公开(公告)号：US4409640A

公开(公告)日：1983-10-11

申请号：US319487

申请日：1981-11-09

申请人： Mark V. Profio ,  James T. Libert ,  Julian C. Kampf

发明人： Mark V. Profio ,  James T. Libert ,  Julian C. Kampf

IPC分类号： H01H47/18

CPC分类号： H01H47/18

摘要： This disclosure depicts a novel abort cycle timer circuit for use with an AC source of electrical power and for operating electrical controls for machinery. The circuit provides a substantially DC voltage and current, first and second relays with normally open and normally closed contacts and a timing abort circuit. Opening a first of two switches causes the second of the two relays to energize after a time delay. Opening both switches causes the second relay to deenergize after a predetermined time. The novel circuit has improved immunity to electrical and magnetic noise.

摘要翻译： 该公开描述了一种新型的中止周期定时器电路，其用于与AC电源并用于机械的电气控制。 该电路提供了具有常开和常闭触点和定时中止电路的基本上直流电压和电流的第一和第二继电器。 打开两个开关中的第一个使得两个继电器中的第二个在延时后通电。 打开两个开关使得第二继电器在预定时间后断电。 新颖的电路具有改善对电磁噪声的抗扰性。

公开(公告)号：US4647825A

公开(公告)日：1987-03-03

申请号：US787012

申请日：1985-10-11

申请人： Mark V. Profio ,  James T. Libert

发明人： Mark V. Profio ,  James T. Libert

IPC分类号： H02H7/085 ,  H02P1/16 ,  H02P1/04 ,  H02H7/08

CPC分类号： H02H7/0855 ,  H02P1/16

摘要： A motor controller with means responsive to a motor condition for preventing termination of power to the motor in response to fault conditions when these fault conditions occur during start-up of the motor.

摘要翻译： 一种电动机控制器，其具有响应于电动机状态的装置，用于在电动机起动期间发生这些故障状况时，响应于故障状况来防止电动机停止电力。

公开(公告)号：US4345288A

公开(公告)日：1982-08-17

申请号：US260545

申请日：1981-05-04

申请人： Julian C. Kampf ,  Richard J. Graefe ,  Mark V. Profio

发明人： Julian C. Kampf ,  Richard J. Graefe ,  Mark V. Profio

IPC分类号： H02H7/085 ,  H02H7/09

CPC分类号： H02H7/085 ,  H02H7/09

摘要： A solid state overload relay protective apparatus for electric motors which includes not only the overload feature, but the additional features of underload and single phase protection. Small current transformers for sensing the current flow in each phase of the motor are utilized, like those found in the ground fault sensing art because a current-to-voltage converter circuit reflects a short circuit back to the secondary of the transformers. The signal from the current transformers which is proportional to the sensed current in the motor is fed through the converter, a scaling and summing amplifier adjustable for a wide range of motor full load currents, an ideal diode peak detector, a time integrator amplifier, to one input of a comparator circuit having a trip reference voltage signal at another input. The comparator provides an output signal to a transistorized trip level circuit that deenergizes a coil of an overload relay opening its contacts and interrupting power to the motor.

摘要翻译： 一种用于电动机的固态过载继电保护装置，不仅包括过载特性，而且还包括欠载和单相保护的附加特性。 用于感测电动机每相中的电流的小电流互感器被利用，如在接地故障感测领域中发现的那样，因为电流 - 电压转换器电路将短路反射回到变压器的次级。 与电动机中检测到的电流成比例的来自电流互感器的信号通过转换器馈送，对于宽范围的电动机满载电流可调节的缩放和求和放大器，理想的二极管峰值检测器，时间积分放大器 比较器电路的一个输入在另一个输入端具有跳闸参考电压信号。 比较器向晶体管跳闸电平电路提供输出信号，该电路使过载继电器的线圈断电，断开其触点并中断电机的电力。

公开(公告)号：US4858053A

公开(公告)日：1989-08-15

申请号：US82975

申请日：1987-08-04

申请人： Mark V. Profio

发明人： Mark V. Profio

IPC分类号： H02H7/085 ,  H02H7/09

CPC分类号： H02H7/09 ,  H02H7/085

摘要： A motor controller is adaptable to a wide range of motor currents by using an integrator circuit having an additional feedback arrangement for affecting the effective time constant of the integrator under specified conditions. The operational amplifier has an amplifier having a first input, a second input, and an output, an input resistor connected between an input of the operational amplifier and the first input of the amplifier, and a feedback impedance connected between the output of the amplifier and the first input of the amplifier. A voltage at the input of the operational amplifier is compared with a voltage at the first input of the amplifier. An auxiliary current path for the feedback impedance is provided when the voltage at the input of the operational amplifier has a predetermined relationship to the voltage at the input of the amplifier. When used as an integrator hurry-up circuit, the feedback impedance has an integrating capacitor, and the auxiliary current path for the integrating capacitor changes the time required for the capacitor to either charge or discharge, thereby effectively changing the integration time constant. An electric motor controller overload circuit using the improved operational amplifier permits switchably selecting a starting class for a selected electric motor.

摘要翻译： 电动机控制器通过使用具有附加反馈装置的积分器电路来适应各种电动机电流，以在特定条件下影响积分器的有效时间常数。 运算放大器具有放大器，其具有第一输入端，第二输入端和输出端，输入电阻器，连接在运算放大器的输入端和放大器的第一输入端之间，反馈阻抗连接在放大器的输出和 放大器的第一个输入。 将运算放大器输入端的电压与放大器第一输入端的电压进行比较。 当运算放大器的输入端处的电压与放大器的输入端的电压具有预定关系时，提供用于反馈阻抗的辅助电流通路。 当用作积分器快速电路时，反馈阻抗具有积分电容器，积分电容器的辅助电流通路改变电容器充电或放电所需的时间，从而有效地改变积分时间常数。 使用改进的运算放大器的电动机控制器过载电路允许可选地选择所选电动机的起动等级。

公开(公告)号：US4509088A

公开(公告)日：1985-04-02

申请号：US430074

申请日：1982-09-30

申请人： Mark V. Profio

发明人： Mark V. Profio

IPC分类号： H02H7/08 ,  H02H3/08

CPC分类号： H02H7/0816

摘要： A motor controller receives a signal proportional to motor current, integrates that signal during the high currents associated with starting, and holds a level during normal operation at speed within a maximum current limit. When an overload causes the motor to trip and there is a loss of power to the controller, a memory holds the level for a predetermined time to prevent an immediate restart of the motor.

摘要翻译： 电动机控制器接收与电动机电流成比例的信号，在与启动相关的高电流期间积分该信号，并且在正常操作期间以在最大电流限制内的速度保持电平。 当过载导致电动机跳闸并且控制器失去电力时，存储器将电平保持预定时间以防止电动机立即重启。