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公开(公告)号：US4152637A
公开(公告)日：1979-05-01
申请号：US808067
申请日：1977-06-20
CPC分类号： H02H9/021
摘要： A saturable reactor device for limiting alternating and direct current in an external electric circuit. In one form, the required magneto-motive force (mmf) bias for the saturable reactor is provided by a controllable flux bias element in order to minimize the required bias power. A current sensor provides a control signal representative of the alternating or direct current passing between the source and the load. This signal is used to control the magnitude of the bias so that the mmf provided by the bias element is a function of the current driving the load, permitting a current limiting threshold at a predetermined percentage of the current applied to the load. In an alternate form, the device may be adapted to limit bipolar current in the external circuit. In this form, the device includes an input circuit and an associated direct current saturable reactor limiter. In response to direct current of either positive or negative polarity passing through the external circuit, unidirectional current is driven through the input coil of the direct current limiter. The magnitude of the unidirectional current passing through the input coil is proportional to the magnitude of the current provided by the source. When the unidirectional current exceeds a predetermined threshold, the direct current limiter effectively provides a relatively high current-limiting impedance between the source and load of the external electric circuit. When the unidirectional current is below that threshold, the direct current limiter has minimal effect on the external electric circuit.
摘要翻译： 用于限制外部电路中的交流和直流电流的可饱和电抗器装置。 在一种形式中，可饱和电抗器所需的磁动力（mmf）偏压由可控的磁通偏置元件提供，以便使所需的偏置功率最小化。 电流传感器提供表示在源极和负载之间通过的交流或直流电流的控制信号。 该信号用于控制偏置的幅度，使得由偏置元件提供的mmf是驱动负载的电流的函数，允许以施加到负载的电流的预定百分比的限流阈值。 在替代形式中，该装置可适于限制外部电路中的双极性电流。 在这种形式中，该装置包括输入电路和相关的直流可饱和电抗器限制器。 响应于通过外部电路的正或负极性的直流电流，单向电流通过直流限制器的输入线圈驱动。 通过输入线圈的单向电流的幅度与由源提供的电流的大小成比例。 当单向电流超过预定阈值时，直流限流器在外部电路的源极和负载之间有效提供相对较高的限流阻抗。 当单向电流低于该阈值时，直流限制器对外部电路的影响最小。
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公开(公告)号：US4179729A
公开(公告)日：1979-12-18
申请号：US787930
申请日：1977-04-15
CPC分类号： H02M7/02 , H02J3/34 , H02K11/048 , H02K47/18 , H02M5/32
摘要： A power conversion system for converting between electrical power at different frequencies, including a rotary electrical machine including a rotor, a stator, first and second independently controllable field windings, and at least one armature winding for each phase; a switching circuit including a plurality of switching devices and having first terminal means interconnected with the armature winding which carries a high frequency signal established by the machine, and a second terminal for interconnection with an impedance establishing a lower frequency signal; the first field control circuit for monitoring the machine to sense phase difference between the optimum zero crossings and actual zero crossings of the higher frequency signal for driving the first field winding to adjust the phase of the higher frequency signal to minimize the phase difference; a second field control circuit for modulating the higher frequency signal carried by the armature winding with the lower frequency signal and for monitoring the second terminal means to sense amplitude difference between a selected one of the voltage and current parameters of the lower frequency signal and a reference level for driving the second field winding to adjust that parameter towards the reference level; and a switch firing circuit responsive to the machine voltage and one of the voltage and current parameters of the lower frequency signal at the second terminal means for selectively triggering to the on state and self-commutating to the off state the switching devices synchronously with the zero crossings of the higher frequency signal for transferring power between the higher and lower frequency signals through the switching circuit.
摘要翻译： 一种用于在不同频率的电力之间转换的功率转换系统，包括包括转子，定子，第一和第二可独立控制的励磁绕组的旋转电机以及每相的至少一个电枢绕组。 开关电路，包括多个开关装置，并且具有与承载由所述机器建立的高频信号的所述电枢绕组互连的第一端子装置，以及用于与建立较低频率信号的阻抗互连的第二端子; 第一场控制电路，用于监测机器，以感测最佳过零点和实际过零点之间的相位差，用于驱动第一场线圈，以调整较高频率信号的相位以使相位差最小化; 第二场控制电路，用于利用较低频率信号调制由电枢绕组承载的较高频率信号，并用于监测第二终端装置，以检测低频信号的电压和电流参数中的所选择的一个以及参考 用于驱动第二场绕组以将该参数调整到参考水平; 以及响应于所述机器电压和所述第二端子装置处的所述较低频率信号的电压和电流参数之一的开关点火电路，用于选择性地触发到导通状态并且将所述开关装置与所述开关装置同步地自整定为断开状态 用于通过开关电路在较高和较低频率信号之间传输功率的较高频率信号的交叉。
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3.发明授权Flywheel power supply having axial magnetic bearing for frictionless rotation 失效飞轮电源具有轴向磁轴承，用于无摩擦旋转公开(公告)号：US06262505B1
公开(公告)日：2001-07-17
申请号：US08824862
申请日：1997-03-26
申请人： Richard L. Hockney , Stephen B. Nichols , Geoffrey B. Lansberry , Francis E. Nimblett , Dariusz A. Bushko , Gita P. Rao , Luka Serdar , Michael E. Amaral , William E. Stanton , James O'Rourke
发明人： Richard L. Hockney , Stephen B. Nichols , Geoffrey B. Lansberry , Francis E. Nimblett , Dariusz A. Bushko , Gita P. Rao , Luka Serdar , Michael E. Amaral , William E. Stanton , James O'Rourke
IPC分类号： H02K709
CPC分类号： F16C32/0442 , F16C32/0457 , F16C2361/55 , F16F15/03 , F16F15/315 , H02K7/025 , H02K7/083 , H02K7/09 , Y02E60/16 , Y10T74/2131
摘要： A power supply device for providing uninterrupted power for a period of time is disclosed. The power supply device has a controller and a flywheel device. The flywheel device has a housing that contains a flywheel rotor and a motor/generator rotor. The flywheel rotor and the motor/generator rotor are mounted on a common shaft. An active axial magnetic bearing is located to support the shaft for frictionless rotation. The bearing provides support for the shaft, the flywheel rotor and motor/generator rotor. The axial magnetic bearing is attached to the housing and provides, in combination with the motor/generator rotor, a flux path and magnetic field to exert a magnetic force to lift the motor/generator rotor and the shaft on which it is mounted.
