公开(公告)号：US6128174A

公开(公告)日：2000-10-03

申请号：US921298

申请日：1997-08-29

Applicant: Rogers C. Ritter ,  Peter R. Werp ,  Michael A. Lawson

Inventor： Rogers C. Ritter ,  Peter R. Werp ,  Michael A. Lawson

IPC: A61B19/00 ,  A61F2/02 ,  A61N2/02 ,  H01F7/18 ,  H02N15/00

CPC classification number: H02N15/00 ,  A61B34/70 ,  A61B34/73 ,  A61N2/02 ,  A61F2250/0001 ,  H01F7/1883

Abstract: A method and apparatus for ramping current in an electromagnet in which a coil is used to generate the magnetic field provides rapid changes in the generated magnetic field. The method allows a change in current in the coil to be accomplished more rapidly than by applying a step change in voltage, when superconducting coils subject to quenching are used or when nonsuperconducting coils subject to other physical limitations are used. The method requires that both the current I(t) through the coil and the first derivative of the current vary with respect to time t during the ramping period, so that magnitude of the derivative of the current is higher when the magnitude of applied current is lower, lower when the magnitude of the applied current is higher. One variation of this method supplies (or removes) a constant amount of power from the magnetic field of the magnet, while another variation compensates for both self-generated eddy current losses and self-generated high field effects. The method can be used to guide a magnetic seed and in other applications. The apparatus includes, in its most general form, an electromagnetic coil, a generator for applying an initial current to the coil, and a processor controlling the generator that causes the current to ramp from an initial to a final value in accordance with the methods described above.

Abstract translation: 用于使线圈用于产生磁场的电磁铁中的电流斜坡增加的方法和装置提供所产生的磁场的快速变化。 当使用经受淬火的超导线圈或者当使用受其他物理限制的非超导线圈时，该方法允许线圈中的电流变化比通过施加电压的阶跃变化更快地实现。 该方法要求通过线圈的电流I（t）和电流的一阶导数在斜坡期间相对于时间t变化，使得当施加的电流的大小为 当施加的电流的大小较高时，较低，较低。 该方法的一个变型提供（或去除）来自磁体的磁场的恒定量的功率，而另一个变化补偿了自生成的涡流损耗和自生成的高场效应。 该方法可用于引导磁性种子和其他应用。 该装置以其最通用的形式包括电磁线圈，用于向线圈施加初始电流的发生器，以及控制发电机的处理器，其根据所描述的方法使电流从初始值​​向最终值斜坡 以上。

公开(公告)号：US6005763A

公开(公告)日：1999-12-21

申请号：US26627

申请日：1998-02-20

Applicant: Christopher North

Inventor： Christopher North

IPC: F02D41/20 ,  H01F7/124 ,  H01F7/18 ,  H01H47/32

CPC classification number: F02D41/20 ,  H01F7/1883 ,  F02D2041/201 ,  F02D2041/2027 ,  F02D2041/2075 ,  H01F7/124

Abstract: Pulsed-energy controllers and methods of operation thereof for driving inductive loads such as the actuator coil or coils of electromechanical actuators. The controllers utilize an inductor through which an initial current is established through a first circuit. The inductor is then switched across the actuator coil or other inductive load in a second circuit and the first circuit is opened. The back EMF of the inductor, limited by a high voltage protective device, causes a rapid rise in the current through the actuator coil, the rise being much faster than could be achieved by merely coupling the supply voltage, as used to establish the current in the inductor, directly to the actuator coil. By proper selection of the controller circuit and its parameters, the initial rapid current rise may continue to a current higher than a steady state current, after which the current will decrease to or toward the lower steady state current until the current pulse is terminated. Various embodiments are disclosed.

