Rotor for a dynamoelectric machine

Details Rotor for a dynamoelectric machine Rotor for a dynamoelectric machine

1998-12-22

2000-07-18

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310 58, 310 59, 310 60A, 310 65, 310156, 310269, 310166, 310168, 310261, H02K 900

Patent

active

060911689

ABSTRACT:
Losses in efficiency of operation of a dynamoelectric machine as a result of eddy current losses and poor coolant efficiency and/or disruption of the magnetic circuit in a rotor by coolant passages is avoided in a dynamoelectric machine including a stator (18) in which a rotor (16) is journaled. The rotor includes a stack (16) of thin laminations (17) made of a ferromagnetic material to define a rotor body. The rotor body includes a plurality of equally angularly spaced poles (58) separated by recesses (64). Coolant passages (76) located in the rotor at or just radially inward of the base (72) of each pole (58) and substantially radially outward of the rotational axis (56) of the rotor (14) to maximize cooling efficiency of the poles (58) without disrupting the magnetic circuit in the rotor. Slots (80) are placed in the tips (70) of the poles (58) of selected laminations (17) and extend generally radially inward to reduce eddy current losses.

REFERENCES:
patent: 4395816 (1983-08-01), Pangburn
patent: 4442371 (1984-04-01), Utsunomiya et al.
patent: 4908537 (1990-03-01), Sismour, Jr.
patent: 5369325 (1994-11-01), Nagate et al.
patent: 5666015 (1997-09-01), Uchibori et al.
patent: 5703421 (1997-12-01), Durkin
patent: 5801463 (1998-09-01), Suzuki et al.
patent: 5861700 (1999-01-01), Kim

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