US 8,710,786 B1Granted

High performance actuator motor

AssigneeThe Boeing Company

InventorsLeila Parsa, Jeffrey M. Roach, Kamiar J. Karimi, Shengyi Liu, Suman Dwari

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Abstract

An actuator motor described herein has fast dynamic response capability, high torque density, high efficiency, and improved thermal and mechanical stability at high speed while minimizing weight. According to one aspect of the disclosure provided herein, an actuator motor has a rotor shaft with an array of permanent magnets attached according to a Halbach array configuration. A stator includes windings that induce a torque on the rotor shaft when rotating magnetic fields interact with the optimized magnetic flux distributions of the magnets of the Halbach array. According to various embodiments, the rotor shaft is hollow, reducing weight and rotational inertia, while improving ambient cooling characteristics of the motor.

Claims22

Dependent claims

An actuator motor, comprising:

a rotor comprising a rotor shaft and a plurality of contiguous magnets attached to a circumference of the rotor shaft and configured according to an optimized array that produces a plurality of rotor magnetic fields having augmented flux densities exterior to the rotor and diminished flux densities within an interior of the rotor;
and
a stator comprising a stator core aperture sized for receiving the rotor, the stator comprising a plurality of stator windings configured to create one or more stator magnetic fields that when introduced to the plurality of rotor magnetic fields, induces a torque on the rotor shaft,
wherein the plurality of stator windings each comprise a plurality of parallel strands of conductors wrapped around a stator tooth such that a packing density of parallel strands increases along a radial axis from an innermost edge of the stator tooth to an outermost edge of the stator tooth.

1 more element

An actuator motor, comprising:

a first rotor comprising a rotor shaft and a plurality of contiguous magnets attached to a circumference of the rotor shaft and configured according to an optimized array that produces a first plurality of rotor magnetic fields having augmented flux densities exterior to the first rotor and diminished flux densities within an interior of the first rotor;
a first stator comprising a first stator core aperture sized for receiving the first rotor, the stator comprising a first plurality of stator windings configured to create one or more first stator magnetic fields that when introduced to the first plurality of rotor magnetic fields, induces a torque on the rotor shaft;
a second rotor adjacent to and spaced apart from the first rotor, the second rotor configured to create a second plurality of rotor magnetic fields;
and
a second stator comprising a second stator core aperture sized for receiving the second rotor, the second stator configured to create one or more second stator magnetic fields that when introduced to the second plurality of rotor magnetic fields, increases the torque induced on the rotor shaft.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/898,068Filed 20 May 2013 · continuation
Priority: 19 Nov 2010
Granted: 29 Apr 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H02K 29/03
Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices: with a magnetic circuit specially…
H02K 1/2783
Surface mounted magnets; Inset magnets: with magnets arranged in Halbach arrays
H02K 2213/03
Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00: machines characterised by numerical values,…
H02K
Dynamo-electric machines