公开(公告)号：WO2020077056A1

公开(公告)日：2020-04-16

申请号：PCT/US2019/055567

申请日：2019-10-10

Applicant: FLUID HANDLING LLC

Inventor： RUFFO, Matthew J. ,  RUZICKA, Paul

IPC: E03B5/06 ,  E03B7/07 ,  E03B11/06 ,  F04D15/00 ,  F04D15/02 ,  G05D7/06

Abstract: A controller for a municipal water system having a pump connected to a suction line, featuring a signal processor and a memory module configured to: receive suction line pressure sensor signaling sensed by a suction line pressure sensor arranged on the suction line and containing information about a suction line pressure of water flowing in the suction line; receive low suction pressure limit signaling programmed in the memory module and containing information about a low suction pressure limit of the water flowing in the suction line; and provide control signaling containing information to control the operation of the pump depending on a relationship between the suction line pressure and the low suction pressure limit, based upon the suction line pressure sensor signaling and the low suction pressure limit signaling received. The control signaling may contain information to reduce or stop the water flowing in suction line if the suction line pressure falls below the low suction pressure limit.

公开(公告)号：WO2016172168A1

公开(公告)日：2016-10-27

申请号：PCT/US2016/028382

申请日：2016-04-20

Applicant: FLUID HANDLING LLC

Inventor： RUFFO, Matthew J. ,  RUZICA, Paul J.

IPC: H02H3/00

CPC classification number: H02H9/005 ,  H02P1/26 ,  H02P1/42

Abstract: A motor control circuit is provided for connecting or disconnecting an AC voltage to an AC motor, having a switch having two switch contacts, configured to respond to a process variable and move between open and closed switch contact positions to connect or disconnect the AC voltage to the AC motor; and a snubber circuit arranged across the switch contacts in parallel with the AC motor, and configured to respond to motor inductance when the switch is moved between the open and closed switch contact positions, and provide arc suppression in the switch by dissipating energy stored in the motor inductance. The snubber circuit may include a network having a resistor connected in series with a capacitor, or a metal oxide varistor, or a transient voltage suppressor.

Abstract translation: 提供电动机控制电路，用于将交流电压连接到交流电动机或断开交流电动机，该交流电动机具有具有两个开关触点的开关，其被配置为响应于过程变量并且在打开和闭合的开关触点位置之间移动以将AC电压连接或断开 交流电机; 以及缓冲电路，其布置在与所述交流电动机并联的所述开关触点上，并且被配置为当所述开关在所述开路和闭合的开关接触位置之间移动时响应于电动机电感，并且通过消耗所述开关中的能量来提供所述开关中的电弧抑制 电机电感。 缓冲电路可以包括具有与电容器串联连接的电阻器或金属氧化物变阻器或瞬态电压抑制器的网络。