Electronic potentiometer simulator
US4713521A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1984 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Nov 16, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding power system is described wherein a programmable controller and a conventional power supply are coupled by a circuit which simulates a control potentiometer. The coupling circuit provides an adjustable output signal intermediate between high and low potentials depending upon the level of an input control signal. The coupling circuit converts the input control signal into a pulse width modulated signal, multiplexes the high and low potentials in accordance with the pulse width modulated signal, and time-averages the multiplexed signal to provide an output control signal. An optical isolator is preferably included for direct current isolation of the input and output signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.