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Induction Motor for Blower in Data Processor Enclosure With Taps for Operating At Either of Two Power Frequencies

IP.com Disclosure Number: IPCOM000059837D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Myers, VH: AUTHOR [+2]

Abstract

An induction motor for a blower for cooling air is operable at either 50 or 60 Hertz by means of taps that provide a selected number of turns in the stator winding.

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Induction Motor for Blower in Data Processor Enclosure With Taps for Operating At Either of Two Power Frequencies

An induction motor for a blower for cooling air is operable at either 50 or 60 Hertz by means of taps that provide a selected number of turns in the stator winding.

The speed of an induction motor is its synchronous speed minus a slip that increases with load. The relationship between load and slip depends on the stator winding configuration. In normal operation, a motor develops more torque as it is slowed by an increasing load. A motor with a fewer turns slips less than a motor with more turns.

The power that is required for air cooling a particular enclosure is substantially constant and can be expressed as a particular blower driven at a particular speed. The blower motor has one set of windings that provides the desired speed with minimum slip at 50 Hertz. For operation at 60 Hertz, an additional winding is connected in series to cause additional s

Disclosed anonymously.

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