System and method for heating ferrite magnet motors for low temperatures

Reddy, Patel Bhageerath; El-Refaie, Ayman Mohamed Fawzi; Huh, Kum-Kang

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Title: System and method for heating ferrite magnet motors for low temperatures

Abstract

A system and method for heating ferrite permanent magnets in an electrical machine is disclosed. The permanent magnet machine includes a stator assembly and a rotor assembly, with a plurality of ferrite permanent magnets disposed within the stator assembly or the rotor assembly to generate a magnetic field that interacts with a stator magnetic field to produce a torque. A controller of the electrical machine is programmed to cause a primary field current to be applied to the stator windings to generate the stator magnetic field, so as to cause the rotor assembly to rotate relative to the stator assembly. The controller is further programmed to cause a secondary current to be applied to the stator windings to selectively generate a secondary magnetic field, the secondary magnetic field inducing eddy currents in at least one of the stator assembly and the rotor assembly to heat the ferrite permanent magnets.

Inventors:: Reddy, Patel Bhageerath; El-Refaie, Ayman Mohamed Fawzi; Huh, Kum-Kang

Issue Date:: Tue May 08 00:00:00 EDT 2018

Research Org.:: General Electric Co., Schenectady, NY (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1439589

Patent Number(s):: 9966897

Application Number:: 15/588,044

Assignee:: General Electric Company (Schenectady, NY)

Patent Classifications (CPCs):: H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES

H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS

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H - ELECTRICITY H02 - GENERATION H02K - DYNAMO-ELECTRIC MACHINES
H02K1/17 - Stator cores with permanent magnets
H02K1/246 - {Variable reluctance rotors}
H02K1/2766 - {having a flux concentration effect}
H02K1/30 - using intermediate parts, e.g. spiders
H02K11/25 - Devices for sensing temperature, or actuated thereby
H02K15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
H02K15/125 - {Heating or drying of machines in operational state, e.g. standstill heating}
H02K21/12 - with stationary armatures and rotating magnets
H02K21/26 - with rotating armatures and stationary magnets
H02K21/44 - with armature windings wound upon the magnets

H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS
H02P29/60 - Controlling or determining the temperature of the motor or of the drive

Show less

DOE Contract Number:: EE0005573

Resource Type:: Patent

Resource Relation:: Patent File Date: 2017 May 05

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING

Citation Formats


                    Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, and Huh, Kum-Kang. System and method for heating ferrite magnet motors for low temperatures.  United States: N. p., 2018. 
        Web.

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                    Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, & Huh, Kum-Kang. System and method for heating ferrite magnet motors for low temperatures.  United States.

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                    Reddy, Patel Bhageerath, El-Refaie, Ayman Mohamed Fawzi, and Huh, Kum-Kang. Tue .  
        "System and method for heating ferrite magnet motors for low temperatures".  United States.  https://www.osti.gov/servlets/purl/1439589.

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@article{osti_1439589,

  title        = {System and method for heating ferrite magnet motors for low temperatures},

  author       = {Reddy, Patel Bhageerath and El-Refaie, Ayman Mohamed Fawzi and Huh, Kum-Kang},

  abstractNote = {A system and method for heating ferrite permanent magnets in an electrical machine is disclosed. The permanent magnet machine includes a stator assembly and a rotor assembly, with a plurality of ferrite permanent magnets disposed within the stator assembly or the rotor assembly to generate a magnetic field that interacts with a stator magnetic field to produce a torque. A controller of the electrical machine is programmed to cause a primary field current to be applied to the stator windings to generate the stator magnetic field, so as to cause the rotor assembly to rotate relative to the stator assembly. The controller is further programmed to cause a secondary current to be applied to the stator windings to selectively generate a secondary magnetic field, the secondary magnetic field inducing eddy currents in at least one of the stator assembly and the rotor assembly to heat the ferrite permanent magnets.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue May 08 00:00:00 EDT 2018},

  month        = {Tue May 08 00:00:00 EDT 2018}

}

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