首页> 外国专利> Phase loss or overvoltage protector for motor - has signal fed to comparator via Zener network and driving cut=off relay in motor supply

Phase loss or overvoltage protector for motor - has signal fed to comparator via Zener network and driving cut=off relay in motor supply

机译:电动机的缺相或过压保护器-信号通过齐纳网络馈送到比较器,并且电动机电源中的驱动切断继电器

摘要

The electric motor protector provides an interruption of the motor supply in the event of overvoltage or loss of a phase. The protection circuit uses three transformers as current-voltage converters their primary windings being in series with the motor supply lines. The secondary winding outputs are rectified in a Graetz bridge and smoothed in an LC network (3, C2). This common output is fed across a potentiometer (R2, P, R3) and provides a signal in the case of overvoltage to a comparator (A2) via a Zener network (A4, Z5, Z6), the comparator output driving a cut-out relay (Rx) in the motor supply. In the absence of a phase a further comparator (A3) fed from a potentiometer (R10, R11) across the transistor regulated (T1, T2) supply drives a further comparator (A1) and the final relay driving comparator (A2).
机译:电动机保护器在过压或缺相时可中断电动机的供电。该保护电路使用三个变压器作为电流-电压转换器,它们的初级绕组与电动机电源线串联。次级绕组输出在Graetz桥中进行整流,并在LC网络(3,C2)中进行平滑处理。该公共输出通过电位计(R2,P,R3)馈送,并在过压情况下通过齐纳网络(A4,Z5,Z6)向比较器(A2)提供信号,比较器输出驱动一个断路器电机电源中的继电器(Rx)。在没有相位的情况下,从电位计(R10,R11)跨晶体管调节(T1,T2)的电源馈入的另一个比较器(A3)驱动另一个比较器(A1)和最终的继电器驱动比较器(A2)。

著录项

相似文献

  • 专利
  • 外文文献
获取专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号