Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1976-09-08
1978-05-02
Budd, Mark O.
Electrical generator or motor structure
Dynamoelectric
Rotary
H02K 518
Patent
active
040877086
ABSTRACT:
The invention is concerned with a motor for driving a centrifugal pump. The motor comprises a cylinder of circumferentially spaced axially disposed stator teeth; a stack of laminations forming a magnetic return path between the ends of the stator teeth at one end of the cylinder; a rotor in the form of a spherical segment which together with the other ends of the stator teeth defines a part spherical air gap at the other end of the cylinder; and a motor casing formed of a heat and electrically conducting non-magnetic material which radially encloses the stator teeth. The motor further comprises segments formed of a heat and electrically conducting non-magnetic material which are interleaved with the stator teeth and connected in a heat conducting manner to the casing and secured thereto against axial movement away from the rotor; the ends of the segments adjacent the rotor also define said part-spherical air gap with said rotor.
At least one plane surface may be provided on the inside of the casing for supporting and making heat conducting contact with at least one of a set of axially spaced coil windings of the motor. At least some of the segments may support and make heat conducting contact with at least one of the set of coil windings and the casing and segments may be an integral structure.
REFERENCES:
patent: 2735027 (1956-02-01), Formhals et al.
patent: 3155856 (1964-11-01), Macha et al.
patent: 3158767 (1964-11-01), Schoning
patent: 3508092 (1970-04-01), Hallidy
patent: 3814963 (1974-06-01), Laing
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