公开(公告)号：US20160133410A1

公开(公告)日：2016-05-12

申请号：US14832666

申请日：2015-08-21

Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Inventor： Christopher H. Bock ,  Christopher J. Wieloch ,  James J. Kinsella ,  Stefan T. Dziekonski

IPC: H01H47/22

CPC classification number: H01H47/22 ,  H01H47/325 ,  H01H50/22 ,  H01H50/546 ,  H01H51/065

Abstract: One embodiment describes an operating coil driver circuitry, which includes a control circuitry that outputs a trigger signal and a reference voltage; an operational amplifier that compares the reference voltage to a node voltage, in which the node voltage is directly related to current flowing through an operating coil of a switching device and the operational amplifier outputs a logic high signal when the node voltage is higher than the reference voltage and outputs a logic low signal when the node voltage is lower than the reference voltage; and a flip-flop that outputs a pulse-width modulated signal to instruct a switch to supply a desired current to the operating coil based at least in part on the trigger signal and the signal output by the operational amplifier.

Abstract translation: 一个实施例描述了一种操作线圈驱动器电路，其包括输出触发信号和参考电压的控制电路; 将参考电压与节点电压进行比较的运算放大器，其中节点电压与流过开关器件的工作线圈的电流直接相关，并且当节点电压高于参考电压时，运算放大器输出逻辑高电平信号 当节点电压低于参考电压时，电压输出逻辑低电平信号; 以及触发器，其输出脉冲宽度调制信号以指示开关至少部分地基于所述触发信号和由所述运算放大器输出的信号来向所述工作线圈提供期望的电流。