Browse Prior Art Database

Cooling of a Voice Coil Motor for Disk Storages

IP.com Disclosure Number: IPCOM000078679D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Lennemann, E: AUTHOR [+4]

Abstract

As an actuator for generating the movement of magnetic heads in disk storages, an enclosed voice coil (VC) motor ] is employed which comprises field coil 2 arranged in magnetically conductive stator housing 3, and movable operating coil 4 sliding over stator pole core 5, and being mechanically linked with the magnetic head carriage.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 63% of the total text.

Page 1 of 2

Cooling of a Voice Coil Motor for Disk Storages

As an actuator for generating the movement of magnetic heads in disk storages, an enclosed voice coil (VC) motor ] is employed which comprises field coil 2 arranged in magnetically conductive stator housing 3, and movable operating coil 4 sliding over stator pole core 5, and being mechanically linked with the magnetic head carriage.

On the drive side of the VC motor 1, stator housing 3 is linked with closed air space 6 of the disk storage. Part 7 of operating coil 4, protruding into space 6 and whose length is a function of the movement of coil 4, is closed-loop cooled by a first circulating cooling air flow 8 generated by a disk pack air pump, not shown.

For cooling field coil 2 and the part of operating coil 4 located in the VC motor 1, a second helical, oppositely directed cooling air flow 9 is employed which is guided in a cooling channel. For forming the cooling channel surrounding the inner and outer surfaces of field coil 2, the latter is arranged in such a manner that an inner air gap 10 is provided between field coil 2, operating coil 4 and pole core 5, respectively. This inner air gap 10 is connected to the ambient air through apertures 11 in stator housing 3, on the drive side of the VC motor 1 only.

Between the outer surface of field coil 2 and stator housing 3, there is an outer air gap 12 which is closed on the drive side of the VC motor, and which through a second aperture 13 in stator housing 3 is al...