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公开(公告)号：US4112475A
公开(公告)日：1978-09-05
申请号：US753406
申请日：1976-12-22
CPC分类号： H02H7/0811
摘要： A method and apparatus for detecting and correcting the occurrence of flashover in a direct current electric motor. The polarity and magnitude of voltage on the field winding of the motor is continuously monitored. Detection of a sudden reversal of the polarity of the field voltage accompanied by a rapid increase in magnitude results in the generation of a flashover signal. The flashover signal is coupled to power controlling elements regulating power supplied to the motor and is effective to force removal of power from the motor. In a preferred embodiment the apparatus is disclosed in a two-motor system with two field windings serially connected such that the field voltage monitoring is accomplished on a differential basis.
摘要翻译： 一种用于检测和校正直流电动机中闪络发生的方法和装置。 电机励磁绕组上的电压极性和幅值被连续监测。 检测伴随着大幅度的快速增加的场电压的极性的突然反转导致产生闪络信号。 闪络信号耦合到调节供应到电动机的电力的功率控制元件，并且有效地强制从电动机去除电力。 在优选实施例中，该装置被公开在具有串联连接的两个场绕组的双电机系统中，使得在差分的基础上实现励磁电压监视。
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公开(公告)号：US4096423A
公开(公告)日：1978-06-20
申请号：US766297
申请日：1977-02-07
CPC分类号： B60L7/003 , B60L7/22 , H02P3/08 , H02P7/281 , B60L2200/26 , Y02T10/642 , Y02T10/7258
摘要： Apparatus for increasing the available regenerative braking energy and for enabling low current control without frequency variation in a time-ratio controlled main thyristor power circuit for a direct current traction motor. A variable impedance element is serially inserted in a motor armature free-wheeling current path between a free-wheeling diode and the motor armature, the variable impedance element preferably comprising a power resistor and parallel connected thyristor. During electrical regenerative braking the thyristor is used to modulate the power resistor to thereby present a continuously variable impedance in the armature current path. During motoring at very low speeds the thyristor can be operated to modulate the power resistor and thus reduce the minimum controllable level of motor current normally limited to commutation current level without the necessity of reducing the main thyristor operating frequency. The thyristor is gated on by conventional means but is gated off by triggering the commutation circuit of the main thyristor, thus eliminating the need for a separate commutating circuit for the thyristor.
摘要翻译： 用于增加可再生制动能量并且用于在直流牵引电动机的时间比控制的主晶闸管电力电路中实现无频率变化的低电流控制的装置。 可变阻抗元件串联地插入在续流二极管和电动机电枢之间的电动机电枢续流电流路径中，可变阻抗元件优选地包括功率电阻器和并联连接的晶闸管。 在电再生制动期间，晶闸管用于调制功率电阻器，从而在电枢电流通路中呈现连续可变的阻抗。 在非常低速的电机运行期间，晶闸管可以操作来调制功率电阻器，从而降低通常限于换向电流电平的电动机电流的最小可控电平，而不需要降低主晶闸管工作频率。 晶闸管通过常规方法门控，但是通过触发主晶闸管的换向电路来关闭晶闸管，因此不需要用于晶闸管的单独的换向电路。
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3.发明授权Using sensed stator terminal voltages for determining alternator rotor position for cranking an engine 失效使用感测的定子端子电压来确定用于起动发动机的交流发电机转子位置
公开(公告)号：US5691625A
公开(公告)日：1997-11-25
申请号：US718033
申请日：1996-09-23
CPC分类号： F02N11/0859 , H02P6/18 , H02P9/08 , F02N11/04 , F02N2011/0896
摘要： A system for determining rotor position of an n-phase alternator driven by an inverter uses as inputs the stator terminal voltages of the alternator with respect to the negative power bus, which are already also provided as inputs to the inverter, and provides as outputs simulated rotor positions states. The simulated rotor position states are provided to one or more inverter controllers which, in turn, provide firing signals to one or more corresponding inverters which are used to crank an engine, e.g., an internal combustion engine of a diesel electric locomotive.
摘要翻译： 用于确定由逆变器驱动的n相交流发电机的转子位置的系统用作交流发电机相对于负电源总线的定子端子电压，其也已经被提供为反相器的输入，并且提供为模拟的输出 转子位置状态。 模拟的转子位置状态被提供给一个或多个逆变器控制器，这些逆变器控制器又向一个或多个相应的逆变器提供点火信号，该逆变器用于使发动机（例如柴油机车的内燃机）起动。
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4.发明授权
公开(公告)号：US4092571A
公开(公告)日：1978-05-30
申请号：US740333
申请日：1976-11-09
CPC分类号： B60L15/32 , B60L2200/26
摘要： A power match system for a train of individually powered traction vehicles in which two distinct types of power control systems are employed. The system includes a programmed power matched circuit which has programmed therein the volt-ampere characteristics of a motor operating under the control of one of the types of power control systems, such as a cam controlled resistor system. The power match circuit is serially inserted in the current command system for the other type of power control, such as a chopper controlled power system. A signal representative of the motor CEMF in the chopper system is supplied to the power match circuit which then regulates the current supplied by the chopper control power system in accordance with the programmed characteristics of the cam controlled resistor system. In this manner the motive power developed by the two distinct types of power control systems is matched whereby each type of system provides substantially the same pulling power to the train.
摘要翻译： 一种用于单个动力牵引车辆列车的动力匹配系统，其中采用两种不同类型的动力控制系统。 该系统包括编程的功率匹配电路，其在其中编程了在诸如凸轮控制的电阻器系统之类的功率控制系统之一的控制之下操作的电动机的伏特特性。 功率匹配电路串联插入电流指令系统中，用于其他类型的功率控制，如斩波控制电力系统。 代表斩波系统中的电动机CEMF的信号被提供给功率匹配电路，该电力匹配电路然后根据凸轮控制电阻器系统的编程特性来调节由斩波控制电力系统提供的电流。 以这种方式，由两种不同类型的功率控制系统开发的动力匹配，由此每种类型的系统为列车提供基本上相同的牵引力。
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公开(公告)号：US4037145A
公开(公告)日：1977-07-19
申请号：US638520
申请日：1975-12-08
CPC分类号： H02P7/29 , Y10S388/92
摘要： A method and control system for minimizing peak current levels in a direct current traction motor drive system in which the traction motor is powered by periodic current pulses metered from a direct current source by a controllable switch. The control system includes apparatus for comparing actual motor current to commanded motor current and for controlling the duty factor of the controllable switch in a manner tending to minimize any difference between actual and commanded currents. The control system further includes apparatus for changing the repetition rate of the current pulses in response to the magnitude of current in the motor, without effecting the commanded duty factor of the controllable switch, so that the ripple currents which are inversely related to repetition rate are reduced as average motor current is increased to thereby maintain total peak current levels within predetermined limits.
摘要翻译： 一种用于最小化直流牵引电动机驱动系统中的峰值电流水平的方法和控制系统，其中牵引电动机由可控开关从直流电源计量的周期性电流脉冲供电。 该控制系统包括用于比较实际的电动机电流与指令的电动机电流的比较装置，并且以以最小化实际电流和指令电流之间的差异的方式控制可控开关的占空比。 控制系统还包括用于响应于电动机中电流的大小来改变电流脉冲的重复频率的装置，而不影响可控开关的指令占空比，使得与重复频率成反比的纹波电流是 随着平均电动机电流增加而减小，从而将总峰值电流水平维持在预定限度内。
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