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    • 4. 发明授权
    • Circuit for controlling application of electricity to a coil of and
electric current switching apparatus
    • 用于控制对线圈和电流开关装置的电力施加的电路
    • US5910890A
    • 1999-06-08
    • US24373
    • 1998-02-12
    • James E. HansenMichael E. BauerDale L. GassWilliam J. Janutka
    • James E. HansenMichael E. BauerDale L. GassWilliam J. Janutka
    • H01H47/04H01H47/32H02H9/04H02M1/12H01H9/00
    • H01H47/325H02H9/047
    • A control circuit drives the coil of a contactor in response to a control voltage being applied. The control circuit includes a power supply that produces a regulated output voltage from the control voltage. The onset of the regulated output voltage starts a timer which controls the width of pulses produced by a PWM controller. The pulses control a transistor that applies the control voltage to the coil. Initially the pulses cause a high current to flow through the coil to close the contactor and after an interval of time the timer signals the PWM controller to shorten the pulses which applies lesser current to the coil to keep the contacts closed. A flyback circuit provides a relatively low reverse voltage drop path in parallel with the coil to maintain the electromagnetic field during the periods between the pulses. When the control voltage is removed to open the contactor, the flyback circuit provides a high reverse voltage drop path to promptly dampen the coil current.
    • 响应于施加的控制电压,控制电路驱动接触器的线圈。 控制电路包括从控制电压产生稳定的输出电压的电源。 调节输出电压的开始启动一个定时器,控制由PWM控制器产生的脉冲宽度。 脉冲控制向线圈施加控制电压的晶体管。 最初,脉冲引起高电流流过线圈以闭合接触器,并且在一段时间之后,定时器向PWM控制器发信号以缩短脉冲,从而将较小的电流施加到线圈以保持触点闭合。 回扫电路提供与线圈并联的相对低的反向电压降路径,以在脉冲之间的周期期间维持电磁场。 当去除控制电压以打开接触器时,反激电路提供高反向电压降路径,以迅速衰减线圈电流。
    • 8. 发明授权
    • Apparatus for testing an arc fault circuit interrupter
    • 用于测试电弧故障电路断路器的装置
    • US07307429B1
    • 2007-12-11
    • US11489036
    • 2006-07-19
    • Kevin L. ParkerDale L. GassJerome K. Hastings
    • Kevin L. ParkerDale L. GassJerome K. Hastings
    • G01R31/12H02H3/00
    • G01R31/3277
    • A test apparatus tests an arc fault circuit breaker with an arc fault generator having an input and an output. The test apparatus includes a first electrical connector electrically connected to the load side of an arc fault circuit interrupter. A second electrical connector is electrically connected to the input of the arc fault generator. A third electrical connector is electrically connected to the output of the arc fault generator. A plurality of fourth electrical connectors are electrically connected to one or more of a plurality of masking loads. A fifth electrical connector is electrically connected to another load. A two pole, plural position rotary selector switch provides a plurality of different configurations of at least the arc fault generator and the one or more masking loads downstream of the load side of the arc fault circuit breaker.
    • 测试装置用具有输入和输出的电弧故障发生器来测试电弧故障断路器。 测试装置包括电连接到电弧故障断路器的负载侧的第一电连接器。 第二电连接器电连接到电弧故障发生器的输入端。 第三电连接器电连接到电弧故障发生器的输出端。 多个第四电连接器电连接到多个屏蔽负载中的一个或多个。 第五电连接器电连接到另一负载。 两极多位置旋转选择开关提供至少电弧故障发生器和电弧故障断路器的负载侧下游的一个或多个屏蔽负载的多种不同配置。
    • 9. 发明授权
    • Solid state power controller with overload protection
    • 具有过载保护功能的固态电源控制器
    • US4626954A
    • 1986-12-02
    • US647763
    • 1984-09-06
    • Michael A. DamianoDale L. GassDennis M. KramerRichard F. Schmerda
    • Michael A. DamianoDale L. GassDennis M. KramerRichard F. Schmerda
    • H02H7/12H02M5/293H02H3/00
    • H02M5/293H02H7/12
    • A power controller with overload protection having an alternating current source (AC) connected through power lines (L1, L2) and a pair of power switching devices (FET1, FET2) and a current sensor resistance shunt (SH) in series to a load (LD). A line-derived control power supply circuit (LDS) is connected through one of the power switching devices (FET1) to the lower line (L1, L2) such that the control power supply current does not flow through the shunt (SH) or the load (LD). Close and open commands are applied from a control switch (CSW) through a threshold detector (DT) and a logic circuit (LG1) to operate a latch (LCH) that turns the power switching devices (FET1, FET2) on and off under the clocking control of a zero voltage detector (ZVD) and a zero current detector (ZCD) and the gating control of a minimum current circuit (MCC). An overload circuit (AVC, ITC, TTC) provides instantaneous trip of the latch on rupture current or timed trip of the latch on smaller overloads. Opto-isolated indicators (SS, ST) indicate trip conditions and loss of line voltage conditions as well as whether the load current is above or below a minimum current value which is a current level adequate for operation of the control system.
    • 具有过载保护的电力控制器具有通过电力线(L1,L2)和一对功率开关装置(FET1,FET2)和与负载串联的电流传感器电阻分流(SH)连接的交流电源(AC) LD)。 线路控制电源电路(LDS)通过功率开关器件(FET1)之一连接到下线(L1,L2),使得控制电源电流不流过分流器(SH)或 负载(LD)。 从控制开关(CSW)通过阈值检测器(DT)和逻辑电路(LG1)施加闭合和打开的命令,以操作锁存器(LCH),该锁存器(LCH)在下面的电源开关器件(FET1,FET2) 零电压检测器(ZVD)和零电流检测器(ZCD)的时钟控制和最小电流电路(MCC)的门控控制。 过载电路(AVC,ITC,TTC)在较小的过载情况下,提供闩锁对断路电流或定时跳闸的瞬时跳闸。 光电隔离指示器(SS,ST)指示跳闸条件和线路电压条件的损失,以及负载电流是否高于或低于最小电流值,该最小电流值是适用于控制系统操作的电流水平。