MEASUREMENT SENSOR FOR AMPLITUDE OF SINUS SHAPE AC VOLTAGE

摘要

The invention is from field of electrical engineering and more specially regards to the branch of parameters measurements of electric signals. Target of the invention is increase speed of measurement. For this reason in paralel to the source of AC sinus shape voltage a three circuits comprising each a series coupled capacitor and rezistor are connected, two capacitors and rezistor of the third circuit are connected to one pole of source and three points of their mutual coupling are connected to AC input clamps of three phase bridge mode rectifier but DC output clamps of the rectifier are by-passed with measurement capacitor to plates of which measurement device is connected. Between the mentioned points of mutual coupling three-phase summetric AC voltage exists and as result voltage of measurement capacitor oscillate three time in the cycle which allows decrease capacitance of this capacitor, i.e., increase a reaction speed of device.