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公开(公告)号：US20220293372A1
公开(公告)日：2022-09-15
申请号：US17632308
申请日：2020-10-05
摘要： A coil drive device energizes an operation coil to close an electromagnetic contactor. A rectifier outputs, to a power supply line, an input voltage obtained by full-wave rectification of an AC voltage supplied from a main power source. A controller controls on and off of a switching element connected to a power supply line in series with the operation coil. The controller controls a duty ratio that is an on period ratio of the switching element in each switching period in accordance with a value of a parameter calculated from a detected value of the input voltage, in at least a partial period after start of energization of the operation coil in response to a close command for the electromagnetic contactor.
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2.发明授权
公开(公告)号：US5982605A
公开(公告)日：1999-11-09
申请号：US72692
申请日：1998-04-28
CPC分类号： H01H47/325 , H01H47/36
摘要： A solenoid driver circuit adapted for use with a digital magnetic latchingolenoid which has first and second solenoid coils. The solenoid driver circuit includes a bridge circuit which receives a logic signal and first and second pulse signals. The solenoid driver circuit also includes a voltage source which provides a direct current and first and second resistors respectively connected to the first and second solenoid coils. The bridge circuit, responsive to the logic signal and the first pulse signal, provides a first current path from the voltage source through the first solenoid coil and the first resistor to ground and a second current path from the direct current voltage source through the second solenoid coil to ground. The bridge circuit, responsive to the logic signal and the second pulse signal, provides a third current path from the direct current voltage source through the first solenoid coil to ground and a fourth current path from the direct current voltage source through the second solenoid coil and the second resistor to ground. The current flow through the current paths which include a solenoid coil and a resistor is approximately one amp, while the current flow through the currents paths which include only a solenoid coil is approximately twenty six amps. This allows for high speed control of the forces acting on the actuator of the solenoid.
摘要翻译： 一种适用于具有第一和第二电磁线圈的数字磁性锁存螺线管的螺线管驱动电路。 螺线管驱动器电路包括接收逻辑信号和第一和第二脉冲信号的桥接电路。 螺线管驱动器电路还包括电压源，其提供分别连接到第一和第二电磁线圈的直流电流和第一和第二电阻器。 桥接电路响应于逻辑信号和第一脉冲信号，提供从电压源通过第一螺线管线圈和第一电阻器接地的第一电流路径，以及从直流电压源通过第二电磁线圈的第二电流路径 线圈接地。 桥接电路响应逻辑信号和第二脉冲信号，提供从直流电压源通过第一螺线管线圈接地的第三电流路径和从直流电压源通过第二螺线管线圈的第四电流路径，以及 第二个电阻接地。 包括螺线管线圈和电阻器的电流路径的电流约为1安培，而仅流过电磁线圈的电流流动的电流约为二十六安。 这允许对作用在螺线管的致动器上的力的高速控制。
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公开(公告)号：US3575641A
公开(公告)日：1971-04-20
申请号：US3575641D
申请日：1969-02-05
申请人： NASA
发明人： LONG HAROLD R , MENGES MARTIN J , MUGLER SAMUEL W
CPC分类号： G01W1/14
摘要： A precipitation detector and mechanism used to shut down a load during precipitation and activate a load upon completion of precipitation. The detector has thermistors in a bridge circuit. One of the thermistors is exposed to the elements and cooled upon being contacted with precipitation. This causes an imbalance in the bridge circuit the output of which actuates a relay that shuts down the load. Termination of precipitation allows the thermistor to warm up balancing the bridge circuit and the relay closes activating the load.
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公开(公告)号：US11735387B2
公开(公告)日：2023-08-22
申请号：US17632308
申请日：2020-10-05
CPC分类号： H01H47/36 , H01H47/002
摘要： A coil drive device energizes an operation coil to close an electromagnetic contactor. A rectifier outputs, to a power supply line, an input voltage obtained by full-wave rectification of an AC voltage supplied from a main power source. A controller controls on and off of a switching element connected to a power supply line in series with the operation coil. The controller controls a duty ratio that is an on period ratio of the switching element in each switching period in accordance with a value of a parameter calculated from a detected value of the input voltage, in at least a partial period after start of energization of the operation coil in response to a close command for the electromagnetic contactor.
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公开(公告)号：US10305390B2
公开(公告)日：2019-05-28
申请号：US15599929
申请日：2017-05-19
发明人： Said Lassal
IPC分类号： H02M7/06 , G05F1/46 , H01H50/02 , H01H50/20 , H01H50/36 , H03H7/01 , H01H47/22 , H01H47/32 , H01H47/36
摘要： The present invention relates to a filter circuit for eliminating capacitive inrush current occurring in electromagnetic coil control circuits controlling the actuator coil of electromagnetic contactors or relays. The filter circuit comprises input terminals to be connected with a direct current voltage, a first output terminal to be connected with a first terminal of the inductive load and a second output terminal to be connected to a second terminal of the inductive load, a first diode, wherein the cathode of the first diode is connected to said first output terminal and to said first input terminal, a second diode, wherein the anode of the second diode is connected to said second output terminal, and a filter capacitor which is connected between said second input terminal and to a node which interconnects the anode of said first diode and the cathode of said second diode.
