Browse Prior Art Database

Simple Adjustable Power Supply Testing Network

IP.com Disclosure Number: IPCOM000035276D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 3 page(s) / 55K

Publishing Venue

IBM

Related People

Bancroft, CE: AUTHOR [+3]

Abstract

A technique is described whereby a simple adjustable power supply testing network provides adjustable voltage levels which can be operated either manually or through a personal computer. The simplicity of the adjustable power supply testing network is such that expensive programmable power supplies are not required to perform automated testing procedures. Two applications are described in the use of the simple adjustable power supply testing networks through a selection of appropriate relays and potentiometers.

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 53% of the total text.

Page 1 of 3

Simple Adjustable Power Supply Testing Network

A technique is described whereby a simple adjustable power supply testing network provides adjustable voltage levels which can be operated either manually or through a personal computer. The simplicity of the adjustable power supply testing network is such that expensive programmable power supplies are not required to perform automated testing procedures. Two applications are described in the use of the simple adjustable power supply testing networks through a selection of appropriate relays and potentiometers.

Typically, the testing of component devices requires several different adjustable voltage levels. Since the testing takes place on automated machines, switching between the different voltage levels is under computer program control. The testing requires rapid switching between several individual voltage levels. Each individual voltage level is required to be adjustable over the entire range of the power supply. In prior art, this procedure would require a programmable power supply with associated communication cards and additional programming.

The concept described herein eliminates programmable power supplies, associated communication cards and the additional programming through the use of simple adjustable power supplies, whereby relays switch between external potentiometers to obtain the required voltages. When in automatic mode, the relays are controlled by the computer through high current/high voltage optically isolated digital output points. In manual mode, the relays are selected by pressing

(Image Omitted)

corresponding switches on a maintenance panel. The potentiometer values are set by maintenance operators. The number of relay/ potentiometer pairs and, therefore, the number of different voltage levels, is unlimited.

In a typical application of the above concept, a short conveyor is used from a main conveyor line to a testing nest. The conveyor has three speeds: fast, forward slow and reverse slow. The actual number of feet per second that these speeds attain is controlled by three potentiometers 1, as shown in Fig. 1. Potentiometers 1 are connected to conveyor DC drive unit 2 through relay contacts 3. In manual mode, a switch on the maintena...