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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。
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公开(公告)号：US4634951A
公开(公告)日：1987-01-06
申请号：US743862
申请日：1985-06-03
申请人： Julian C. Kampf , Jeffrey A. Reichard , James T. Libert , Earl J. Curran, Jr. , Richard J. Graefe
发明人： Julian C. Kampf , Jeffrey A. Reichard , James T. Libert , Earl J. Curran, Jr. , Richard J. Graefe
CPC分类号： H02P1/28
摘要： Gradual starting of an electric motor is provided by increasing the voltage applied to the motor. A reduced voltage starter controls the application of a voltage derived from a line voltage to a motor by using a voltage ramp acceleration control circuit comprising, means for generating a ramp voltage having a predetermined rate of rise, means for controlling the voltage applied to the motor in response to the ramp voltage, means for sensing that the motor is running at substantially full speed, and means responsive to the means for sensing that the motor is running at substantially full speed for increasing the predetermined rate of rise of the ramp voltage, whereby under conditions where the motor is running at substantially full speed before the voltage applied to the motor reaches the line voltage, then the voltage applied to the motor will rise at the increased predetermined rate of rise of the ramp voltage.
摘要翻译： 通过增加施加到电动机的电压来提供电动机的逐渐启动。 降压起动器通过使用电压斜坡加速度控制电路来控制从线路电压得到的电压的应用，所述电压斜坡加速度控制电路包括用于产生具有预定升高速率的斜坡电压的装置，用于控制施加到电动机的电压的装置 响应于斜坡电压，用于感测电动机以基本全速运行的装置，以及响应于用于感测电动机以基本上全速运行的装置的装置，以增加斜坡电压的预定上升速率， 在电动机施加到电动机的电压达到线路电压之前，电动机以大致全速运行的条件下，施加到电动机的电压将以增加的斜坡电压的预定上升速率上升。
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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
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。
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公开(公告)号：US4344102A
公开(公告)日：1982-08-10
申请号：US188407
申请日：1980-09-18
CPC分类号： H01H47/32
摘要： An anti-telegraph circuit for locking out the circuit controlling the flow of direct current in a coil winding of an electromagnetically operated switching device, such as a contactor, from an alternating current source whenever improper control voltages are present which would cause repeated operations of the armature picking up and falling out of its sealed position.
摘要翻译： 一种防电路，用于锁定电路，控制电磁操作的开关装置（例如接触器）的线圈绕组中的直流电的流动，每当存在不正确的控制电压时，交流电源将导致重复操作 电枢从其密封位置拾起并脱落。
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公开(公告)号：US4714977A
公开(公告)日：1987-12-22
申请号：US059248
申请日：1987-06-05
CPC分类号： G04G15/003 , G04F1/005
摘要： A machine tool timing relay has immunity from electrical noise on a control signal, and has an oscillator capable of generating pulses having a predetermined frequency, a means for adjusting the predetermined frequency over a continuous range of frequencies, a counter capable of counting the pulses and capable of generating an output signal after a predetermined number of the pulses are counted, means responsive to a start signal for initiating the counter to count the pulses, an optical isolator circuit responsive to the control signal for generating a light, detecting the light, and generating the start signal in response to detecting the light in order to isolate the counter from electrical noise mixed with the control signal, an electrical contact, and an output circuit responsive to the output signal for operating the electrical contact when the counter generates the output signal so that the contact is operated after the counter counts a predetermined number of the pulses. The contact is controlled after an interval of time required for the oscillator to generate the predetermined number of pulses. An electromechanical relay serves as the contact.
