Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1991-04-29
1994-06-28
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 67R, 310156, 310 88, H02K 708, H02K 714, H02K 2112, H02K 510
Patent
active
053250060
ABSTRACT:
A motor with a magnetic fluid bearing for suppressing vibration and irregular rotation as well as preventing the magnetic fluid from being scattered from a bearing portion in the inside of the motor. The motor includes a rotor having a polygon mirror mounted thereon, a stator unit having driving coils, a rotor position detector and a rotor revolution detector attached thereto, a magnetic fluid bearing unit having a magnetic seal and a dynamic pressure seal attached thereto and a magnetic bearing. A triple seal structure for magnetic fluid which includes a first fluid seal constituted by the seals of the bearing unit, a second fluid seal constituted by a magnet of the rotor and a third fluid seal constituted by a seal of the magnetic magnet is provided in the motor.
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patent: 5045738 (1991-09-01), Hishida et al.
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Akashi Sueo
Hiroyama Hiroo
Ishizaki Kosho
Kawaike Kazuhiko
Nii Katsutoshi
Hitachi , Ltd.
LaBalle Clayton E.
Stephan Steven L.
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