-
公开(公告)号：US10958074B2
公开(公告)日：2021-03-23
申请号：US14374833
申请日：2012-02-01
摘要： This patent describes embodiments of systems, apparatus and methods to provide improved control and coordination of a multiplicity of electric distribution grid-connected, energy storage units deployed over a geographically-dispersed area.
-
公开(公告)号：US20160118795A1
公开(公告)日：2016-04-28
申请号：US14374833
申请日：2012-02-01
CPC分类号： H02J3/32 , G05B15/02 , H02J3/1807 , Y02E40/30
摘要： This patent describes embodiments of systems, apparatus and methods to provide improved control and coordination of a multiplicity of electric distribution grid-connected, energy storage units deployed over a geographically-dispersed area.
摘要翻译： 该专利描述了系统，装置和方法的实施例，以提供在地理上分散的区域上部署的多个配电并网的能量存储单元的改进的控制和协调。
-
3.发明授权Flux control for induction motor drive using load commutated inverter circuit 失效感应电动机驱动使用负载换向逆变电路的磁通控制
公开(公告)号：US4607206A
公开(公告)日：1986-08-19
申请号：US705964
申请日：1985-02-26
CPC分类号： H02J3/1892 , H02M5/4505 , H02M7/525 , H02P25/024 , H02P27/06 , H02P2201/13 , H02P2207/01
摘要： A system for controlling the operation of an alternating current induction motor having windings supplied by electrical power from the polyphase alternating current source includes a load commutated inverter circuit which is connected between the power source and the induction motor for furnishing electrical power to the motor. Controllers responsive to a command signal and a feedback signal indicative of motor operating parameters control the operation of said load commutated inverter circuit. There is further provided a fixed capacitor circuit connected between the windings of the motor for supplying reactive volt amperes (VARs) to said load commutated inverter circuit and said motor. Finally, there is provided a variable VAR generator connected between the motor windings for supplying VARs to said load commutated inverter circuit and said motor in response to the output of a third feedback control path which is also responsive to a command signal and prescribed operating parameter(s) of said load and/or said commutated inverter.
-
公开(公告)号：US4443673A
公开(公告)日：1984-04-17
申请号：US330429
申请日：1981-12-14
申请人： James W. Sember
发明人： James W. Sember
摘要： A variable aspect arc chute comprises a stack of pivotally-mounted plates which are held in electrical contact along one edge thereof by means of a bias spring or other device. The arc chute may be employed in a circuit interrupter, connected in parallel arrangement across main contacts which the present invention protects from excessive arcing damage.
摘要翻译： 可变方面的电弧槽包括一堆枢转安装的板，其通过偏置弹簧或其它装置沿其一个边缘保持电接触。 电弧槽可以用于电连接断路器，并联布置在主触头上，本发明防止过度的电弧损坏。
-
5.发明授权Closed loop pulse width modulator inverter with volt-seconds feedback control 失效具有伏秒反馈控制的闭环脉宽调制器逆变器
公开(公告)号：US5450306A
公开(公告)日：1995-09-12
申请号：US987498
申请日：1992-12-07
申请人： Luis J. Garces , James W. Sember
发明人： Luis J. Garces , James W. Sember
IPC分类号： H02M5/458 , H02M7/5387 , H02M1/12
CPC分类号： H02M7/53875 , H02M5/458 , H02M2001/0022 , H02M2001/385
摘要： A closed loop pulse width modulator (PWM) inverter corrects for variations and distortion in the output AC voltage waveform caused by non-linearities of the switching devices or changes in the DC link voltage. A signal is generated that is a volt-seconds representation of the voltage error between a voltage command and the actual AC output voltage of the PWM inverter. The volt-seconds error signal becomes a controlling means in the closed loop of the PWM inverter to regulate the output AC voltage of the PWM inverter. Another signal that represents changes in the DC link voltage also modifies the voltage command signal. The system will compensate for the non-linear behavior of the PWM inverter due to deadtime, minimum on-times and off-times, and DC link voltage variations and voltage drops across the switching devices, and will also allow the operation of the inverter in a linear fashion for the region of operation when one or more of its phases are saturated, i.e., either full on or full off.
摘要翻译： 闭环脉宽调制器（PWM）逆变器校正由开关器件的非线性或直流母线电压变化引起的输出交流电压波形的变化和失真。 产生一个信号，该信号是电压指令与PWM逆变器的实际交流输出电压之间的电压误差的伏秒表示。 伏秒误差信号成为PWM逆变器闭环控制装置，用于调节PWM逆变器的输出交流电压。 代表DC链路电压变化的另一个信号也修改了电压指令信号。 该系统将补偿PWM逆变器由于死区时间，最小导通时间和关断时间以及直流链路电压变化和开关器件两端的电压降而导致的非线性特性，并且还可以使逆变器工作在 当其一个或多个相饱和时，即完全开启或关闭时，对于操作区域的线性方式。
-
6.发明授权
公开(公告)号：US5012172A
公开(公告)日：1991-04-30
申请号：US351491
申请日：1989-05-09
申请人： James W. Sember
发明人： James W. Sember
摘要： A method for operating a multi-phase switched reluctance motor is a generator mode includes gating switches connected in series with selected ones of the phase windings of the motor into conduction to establish current flow in a selected one of the windings. The switches are thereafter disabled and current is forced to commutate into flyback diodes whereby the current is returned to an associated DC bus. The instant at which the conducting switches are gated out of conduction is selected or measured in angular displacement between an associated stator pole and a corresponding rotor pole by establishing a preselected magnitude of current such that when the current in the winding reaches that magnitude, the switches are disabled. The voltage at the DC bus is regulated during generator mode operation by adjusting the phase angle measured between a stator pole and a corresponding rotor pole at which the switches are gated into conduction. The voltage is alternatively regulated at the DC bus by adjusting the phase angle at which the switches are disabled if the generated current does not reach the preselected magnitude. Overcurrent protection is included to reduce the turn-on angle if the current in the DC bus exceeds another preselected magnitude.