摘要翻译： 一种机床定时继电器具有对控制信号的电噪声的抗扰性，并且具有能够产生具有预定频率的脉冲的振荡器，用于在连续的频率范围内调整预定频率的装置，能够计数脉冲的计数器 能够在预定数量的脉冲被计数之后产生输出信号的装置，响应于启动计数器的起始信号来对脉冲进行计数的装置，响应于用于产生光的控制信号的光隔离电路，检测光，以及 响应于检测到光而产生起始信号，以便当计数器产生输出信号时，将计数器与控制信号混合的电噪声，电触点和响应于输出信号的输出电路隔离以用于操作电接触 使得在计数器计数预定数量的脉冲之后操作触点。 在振荡器产生预定数量的脉冲所需的时间间隔之后控制触点。 机电继电器作为触点。
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6.发明授权
公开(公告)号：US4796142A
公开(公告)日：1989-01-03
申请号：US919917
申请日：1986-10-16
申请人： James T. Libert
发明人： James T. Libert
CPC分类号： H02H6/005 , H02H7/0833
摘要： A thermal overload detector and interrupter has a current transformer for monitoring load current and providing a current value signal, a microprocessor for calculating values related to load current and the thermal characteristics of a load, and an interrupter for selectively conducting and interrupting load current. The microprocessor computes a square current value from the current value signal and multiplies the square current value by a predetermined constant to obtain a multiplied square current value. The predetermined constant is related to the heat transfer characteristics of the load. A present running sum is computed in the microprocessor by adding the multiplied square current value to a past test value. The microprocessor then computes a proportionate present running sum by multiplying the present running sum by the predetermined constant. A present test value is computed by subtracting the proportionate present running sum from the present running sum. If the present test value exceeds a trip value, the microprocessor causes the interrupter to trip and interrupt the load current.
摘要翻译： 热过载检测器和断流器具有用于监测负载电流并提供电流值信号的电流互感器，用于计算与负载电流和负载的热特性相关的值的微处理器以及用于选择性地导通和中断负载电流的断续器。 微处理器从当前值信号计算平方电流值，并将平方电流值乘以预定常数，以获得乘法平方电流值。 预定常数与负载的传热特性有关。 在微处理器中通过将乘以的平方当量值加到过去的测试值来计算当前运行总和。 然后，微处理器通过将当前运行和乘以预定常数来计算比例的当前运行和。 通过从当前运行总和中减去比例的当前运行总和来计算当前测试值。 如果当前测试值超过跳闸值，微处理器会使断路器跳闸并中断负载电流。
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公开(公告)号：US4887018A
公开(公告)日：1989-12-12
申请号：US834685
申请日：1986-02-28
申请人： James T. Libert
发明人： James T. Libert
CPC分类号： H02H7/097 , H02H7/0833
摘要： A reduced voltage starter for gradually starting a polyphase motor having an acceleration control circuit for gradually applying power to the motor and detector circuits for detecting various fault conditions for terminating power to the motor. A shorted solid state switch detector senses when one of the semiconductor switches applying power to the motor is shorted to terminate the application of power from the remaining phases. A phase angle control circuit insures a uniform application of power to the motor. A phase rotation detection circuit detects when the three phases are in other than their correct sequence and terminates power in the event of such detection. An underload detection circuit senses when the current drops beneath a preselected reference after the motor has reached its full speed and terminates power in response to such detection. A line-to-line-to-line-to-neutral convertor produces signals representative of the line-to-neutral voltages which are necessary for other circuit functions.
