Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-03-28
1996-06-25
LaBalle, Clayton E.
Electrical generator or motor structure
Dynamoelectric
Rotary
310181, H02K 2112, H02K 2114, H02K 2104
Patent
active
055303072
ABSTRACT:
A brushless, permanent magnet dynamo-electric machine (50) has a stator assembly (52) and a rotor assembly (RA). The rotor assembly includes a rotor (R) mounted on a rotor shaft (RS). The stator assembly has a plurality of inwardly salient poles (54) and the rotor has a plurality of outwardly salient poles (RP). The rotor is comprised of a plurality of stacked rotor laminations (L) defining the rotor poles, and there is an air gap (G1) between the rotor and stator poles. An improvement (56) of the present invention controls the available flux coupled between the rotor and stator assemblies. A coil (70) is supported on a magnetic mounting structure (66) which is connected to an endwall (W) of the motor housing and fits the coil over the rotor shaft. D.C. current is supplied to the coil. A plurality of magnets (82a, 82b) extend the length of the lamination stack and the magnets are positioned adjacent an outer face of one pole for each set of rotor poles. The magnets are mounted on support structure (72) that extends about the coil. The magnets magnetically attach to the outer surface of the rotor poles to suspend the structure about the shaft. An air gap (G2) extends between the coil and shaft. The magnets rotate in synchronism with the rotor. The current supplied to the coil controls the flux coupled to the rotor, and the mounting structures for the coil and magnets partially define a diversion flux path for the resultant flux.
REFERENCES:
patent: 2796542 (1957-06-01), Bekey et al.
patent: 3411027 (1968-11-01), Rosenberg
patent: 4654551 (1987-03-01), Farr
patent: 4757224 (1988-07-01), McGee et al.
patent: 4766362 (1988-08-01), Sadvary
patent: 4916346 (1990-04-01), Kliman
patent: 5177391 (1993-01-01), Kusase
Emerson Electric Co.
LaBalle Clayton E.
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