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Electromagnetic Actuator for Pneumatic Control

IP.com Disclosure Number: IPCOM000082411D
Original Publication Date: 1974-Dec-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Hu, PY: AUTHOR [+3]

Abstract

The device depicted schematically shows an electromagnetic actuator for pneumatic control. The device is capable of variable-pressure regulation which is controlled by an electrical current from a servo control, not shown. Damping is provided by the eddy-current phenomenon and is used to prevent pressure transients, which are undesirable for regulation and servo control.

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Electromagnetic Actuator for Pneumatic Control

The device depicted schematically shows an electromagnetic actuator for pneumatic control. The device is capable of variable-pressure regulation which is controlled by an electrical current from a servo control, not shown. Damping is provided by the eddy-current phenomenon and is used to prevent pressure transients, which are undesirable for regulation and servo control.

Fig. 1 depicts a bleed-type regulator having an unregulated input flow 10 and a regulated output flow 12. The regulated output pressure is controlled by hub/wire assembly 14 and bleed slots 16 and 18. Bleed slots 16 and 18 are opened to atmospheric pressure.

Hub/wire assembly 14 comprises a control plug 20 and a nonmagnetic conducting hub 22. The material of hub 22 is preferably aluminum or copper. A continuous wire 24 is wound around hub 22 and is terminated at a positive and a negative terminal. Hub/wire assembly 14 is positioned in magnetic air gap 26 of actuator magnet 28.

In operation, a given current is supplied to wire 24 which produces a magnetic force. This magnetic force causes hub/wire assembly 14 to position itself, and hence control plug 20 to regulate at a given pressure.

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