摘要翻译： 一种降压起动器，用于逐渐启动具有用于逐渐向电动机供电的加速度控制电路的多相电动机和用于检测用于终止电动机功率的各种故障条件的检测器电路。 短路固态开关检测器检测到向电动机施加电力的半导体开关中的一个是否短路以终止来自剩余相的电力的施加。 相位角控制电路确保电机均匀地施加电力。 相位旋转检测电路检测三相何时不是其正确的序列，并且在这种检测的情况下终止电力。 欠载检测电路在电动机达到其全速之后感测电流何时下降到预选参考值，并响应于这种检测而终止电力。 线到线到中性转换器产生代表其他电路功能所必需的线对中性电压的信号。
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8.发明授权Apparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zero 失效用于通过使用微计算机控制晶闸管相对于电流达到零的装置，其响应于电压交叉零点
公开(公告)号：US4912390A
公开(公告)日：1990-03-27
申请号：US919916
申请日：1986-10-16
CPC分类号： H02P27/02 , H02J3/1892 , H02M1/083 , H02P23/26
摘要： Timing the firing of thyristors in a motor controller is done by using a microprocessor for timing relative to the event of current reaching zero, and by using hardware that generates firing signals in response to the voltage crossing zero. A motor controller has: thyristors for connecting the motor to a source of AC electrical energy; motor voltage zero crossing circuitry and motor current zero crossing circuitry for measuring a LAG TIME indicative of the time interval between the event of voltage applied; to the motor crossing zero and current flow to the motor reaching zero; a microprocessor generating a desired OFF TIME indicative of a desired time interval between the event of current flow to the motor reaching zero and firing of the thyristors; phase angle controller circuitry for firing the thyristors at a firing time after the event that the voltage applied to the motor crosses zero, the firing time being computed by adding the LAG TIME and the OFF TIME. The desired OFF TIME may be computed from an energy saving apparatus for adjusting the voltage applied to the motor to provide efficient operation for a highly loaded motor.
摘要翻译： 通过使用微处理器来相对于当前达到零的事件进行定时，并且通过使用响应于零电压产生触发信号的硬件来完成电动机控制器中的晶闸管的定时。 电机控制器有：用于将电机连接到交流电能源的晶闸管; 电动机电压过零电路和电动机电流过零电路，用于测量指示施加电压的事件之间的时间间隔的LAG TIME; 电机过零，电流流向电机达零; 产生指示在电动机电流达到零的事件和晶闸管的触发之间的期望时间间隔的期望的OFF时间的微处理器; 在施加到电动机的电压超过零的事件之后的点火时间点火晶闸管的相位角控制器电路，通过添加LAG TIME和OFF TIME来计算点火时间。 可以从用于调节施加到电动机的电压的节能装置计算期望的OFF TIME，以为高负载电动机提供有效的操作。
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公开(公告)号：US4802053A
公开(公告)日：1989-01-31
申请号：US24640
申请日：1987-03-11
CPC分类号： H02H3/253 , H02H11/004
摘要： A system for sensing the phase of a three-phase AC system and detecting phase reversal and undervoltage and phase unbalance and for providing a switching function when the system is not functioning properly.
摘要翻译： 用于感测三相交流系统的相位并检测相位反相和欠压和相位不平衡的系统，以及当系统运行不正常时提供开关功能的系统。
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公开(公告)号：US4724503A
公开(公告)日：1988-02-09
申请号：US841911
申请日：1986-03-20
申请人： James T. Libert
发明人： James T. Libert
CPC分类号： H02H7/097 , H02H7/0833
摘要： A reduced voltage starter for gradually starting a polyphase motor having an acceleration control circuit for gradually applying power to the motor and detector circuits for detecting various fault conditions for terminating power to the motor. A shorted solid state switch detector senses when one of the semiconductor switches applying power to the motor is shorted to terminate the application of power from the remaining phases. A phase angle control circuit insures a uniform application of power to the motor. A phase rotation detection circuit detects when the three phases are in other than their correct sequence and terminates power in the event of such detection. An underload detection circuit senses when the current drops beneath a preselected reference after the motor has reached its full speed and terminates power in response to such detection. A line-to-line to line-to-neutral converter produces signals representative of the line-to-neutral voltages which are necessary for other circuit functions.
摘要翻译： 一种降压起动器，用于逐渐启动具有用于逐渐向电动机供电的加速度控制电路的多相电动机和用于检测用于终止电动机功率的各种故障条件的检测器电路。 短路固态开关检测器检测到向电动机施加电力的半导体开关中的一个是否短路以终止来自剩余相的电力的施加。 相位角控制电路确保电机均匀地施加电力。 相位旋转检测电路检测三相何时不是其正确的序列，并且在这种检测的情况下终止电力。 欠载检测电路在电动机达到其全速之后感测电流何时下降到预选参考值，并响应于这种检测而终止电力。 线到线转换器产生代表其他电路功能所必需的线对中性电压的信号。
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