APPARATUS AND METHOD FOR WETTING CURRENT MEASUREMENT AND CONTROL

摘要

A voltage signal and a wetting current are received from a switching device. A first pulse train is created from the voltage signal and the first pulse train has a first duty cycle that is proportional to the voltage at the switching device. The first pulse train is transmitted across an isolation barrier. The first pulse train that is received across the isolation barrier is digitized and at least one operating condition of the switching device is determined based upon the digitized pulse train. A second pulse train having a second duty cycle is received and the wetting current from the switching device is controlled based upon the second duty cycle.

主权项

1. A method of creating an electrical signal that varies predictably with respect to an excitation of a switching device, the method comprising:
receiving a voltage signal and a wetting current from a switching device; creating a first pulse train from the voltage signal, the first pulse train having a first duty cycle that is proportional to the voltage signal at the switching device; transmitting the first pulse train across an isolation barrier; digitizing the first pulse train that is received across the isolation barrier and determining at least one operating condition of the switching device based upon the digitized first pulse train; and receiving a second pulse train having a second duty cycle and controlling the wetting current of the switching device based upon the second duty cycle.