AC voltage sensing for voltage regulators,申请号US19890349016-传众专利搜索

AC voltage sensing for voltage regulators

申请公布号：US4970458(A)

申请号：US19890349016

申请日期：1989.05.08

申请公布日期：1990.11.13

申请人：

WESTINGHOUSE ELECTRIC CORP.

发明人：FOX, DAVID A.

分类号：G01R19/02

主分类号：G01R19/02

摘要：A voltage-sensing circuit producing a voltage-indicating signal representative of the voltages in a three-phase AC system produces several voltage-indicating signals which are representative of the phase voltages in a three-phase AC system. These voltage-indicating signals are squared, and the squared voltages are summed to produce an output signal having a DC voltage component with a magnitude proportional to the Mean Square value of the AC phase voltages. Unbalanced voltages in the three-phase system can be monitored by detecting the peak value of a ripple voltage imposed on the DC voltage component of the output of the circuit.