Cooling System For An Electrical Machine
AssigneeABB AB
InventorsJohan Osterberg, Stefan Palmgren, Robert Larsson
Life of this patent
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Abstract
A cooling system for an electrical machine includes a substantially closed housing, a first heat exchanger arranged inside of the housing, a second heat exchanger arranged outside of the housing, a conduit assembly for transferring a heat exchange medium in a closed circuit between the first and the second heat exchangers, a first air circulating means configured to circulate air inside of the housing over the first heat exchanger, and a second air circulating means configured to circulate air outside of the housing over the second heat exchanger, wherein the conduit assembly includes a pump for actively circulating the heat exchange medium between the first and the second heat exchangers.
Claims12
A cooling system for an electrical machine, the cooling system comprising:
- a substantially closed housing,
- a first heat exchanger arranged inside of the housing,
- a second heat exchanger arranged outside of the housing,
- a conduit assembly for transferring a heat exchange medium in a closed circuit between the first and the second heat exchangers,
- a first air circulating means configured to circulate air inside of the housing over the first heat exchanger, and
- a second air circulating means configured to circulate air outside of the housing over the second heat exchanger,
- characterized in that the conduit assembly comprises a pump for actively circulating the heat exchange medium between the first and the second heat exchangers.
An electrical machine comprising a stator, a rotor, a shaft and a cooling system, the cooling system comprising:
- a substantially closed housing,
- a first heat exchanger arranged inside of the housing,
- a second heat exchanger arranged outside of the housing,
- a conduit assembly for transferring a heat exchange medium in a closed circuit between the first and the second heat exchangers,
- a first air circulating means configured to circulate air inside of the housing over the first heat exchanger, and
- a second air circulating means configured to circulate air outside of the housing over the second heat exchanger,
- characterized in that the conduit assembly comprises a pump for actively circulating the heat exchange medium between the first and the second heat exchangers.
A method for cooling an electrical machine comprising a stator and a rotor, the method comprising the steps of:
- providing the electrical machine with a substantially closed housing;
- providing a first heat exchanger inside of the housing;
- providing a second heat exchanger outside of the housing;
- providing a conduit assembly for transferring a heat exchange medium in a closed circuit between the first and the second heat exchangers;
- circulating air inside of the housing over the first heat exchanger;
- and
- circulating air outside of the housing over the second heat exchanger;
- characterized by actively circulating the heat exchange medium between the first and the second heat exchangers.
Dependencies are inferred from the claim text.