US 6,611,073 B2Granted

Magnetically levitated motor

AssigneeSankyo Seiki Mfg. Co., Ltd.

InventorsHideki Kanebako, Yohji Okada, Keisuke Abe

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Abstract

A rotor includes four magnetic poles provided in a rotational direction at intervals of 90 degrees. A stator includes a winding group for rotation and a winding group for levitation. Each of the winding groups has concentrated windings spaced at intervals of 30 degrees in a rotational direction to provide induction conductive winding sections at twelve locations. Each two of the induction conductive winding sections spaced at an interval of 90 degrees among the twelve induction conductive winding sections are connected to form one winding set such that six winding sets are formed in total in each of the winding groups. Current for rotation and current for levitation are conducted through the six winding sets in the windings for rotation and levitation to perform rotation and levitation controls of the rotor.

Claims21

Dependent claims

A magnetically levitated motor comprising:

at least one stator having a winding group for rotation and a winding group for levitation, each of the winding group for rotation and the winding group for levitation having concentrated windings spaced at intervals of 30 degrees in a rotational direction to provide induction conductive winding sections at twelve locations;
and
at least one rotor having a rotor magnet magnetized to have four magnetic poles arranged adjacent to one another in a rotational direction at intervals of 90 degrees, the stator and the rotor being confronted to each other while the rotor is levitated in a direction orthogonal to an axis of the rotor and rotationally driven by magnetic force,
wherein each two of the induction conductive winding sections spaced at an interval of 90 degrees among the twelve induction conductive winding sections are functionally connected to form a winding set such that six winding sets are formed in total in each of the winding group for rotation and the winding group for levitation.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 10/060,089Filed 29 Jan 2002
Priority: JP 2001-03892015 Feb 2001
Published: US 2002/0153790 A124 Oct 2002
Granted: 26 Aug 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F16C 32/0493
For rotary movement: integrated in an electrodynamic machine, e.g. self-bearing motor
F16C 32/0468
Details of the magnetic circuit: of moving parts of the magnetic circuit, e.g. of the rotor
H02K 7/09
Structural association with bearings: with magnetic bearings
F16C 2380/26
Electrical apparatus: dynamo-electric machines or combinations therewith, e.g. electro-motors and generators