Abstract translation: 脉冲能量控制器及其操作方法，用于驱动诸如致动器线圈或机电致动器的线圈的感应负载。 控制器利用电感器，通过第一电路建立初始电流。 然后在第二电路中将电感器切换到致动器线圈或其它感性负载，并且第一电路被打开。 由高压保护装置限制的电感器的反电动势使得通过致动器线圈的电流快速上升，这比通过仅仅耦合电源电压可以实现的快得多，用于建立电流 电感器，直接到致动器线圈。 通过适当选择控制器电路及其参数，初始快速电流上升可能持续到高于稳态电流的电流，之后电流将降低到或低于稳态电流，直到电流脉冲终止。 公开了各种实施例。

公开(公告)号：US5120142A

公开(公告)日：1992-06-09

申请号：US554020

申请日：1990-07-17

Applicant: Takashi Fujiwara ,  Masayuki Matsubayashi

Inventor： Takashi Fujiwara ,  Masayuki Matsubayashi

IPC: B41J9/44 ,  B41J9/50 ,  H01F7/18

CPC classification number: H01F7/1883 ,  B41J9/50

Abstract: In a printing device employing a solenoid for driving a printing hammer, provided are switching member for ON/OFF operating electric current flowing through the solenoid coil, voltage generating member for generating voltage in accordance with the electric current, converting member for converting the generated voltage to a digital value, chopping member for comparing the converted digital value with a predetermined comparison value, while for turning on the switching member when the converted value is smaller than the predetermined comparison value and turning off the switching member when the converted value is larger than the predetermined comparison value, detecting member for detecting voltage relating to a driving operation of said solenoid, and controlling member for controlling the predetermined comparison value so as to be varied in an amount based upon the detected voltage. Thus, the current flowed through the solenoid is controlled so as not to be largely varied.

公开(公告)号：US3909681A

公开(公告)日：1975-09-30

申请号：US52522074

申请日：1974-11-19

Applicant: HONEYWELL INF SYSTEMS

Inventor： CAMPARI ALFREDO ,  VIGINI GIORGIO

IPC: H02H7/00 ,  B41J9/44 ,  G06K15/06 ,  H01F7/18 ,  H01H47/32

CPC classification number: H01F7/1883 ,  B41J9/44

Abstract: This disclosure relates to a driving circuit for driving a coil of an electromagnet for the actuation of a hammer in a high speed impact printer of data handling systems, which driving circuit includes first switching means upstream of the coil, second switching means downstream of the coil, current sensing means for sensing current in the coil, a closed unidirectional current path including the second switching means, the coil in a diode, first control circuit means for actuating the first switching means in response to an input control signal, second control circuit means for switching on the second switching means in response to the first input control signal and for the entire duration of the input control signal, and a bistable device triggered by the current sensing means to assume one of two electrical states when the sensed current reaches a predetermined value and to provide an output signal corresponding to that one state, the output signal being effective to switch off the first switching means even in the presence of the input control signal.

Abstract translation: 本公开涉及一种驱动电路，用于驱动用于在数据处理系统的高速冲击打印机中致动锤的电磁体的线圈，该驱动电路包括线圈上游的第一开关装置，线圈下游的第二开关装置 用于感测线圈中的电流的电流感测装置，包括第二开关装置的闭合单向电流路径，二极管中的线圈，用于响应于输入控制信号致动第一开关装置的第一控制电路装置，第二控制电路装置 用于响应于所述第一输入控制信号和所述输入控制信号的整个持续时间来接通所述第二开关装置，以及当所述感测电流达到预定值时由所述电流感测装置触发的双稳态装置采取两种电状态之一， 并且提供与该一个状态相对应的输出信号，该输出信号有效地关闭f 第一次切换装置即使存在输入控制信号。

公开(公告)号：US20150159575A1

公开(公告)日：2015-06-11

申请号：US14412307

申请日：2013-06-21

Applicant: Robert Bosch GmbH

Inventor： Matthias Maess ,  Joerg Kuempel ,  Rainer Wilms ,  Uwe Richter

IPC: F02D41/26 ,  F02D41/38 ,  G05D7/06 ,  F02D41/20

CPC classification number: F02D41/26 ,  F02D41/20 ,  F02D41/2464 ,  F02D41/3809 ,  F02D41/3845 ,  F02D2041/2027 ,  F02D2041/2037 ,  F02D2200/06 ,  G05D7/0635 ,  H01F7/1883 ,  Y10T137/0318

Abstract: In a method for actuating a switch element of a valve device between a first end position and a second end position, in a normal mode within a cycle following an end of a first energization, a movement of the switch element in a first direction effected by the loading device is retarded in a first direction by a brief second energization (“braking pulse”) that is introduced within the cycle once a pause period has ended following a characteristic point in time. It is provided that the optimum pause period and/or the optimum variable characterizing the braking pulse be ascertained in an adaptation mode.

