Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof
An internal permanent magnet machine includes a rotor assembly having a shaft comprising a plurality of protrusions extending radially outward from a main shaft body and being formed circumferentially about the main shaft body and along an axial length of the main shaft body. A plurality of stacks of laminations are arranged circumferentially about the shaft to receive the plurality of protrusions therein, with each stack of laminations including a plurality of lamination groups arranged axially along a length of the shaft and with permanent magnets being disposed between the stacks of laminations. Each of the laminations includes a shaft protrusion cut formed therein to receive a respective shaft protrusion and, for each of the stacks of laminations, the shaft protrusion cuts formed in the laminations of a respective lamination group are angularly offset from the shaft protrusion cuts formed in the laminations in an adjacent lamination group.
- Research Organization:
- General Electric Co., Schenectady, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0005573
- Assignee:
- General Electric Company, Schenectady, NY, US
- Patent Number(s):
- 9,287,742
- Application Number:
- 13/958,693
- OSTI ID:
- 1241539
- Resource Relation:
- Patent File Date: 2013 Aug 05
- Country of Publication:
- United States
- Language:
- English
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