532,974 B2Related patent
US 2021/0184519 A1Published application
US 2022/0385157 A1This patent

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