摘要翻译： 公开了用于在一段时间内提供不间断电力的电源装置。 电源装置具有控制器和飞轮装置。 飞轮装置具有包含飞轮转子和电动机/发电机转子的壳体。 飞轮转子和电机/发电机转子安装在公共轴上。 主动轴向磁轴承位于支撑轴以进行无摩擦旋转。 轴承为轴，飞轮转子和电机/发电机转子提供支撑。 轴向磁性轴承附接到壳体并与电动机/发电机转子组合提供磁通和磁场，以施加磁力以提升电动机/发电机转子及其所安装的轴。
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公开(公告)号：US4392100A
公开(公告)日：1983-07-05
申请号：US174552
申请日：1980-08-01
CPC分类号： H02P23/0027 , H02P23/07 , H02P21/00
摘要： An optimum efficiency control system for a variable torque/speed rotary a.c. induction machine including means for varying the frequency and magnitude of the excitation voltage/current supplied to the machine in three optimum efficiency regions of operation, a first fixed slip frequency region, a second flux saturation region, and a third voltage saturation region; and means for commanding the means for varying in the first fixed slip frequency region of operation with an excitation frequency command signal derived from the machine rotor speed and unconstrained maximum efficiency slip frequency, and an excitation voltage/current command signal derived from the difference between the commanded torque/speed of the machine and its actual torque/speed; in the second flux saturation region of operation with an excitation frequency command signal derived from the machine rotor speed and slip frequency command signal derived from the machine rotor speed and slip frequency which is a function of the difference between the commanded torque/speed of the machine and its actual torque/speed; and an excitation voltage/current command signal derived from the difference between the saturation flux and actual flux in the machine; and in the third voltage saturation region of operation with the saturation voltage and an excitation frequency command signal derived from the machine rotor speed and slip frequency which is a function of the difference between the commanded torque/speed and actual torque/speed of the machine.
摘要翻译： 用于可变转矩/速度旋转直流的最佳效率控制系统。 感应电机包括用于在三个最佳效率操作区域中改变提供给机器的激励电压/电流的频率和幅度的装置，第一固定转差频率区域，第二磁通饱和区域和第三电压饱和区域; 以及用于根据从机器转子速度和非约束最大效率转差频率导出的激励频率指令信号来命令用于改变第一固定转差频率操作区域的装置的装置，以及从所述第一固定转差频率区域的差异导出的激励电压/电流指令信号 指令扭矩/机器速度及其实际扭矩/转速; 在具有来自机器转子速度和滑差频率指令信号的激励频率指令信号的第二磁通饱和区域中，该转子速度和转差频率指令信号是从机器转子速度和转差频率导出的，该转速是机器的指令转矩/转速之间的差值的函数 及其实际扭矩/转速; 以及从机器中的饱和磁通和实际磁通之间的差导出的激励电压/电流指令信号; 以及饱和电压的第三电压饱和区域和从机器转子速度和转差频率导出的激励频率指令信号，其是指令转矩/速度与机器的实际转矩/转速之差的函数。
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公开(公告)号：US20080060850A1
公开(公告)日：2008-03-13
申请号：US11852741
申请日：2007-09-10
CPC分类号： E21B19/155
摘要： The invention provides a modular pipe handling system comprising a lift arm assembly including a base member and a lift arm mounted on the base member. The lift arm is pivotable between a horizontal and vertical position. The lift arm further comprises at least one clamping system for clamping a length of pipe to the lift arm, to allow movement of the pipe between the horizontal and vertical positions. The base member includes a leveling system associated therewith for independent leveling of the base member and corresponding lift arm relative to a drilling rig with which the pipe handling system is used. The base member may also include a positioning system for positioning of the base member a predetermined distance from the drilling axis of a predetermined drilling rig, wherein the positioning system is adaptable to vary the distance from the drilling axis. The base member includes a positioning system for positioning of the base member relative to a sub-base on which a drilling rig is selectively positioned during a drilling operation. The sub-base includes a rig indexing system for positioning of a drilling rig at a predetermined position thereon, and the location of the based member can be modified.
摘要翻译： 本发明提供了一种模块化管道处理系统，其包括提升臂组件，其包括基座构件和安装在基座构件上的提升臂。 提升臂可在水平和垂直位置之间枢转。 提升臂还包括至少一个夹紧系统，用于将一段管道夹紧到提升臂，以允许管道在水平位置和垂直位置之间移动。 基座构件包括与其相关联的调平系统，用于相对于使用管道处理系统的钻机独立调平基座构件和相应的提升臂。 基座构件还可以包括定位系统，用于将基座构件定位在与预定钻机的钻孔轴线预定的距离处，其中定位系统可适应于改变与钻削轴线的距离。 基座构件包括一个定位系统，用于相对于在钻孔操作期间选择性地定位钻机的基座定位基座构件。 底座包括用于在其上的预定位置定位钻机的钻台索引系统，并且可以修改基础构件的位置。
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