公开(公告)号：US3670273A

公开(公告)日：1972-06-13

申请号：US3670273D

申请日：1970-12-04

Applicant: SQUARE D CO

Inventor： RIES ROBERT G

IPC: G01R31/34 ,  H01H51/28 ,  H01H71/24

CPC classification number: G01R31/343 ,  H01H51/281 ,  H01H71/2445

Abstract: A reed relay mounted within a housing is responsive to a magnetic field induced in a flux-conducting clip mounted on an outer surface of the housing by current in a conductor passing through the clip. A flux diverting shield is placed over the relay in an adjusted position to provide the relay with a predetermined sensitivity to the magnetic field.

Abstract translation: 安装在壳体内的簧片继电器响应于通过穿过夹子的导体中的电流而安装在壳体的外表面上的导磁夹子中感应的磁场。 磁通转向屏蔽被放置在继电器的调整位置上，以向继电器提供对磁场的预定灵敏度。

公开(公告)号：US3656038A

公开(公告)日：1972-04-11

申请号：US3656038D

申请日：1970-12-04

Applicant: SQUARE D CO

Inventor： RIES ROBERT G ,  MONTROSS ROBERT C

IPC: H02P7/298 ,  H02P5/16

CPC classification number: H02P7/298

Abstract: In a control system for a direct current series motor, the contacts of a single throw reed relay are responsive to motor current through a winding in a motor supply conductor to selectively control the application of a motor field weakening shunt resistor by a switching circuit. The charging of a timing capacitor delays action of the switching circuit to prevent motor ''''hunting''''. The opening of the reed relay contacts under low motor load conditions permits charging of the capacitor and activating of the switching circuit to place the shunt resistor across the motor field for high speed operation. Under increased motor load, the reed relay contacts close and the capacitor discharges to time the removal of the shunt resistor from across the field. A by-pass transistor by-passes the reed relay contacts preventing activation of the switching circuit until the motor has reached its maximum unweakened field speed and the relay is provided with shunt windings to prevent ''''chattering'''' due to wavering motor current.

Abstract translation: 在用于直流串联电动机的控制系统中，单掷干簧继电器的触点响应于通过电动机供电导体中的绕组的电动机电流，以选择性地控制通过开关电路施加电动机弱磁分流电阻器。 定时电容器的充电延迟了开关电路的动作，以防止电机“狩猎”。 在低电机负载条件下，簧片继电器触点的打开允许电容器的充电和开关电路的启动，以使分流电阻跨过电机磁场进行高速运行。 在增加电机负载的情况下，簧片继电器触点闭合，电容器放电，以便分流电阻从场外移除。 旁路晶体管旁路干簧继电器触点，防止开关电路的激活，直到电机达到最大未衰减的励磁速度，并且继电器提供有分流绕组，以防止由于电动机电流波动引起的“颤动”。

公开(公告)号：US3590352A

公开(公告)日：1971-06-29

申请号：US3590352D

申请日：1969-04-28

Applicant: SQUARE D CO

Inventor： RIES ROBERT G ,  RETZER KENNETH W

IPC: H02P7/298 ,  H02P5/06

CPC classification number: H02P7/298

Abstract: A speed control circuit for a series field direct current motor. The circuit includes a reed relay that has a movable contact responsive to the current flow through the field and a resistance in a shunt circuit with the field. The reed relay through a transistor and a contactor causes the shunt circuit to be interrupted when the current flow through the motor increases above the predetermined value. The reed relay has a pair of coil windings arranged so that one of the windings generates a magnetic flux that opposes the flux generated by the current flow through the field and the other provides an output flux which adds to the flux generated by the field current so that movable contact will operate with a snap action. The flux outputs of each of the pair of coils is individually adjustable so the response of the relay to the upper and lower limits of a range of field current flow may be individually adjusted. The circuit further includes a capacitor which will cause the flux output of one of the coils to momentarily increase when the reed relay initially responds to an excess current in the field circuit.