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公开(公告)号：US20140204493A1
公开(公告)日：2014-07-24
申请号：US14219788
申请日：2014-03-19
CPC分类号： H02H9/02 , H01H47/001 , H01H47/226 , H01H47/32 , H01H47/36
摘要： A relay control circuit is disclosed. In one aspect, the relay control circuit is a hybrid of a double winding relay control scheme and a single winding relay control scheme.
摘要翻译： 公开了一种继电器控制电路。 一方面，继电器控制电路是双绕组继电器控制方案和单绕组继电器控制方案的混合。
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8.发明授权Means for controlling electromagnetic device having hermetically sealed contacts 失效用于控制具有气密密封触点的电磁装置的装置
公开(公告)号：US4047237A
公开(公告)日：1977-09-06
申请号：US617574
申请日：1975-09-29
CPC分类号： H01H51/282 , H01H1/66 , H01H51/284 , H01H51/287
摘要： The invention relates to hermetically sealed contacts, electromagnetic devices using such contacts, as well as method and means for controlling such electromagnetic devices.A hermetically sealed contact (reed switch), comprising a capsule enclosing at least two peripheral elastically mounted magnetically controlled cores permanently anchored in the ends of the capsule and a central elastically mounted magnetically controlled core at least partially overlapping the peripheral ones and secured in a supporting member arranged in the capsule intermediate of the inner ends of the peripheral cores, is, according to the invention, characterized by that the supporting member is made elastic and the elasticity thereof is less than the transverse elasticity of the central magnetically controlled core, the latter being secured symmetrically with respect to the elastic supporting member so that when a magnetic flux is applied to the cores, it gives rise to an electromagnetic force of attraction between the magnetically controlled cores, and the central core comes in or out of contact with one of the peripheral cores.The electromagnetic device of the present invention uses the hermetically sealed contact (reed switch) described herein above and comprises at least one magnetizing coil arranged externally of the capsule and connected to a power supply.
摘要翻译： 本发明涉及密封触点，使用这种触点的电磁装置，以及用于控制这种电磁装置的方法和装置。
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公开(公告)号：US20210110985A1
公开(公告)日：2021-04-15
申请号：US16599074
申请日：2019-10-10
申请人： Kay C Robinson, JR.
发明人： Kay C Robinson, JR.
IPC分类号： H01H47/32 , H01H47/36 , H03K17/56 , H03K17/0814
摘要： The electromagnetic coupler uses a coil to induce voltage onto a transistor. By controlling the amount of current that flows through the coil, one is able to can control the strength of the magnetic field emitted by the inductor. And by the controlling the q-point of the transistor, the amount voltage and current induced onto the transistor it can then potentially be used as a switch or an amplifier without any electrical/electronic connection to the internal coil. The use of a transistor enables high speed switching and the potential amplification of communication signals.
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公开(公告)号：US6028760A
公开(公告)日：2000-02-22
申请号：US965837
申请日：1997-11-07
申请人： Jan Abraham Ferreira
发明人： Jan Abraham Ferreira
IPC分类号： G01R20060101 , G01V20060101 , G01V3/165 , H01H20060101 , H02M20060101 , H02M7/53846 , H02M7/5387 , H03K20060101 , H01H47/36
CPC分类号： G01V3/165 , H02M7/53871 , Y02B70/1441
摘要： A pulse generator is provided for energizing a coil with period bipolar current pulses for the purposes of airborne prospecting. The pulses have a generally square waveform, and the pulse generator includes a resonant DC to AC converter circuit including a DC input and an output coupled to the coil. A control circuit is provided for controlling the switching of the converter, and a resonant capacitor is connected in parallel across the DC input. A decoupling diode is provide for decoupling the resonant capacitor from the DC input when the voltage across the resonant capacitor exceeds that of the DC input. The converter includes first and second resonant charging sub-circuits, first and second resonant discharging sub-circuits, first and second freewheeling sub-circuits and first and second exponential charging sub-circuits. The control circuit is arranged to control the amplitude and frequency content of the square waveform by switching the convertor circuit to operate between the above sub-circuit types in at least one controlled switching cycle during unipolar current pulse intervals. The circuit further includes a clamping circuit arranged to supply a substantially constant DC voltage to the coil which is higher than that of the DC input.
摘要翻译： 提供脉冲发生器用于为具有周期性双极电流脉冲的线圈供电，以进行机载探测。 脉冲具有大致正方形的波形，并且脉冲发生器包括包括DC输入和耦合到线圈的输出的谐振DC至AC转换器电路。 提供控制电路用于控制转换器的开关，并且谐振电容器并联连接在DC输入端。 当谐振电容两端的电压超过直流输入的电压时，去耦二极管用于将谐振电容器与直流输入端分离。 转换器包括第一和第二谐振充电子电路，第一和第二谐振放电子电路，第一和第二续流子电路以及第一和第二指数充电子电路。 控制电路被布置为通过在单极电流脉冲间隔期间在至少一个受控切换周期中切换转换器电路以在上述子电路类型之间操作来控制方波的幅度和频率含量。 该电路还包括钳位电路，该钳位电路被布置成向线圈提供基本上恒定的直流电压，该直流电压高于直流输入的直流电压。
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