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Arrangement for Driving and Supporting a Component Rotating at High Speed About an Axis

IP.com Disclosure Number: IPCOM000061176D
Original Publication Date: 1986-Jul-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Bohn, R: AUTHOR [+3]

Abstract

This article concerns an arrangement for driving and supporting a component rotating at high speed about an axis, in particular a magnetic flight height tester, a processor for magnetic disks and magnetic disks in magnetic disk storage systems, respectively. As shown in the figure, there is an aerostatic radial and axial air bearing 1 with a stationary component 2 and a rotating component 3. A support plate 4 is fixed to one axial end of air bearing 1, while a rotor 6 with a permanent magnet 7 of a collectorless DC motor 8 is fixed to the other axial end. Stator 10 of motor 8 is arranged on a base plate to which the stationary component 2 of air bearing 1 is fixed. The rotating component 3 of air bearing 1, to which a shaft 11 of support plate 4 and a shaft end 12 of motor 8 are fitted, takes the form of a hollow cylinder.

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Arrangement for Driving and Supporting a Component Rotating at High Speed About an Axis

This article concerns an arrangement for driving and supporting a component rotating at high speed about an axis, in particular a magnetic flight height tester, a processor for magnetic disks and magnetic disks in magnetic disk storage systems, respectively. As shown in the figure, there is an aerostatic radial and axial air bearing 1 with a stationary component 2 and a rotating component 3. A support plate 4 is fixed to one axial end of air bearing 1, while a rotor 6 with a permanent magnet 7 of a collectorless DC motor 8 is fixed to the other axial end. Stator 10 of motor 8 is arranged on a base plate to which the stationary component 2 of air bearing 1 is fixed. The rotating component 3 of air bearing 1, to which a shaft 11 of support plate 4 and a shaft end 12 of motor 8 are fitted, takes the form of a hollow cylinder. A free shaft 13, rotating along with the drive, is provided at the rotor support of motor 8 on the side averted from air bearing 1. One or several incrementing means 14, 15 for rpm measurement are arranged on the free shaft 13. In addition, a contact-free resolver 17, detecting the rotor position (the angular position of the shaft) is provided on the free shaft 13 and at one of its ends 16, respectively. Support plate 4 is provided with a clamping plate 18 for readily and exchangeably clamping magnetic disks 5 or other components to be rotated or processed....