Electrical machine cooling

An electrical machine 300 comprising a stator, the stator comprising: one or more stator windings comprising: a central winding region, and an end winding region 225, and one or more chambers 250 in which the end winding region of the stator windings are located, where the chamber comprises a ferrof...

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Bibliographic Details
Main Authors Chiaki Umemura, Rajesh Pranay Deodhar, Juntao Shi
Format Patent
LanguageEnglish
Published 17.04.2024
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:An electrical machine 300 comprising a stator, the stator comprising: one or more stator windings comprising: a central winding region, and an end winding region 225, and one or more chambers 250 in which the end winding region of the stator windings are located, where the chamber comprises a ferrofluid. The machine comprises a rotor 230, a rotor shaft, and one or more magnets 210 mounted to the shaft; where at least a portion of the magnets is arranged to overlap, in an axial direction of the machine, at least a portion of the one or more chambers in which the ferrofluid is located. The magnets may be arranged in distinct groups based on their length and magnetic coercive forces. The use of a reduction gear may rotate the second magnets at an angular velocity that is lower than an angular velocity of first magnets. End plates 270 may form axial ends of the chambers to form a thermally conductive pathway to transfer heat away from the ferrofluid. The machine may be arranged so that the stator is arranged further from the axis of rotation or that the rotor is arranged further from the axis of rotation. Similar features may be applied to a linear electrical machine arrangement.
Bibliography:Application Number: GB20220003811