Electrical generator or motor structure – Dynamoelectric – Oscillating
Patent
1998-08-25
1999-11-23
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Oscillating
310216, 310254, 310258, 310156, 335229, 335281, H02K 3316, H02K 3300
Patent
active
059905840
ABSTRACT:
A permanent magnet D.C. torque motor has the stator mounted in cantilever from a base and nested in a cup-shaped rotor journalled for rotation on the base. The permanent magnets are disposed about the inner periphery of the rotor. The stator core has a plurality of radially outwardly directed webs with coils therearound and may be formed integrally as one-piece or laminated. The pole segments may be integrally formed with the web or attached as separate members. The pole segments have truncated cylindrical pole shoe surfaces forming radial air gaps with the rotor magnets. The pole segments extend axially and transversely beyond the webs. The axial pole segment extensions provide increased total flux for a given motor volume without an increase in ampere turns of electrical energization. The motor of the present invention is particularly suitable as an engine air throttle actuator.
REFERENCES:
patent: 3644763 (1972-02-01), Skrobisch
patent: 4345228 (1982-08-01), Idogaki et al.
patent: 4500861 (1985-02-01), Nelson
patent: 4575652 (1986-03-01), Gogue
patent: 4731778 (1988-03-01), Van Hout et al.
patent: 5355373 (1994-10-01), Salmon et al.
Detweiler Charles A.
Luo Jian
Turner David
Eaton Corporation
Johnston Roger A.
Mullins B
Ramirez Nestor
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