Cooling of electrical machines
First Claim
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1. A stator for an air gap electrical machine, the stator comprising:
- a) an outer annular laminated stator core coaxial with a longitudinal axis of the machine, b) a stator winding inside the stator core and comprising a plurality of coils having linear conductor portions, and c) a plurality of supports for the coils, the supports extending alongside the linear conductor portions of the coils, the supports being fabricated from a non-magnetic material, and each support being interposed between, and in contact with, two adjacent ones of the linear conductor portions of the coils, at least some of the supports defining channels for a flow of a coolant therealong, thereby to extract heat from the coils.
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Abstract
A stator for a high power density air gap electrical machine comprises an outer annular laminated iron stator core and a stator winding comprising a plurality of coils having linear conductor portions extending substantially parallel to a longitudinal axis of the machine. Support teeth for the coils are fabricated from a non-magnetic material, with each support being interposed between two adjacent ones of the linear conductor portions of the coils. The supports not only supplement the mechanical strength of the winding but also define channels for the flow of coolant to extract heat from the coils.
43 Citations
25 Claims
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1. A stator for an air gap electrical machine, the stator comprising:
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a) an outer annular laminated stator core coaxial with a longitudinal axis of the machine, b) a stator winding inside the stator core and comprising a plurality of coils having linear conductor portions, and c) a plurality of supports for the coils, the supports extending alongside the linear conductor portions of the coils, the supports being fabricated from a non-magnetic material, and each support being interposed between, and in contact with, two adjacent ones of the linear conductor portions of the coils, at least some of the supports defining channels for a flow of a coolant therealong, thereby to extract heat from the coils. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25)
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23. An electric motor or generator having a stator comprising:
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a) an outer annular laminated stator core coaxial with a longitudinal axis of the motor or generator, b) a stator winding inside the stator core and comprising a plurality of coils having linear conductor portions, and c) a plurality of supports for the coils, the supports extending alongside the linear conductor portions of the coils, the supports being fabricated from a non-magnetic material, and each support being interposed between, and in contact with, two adjacent ones of the linear conductor portions of the coils, at least some of the supports defining channels for a flow of a coolant therealong, thereby to extract heat from the coils.
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24. A method of cooling a stator of an air gap electrical machine, comprising the step of:
- passing a coolant through channels at least partly defined by non-magnetic material supports located between, and in contact with, adjacent linear conductor portions of coils comprising a stator winding of the machine.
Specification