-
公开(公告)号：US5012171A
公开(公告)日：1991-04-30
申请号：US351505
申请日：1989-05-09
申请人： James W. Sember
发明人： James W. Sember
摘要： A method of controlling a switched reluctance motor during high speed operation in an operational range when the counter electromotive force exceeds the available DC source voltage and, therefore, the maximum desired converter current cannot be obtained, establishes torque control in a feedforward manner by controlling current pulse position.
-
公开(公告)号：US4933620A
公开(公告)日：1990-06-12
申请号：US351504
申请日：1989-05-09
摘要： A method and apparatus for improving the operation of a switched reluctance motor at low speed incorporates an advance angle regulator which regulates the firing angle of current pulses to the switched reluctance motor so that over a wide range of speeds and levels for direct current source voltages, the winding current reaches a commanded set point at a commanded angle. The advance angle regulator may comprise a closed loop regulator which includes apparatus for detecting the actual angular position at which motor current reaches a commanded level and adjusts the turn-on angle to shift the angle at which current reaches its desired level to a desired angle. The regulator incorporates a feedforward portion and an integral portion. The feedforward portion is utilized primarily to accommodate situations in which there is no current feedback. The integral portion provides the primary regulation when current is regulated to its desired value. The regulator causes the torque versus current command to have a transfer function which does not depend upon speed or DC source voltage over a wide range of speed, voltage and torque.
-
公开(公告)号：US4609990A
公开(公告)日：1986-09-02
申请号：US638003
申请日：1984-08-06
申请人： James W. Sember , Loren H. Walker
发明人： James W. Sember , Loren H. Walker
摘要： A method of developing a signal representative of the instantaneous frequency of an alternating current signal encompasses first determining the apparent frequency of the signal at the ends of sampling periods (e.g., half cycles). From successively derived apparent frequencies the rate of change in frequency is calculated. The actual frequency signal is then generated as a function of the apparent frequency and the rate of change. In a specific implementation, the method is employed to develop a signal representative of the rotational speed of a motor.
摘要翻译： 开发代表交流信号的瞬时频率的信号的方法包括首先确定采样周期（例如，半周期）结束时的信号的视在频率。 从连续导出的视频，计算出频率变化率。 然后根据视频和变化率生成实际频率信号。 在具体实施方式中，采用该方法开发代表电动机转速的信号。
-
10.发明授权Excitation current control for induction motor drive using load commutated inverter circuit 失效感应电动机驱动的励磁电流控制采用负载换向逆变电路
公开(公告)号：US4600874A
公开(公告)日：1986-07-15
申请号：US705962
申请日：1985-02-26
CPC分类号： H02J3/1892 , H02M5/4505 , H02M7/525 , H02P25/024 , H02P27/06 , H02P2201/13 , H02P2207/01
摘要： A system for controlling the operation of an alternating current induction motor having windings supplied by electrical power from the polyphase alternating current source includes a load commutated inverter circuit which is connected between the power source and the induction motor for furnishing electrical power to the motor. Controllers responsive to a command signal and a feedback signal indicative of motor operating parameters control the operation of said load commutated inverter circuit. There is further provided a fixed capacitor circuit connected between the windings of the motor for supplying reactive volt amperes (VARs) to said load commutated inverter circuit and said motor. Finally, there is provided a variable VAR generator connected between the motor windings for supplying VARs to said load commutated inverter circuit and said motor in response to the output of a third feedback control path which is also responsive to a command signal and prescribed operating parameter(s) of said load and/or said commutated inverter.
摘要翻译： 用于控制具有来自多相交流电源的电力提供的绕组的交流感应电动机的操作的系统包括连接在电源和感应电动机之间的用于向电动机提供电力的负载换向逆变电路。 响应于命令信号的控制器和指示电动机操作参数的反馈信号控制所述负载换向逆变器电路的操作。 还提供了一个固定电容器电路，其连接在电动机绕组之间，用于向所述负载换向逆变器电路和所述电动机提供无功伏安（VAR）。 最后，提供了连接在电动机绕组之间的可变VAR发生器，用于响应于第三反馈控制路径的输出而向所述负载换向逆变器电路和所述电动机提供VAR，该第三反馈控制路径也响应于指令信号和规定的操作参数 s）所述负载和/或所述换向逆变器。
-
-
-
-
-
-
-
-
-
搜索结果
10 条记录 (耗时 0.027 秒)
