Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-02-21
1991-04-16
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 89, 360 9904, 360 9908, H02K 2900, H02K 2122, G11B 3300
Patent
active
050085735
ABSTRACT:
A motor for a disc drive unit is spatially separated from an enclosure housing the magnetic disks and read-write heads. The disks are mounted on a hub that is fixed to a shaft extending through the hub, having bearings at either end of the shaft. One end of the shaft extends outside of the enclosure, the rotor of the motor is fixed to this end of the shaft and is concentric therewith. The rotor has a rotor housing that is cup-shaped, with an opening facing away from the interior of the enclosure. Inwardly of the rotor housing is a stator mounted on a supporting member. The supporting member is detachably mounted to the enclosure for easy access to the stator. Further, a circuit board having control elements for the motor, including a Hall element mounted thereon, is provided on the supporting member for easy access to the circuit board. Each of the coils of the stator is divided into windings, and the controller for the motor switches the number of windings used so that more of the windings are used for each coil during start-up than during the running condition, when less work is needed.
REFERENCES:
patent: 4539611 (1985-09-01), Sidhu et al.
patent: 4805054 (1989-02-01), Kamoto et al.
patent: 4894735 (1990-01-01), Takahashi et al.
"Airflow System for Disk Drive", IBM Tech. Disclosure Bulletin, vol. 29, No. 3, Aug. 86, pp. 1258-1261.
Beppu Osamu
Chuma Akira
Moribe Toshihiro
Tezuka Youjiro
Hitachi , Ltd.
Rebsch D. L.
Stephan Steven L.
LandOfFree
Magnetic disk enclosure with detachable stator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic disk enclosure with detachable stator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic disk enclosure with detachable stator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-423290