Abstract translation: 在用于在第一端部位置和第二端部位置之间致动阀装置的开关元件的方法中，在第一通电结束之后的循环内的正常模式中，开关元件在第一方向上的移动由第一方向 一旦暂停时段在特征时间点结束之后，通过短暂的第二次通电（“制动脉冲”）在第一方向上延迟加载装置。 提供了在适应模式中确定表征制动脉冲的最佳暂停时段和/或最佳变量。

公开(公告)号：US08830649B2

公开(公告)日：2014-09-09

申请号：US13498663

申请日：2010-08-10

Applicant: Christian Oppermann ,  Bernhard Streich

Inventor： Christian Oppermann ,  Bernhard Streich

IPC: H01H1/00

CPC classification number: H01F7/1811 ,  H01F7/1883

Abstract: A free-wheeling circuit is disclosed for the rapid reduction of a shutdown overvoltage of an inductive load when the latter is shut down. The free-wheeling circuit includes a switching threshold component by which the free-wheeling circuit becomes active more rapidly compared to a free-wheeling circuit without said switching threshold component, thereby ensuring a more rapid reduction of the shutdown overvoltage. If a control voltage provided by a control voltage source falls below a threshold voltage set by the switching threshold component, a capacitive energy accumulator is immediately discharged and not only when the control voltage is reduced to near zero, and the energy accumulator then activates the free-wheeling circuit for reducing the shutdown overvoltage, when in the nearly discharged state.

Abstract translation: 公开了一种续流电路，用于当电感负载关闭时快速降低感性负载的关断过电压。 续流电路包括切换阈值分量，与没有所述切换阈值分量的续流电路相比，续流电路更快地起作用，从而确保关闭过电压的更快速的降低。 如果由控制电压源提供的控制电压低于由开关阈值分量设定的阈值电压，则电容性蓄能器不仅在控制电压降至接近零时立即放电，并且能量蓄能器然后激活自由 用于减小关断过电压的电机，处于近放电状态。

公开(公告)号：US20130333905A1

公开(公告)日：2013-12-19

申请号：US13918525

申请日：2013-06-14

Applicant: Hilti Aktiengesellschaft

Inventor： Albert Binder

IPC: B25D11/06

CPC classification number: B25D11/064 ,  B25D2250/195 ,  B25D2250/221 ,  H01F7/1615 ,  H01F7/1883 ,  H01F2007/1692 ,  H02K33/12 ,  H02P25/032

Abstract: A machine tool with a tool holder which is equipped to mount a tool, such as a chiseling tool, moveably along a movement axis. A striking mechanism, such as a magnetic-pneumatic striking mechanism, contains a primary drive which is arranged around the movement axis and has in sequence in the impact direction a first magnetic coil, a permanent and radially magnetized annular magnet, and a second magnetic coil. The striking mechanism has a striker and an anvil arranged within the magnetic coils on the movement axis in sequence in the impact direction. In addition, the striking mechanism may have an air spring affecting the striker in the impact direction. The associated inventive control method provides that, during a movement of the striker opposite the impact direction, a measurement is measured for a voltage induced by the first magnetic coil. The controller starts an acceleration phase according to a change in the polarity of the induced voltage. The primary drive accelerates the striker in the impact direction during the acceleration phase.

Abstract translation: 具有工具架的机床，其具有可沿着运动轴线可移动地安装诸如凿子工具的工具。 诸如磁气打击机构的击打机构包括主驱动器，其围绕运动轴线布置并且沿冲击方向依次具有第一磁线圈，永久和径向磁化的环形磁体以及第二电磁线圈 。 撞击机构具有在冲击方向上依次沿着运动轴线布置在磁性线圈内的撞针和砧座。 此外，打击机构可能具有在撞击方向上影响撞针的空气弹簧。 相关的本发明的控制方法规定，在冲击器与撞击方向相反的运动期间，测量由第一电磁线圈感应的电压。 控制器根据感应电压极性的变化开始加速阶段。 主加速器在加速阶段加速冲击方向的冲击。

公开(公告)号：US5149214A

公开(公告)日：1992-09-22

申请号：US450137

申请日：1989-12-13

Applicant: Yoshikiya Futagawa ,  Katsuhiko Nishizawa

Inventor： Yoshikiya Futagawa ,  Katsuhiko Nishizawa

IPC: B41J2/30 ,  H01F7/18

CPC classification number: B41J2/30 ,  H01F7/1883

Abstract: A print wire driving apparatus for use in a printer having a stabilized power source, a print wire, an urging coil for driving said print wire and a power source including a smoothing capacitor for energizing the urging coil is provided. An accumulating circuit accumulates electro-magnetic energy generated in the urging coil once the current supplied to the urging coil has been turned OFF. A feedback circuit feeds back energy from the accumulating circuit to the smoothing capacitor when the voltage of the accumulating circuit reaches a predetermined level. A regulating circuit maintains the voltage of the accumulating circuit so that the voltage does not fall below the predetermined level, thereby obtaining high power source efficiency and high speed operation of the print wire.

公开(公告)号：US4634302A

公开(公告)日：1987-01-06

申请号：US806408

申请日：1985-12-09

Applicant: Daniel A. West ,  Lawrence S. Nyi ,  Ramon J. Ravelo

Inventor： Daniel A. West ,  Lawrence S. Nyi ,  Ramon J. Ravelo

IPC: B41J2/275 ,  H01F7/13 ,  H01F7/14 ,  H01F7/18 ,  B41J3/12

CPC classification number: H01F7/13 ,  B41J2/275 ,  H01F7/14 ,  H01F7/1883

Abstract: An improved dot matrix actuator is provided which includes a magnetic circuit formed of a yoke assembly and a pivotal armature. The armature is pivotally supported with respect to the yoke by means of a flexure assembly which eliminates the need for a true pivot between the two elements. The elements are shaped so as to maintain a constant small air gap therebetween so as to maximize the magnetic efficiency of the device while eliminating wear. The device is operated just below saturation of the magnetic circuit in order to maximize efficiency. In addition, the actuator includes several features for maximizing its speed and operational efficiency.

公开(公告)号：US4316056A

公开(公告)日：1982-02-16

申请号：US143200

申请日：1980-04-24

Applicant: Reiner Lichti

Inventor： Reiner Lichti

IPC: H01F7/18 ,  H01H47/32 ,  H03K17/0814 ,  H04L21/00 ,  B41J9/10

CPC classification number: H03K17/08146 ,  H01F7/1883 ,  H01H47/325

Abstract: A control circuit for momentarily energizing an electromagnetic coil in a teleprinting device recorder has a pair of switching transistors respectively operated by control pulses having a lag between respective switching times and a control transistor biased by a single operating voltage source. When a first of the switching transistors is switched on a rapid current rise in the coil takes place for immediate and rapid activation of the coil plunger which is followed by a maintenance time during which the first switching transistor is either switched off or is in pulsed operation and also during which the energy stored in the electromagnetic coil serves as the maintenance current source, which is followed by switching on of the second control transistor. By the addition of a diode between the coil and the operating voltage source, a feedback circuit is formed so that after disconnection of the electromagnetic coil, the energy stored in the coil is fed back into the operating currents supply network.

Abstract translation: 用于瞬时通电电报线圈的控制电路具有一对开关晶体管，分别由各个开关时间之间滞后的控制脉冲和由单个工作电压源偏置的控制晶体管驱动。 当开关晶体管中的第一个被接通时，线圈中的快速电流上升发生，用于线圈柱塞的即时和快速启动，其后是第一开关晶体管关断或处于脉冲操作的维护时间 并且在此期间，存储在电磁线圈中的能量用作维护电流源，随后是第二控制晶体管的导通。 通过在线圈和工作电压源之间添加二极管，形成反馈电路，使得在断开电磁线圈之后，存储在线圈中的能量被反馈到工作电流供应网络中。