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    • 1. 发明申请
    • Three wire drive/sense for dual solenoid
    • 三线驱动/双电磁铁感应
    • US20070242408A1
    • 2007-10-18
    • US11584373
    • 2006-10-20
    • Gary BergstromJoseph Seale
    • Gary BergstromJoseph Seale
    • H01H9/20
    • F01L9/04
    • A dual-acting solenoid, consisting of one armature moving between two latching positions against two yokes with two drive windings, is interconnected to bring out three wire terminations: a center and two ends. The electronic drive circuitry is similarly configured for three terminals. Optionally, the drive circuitry includes sensing and computation sufficient to determine the two currents and the two inductive voltages associated with the two windings. A method is shown for using six measured or computed parameters, two inductive voltages, two currents, and two time derivatives of current, to determine the simultaneous position and velocity of the armature. The method involves simultaneous solution of the equations for current and voltage in two time-varying inductors where the two inductances are constrained to correspond to the position of a single armature moving between two fixed magnetic yokes.
    • 一个双作用螺线管由一个电枢组成,两个闩锁位置在两个锁定位置之间,两个磁轭与两个驱动绕组相互连接,从而引出三个电线终端:中心和两端。 电子驱动电路类似地配置为三个端子。 可选地,驱动电路包括足以确定与两个绕组相关联的两个电流和两个感应电压的感测和计算。 示出了使用六个测量或计算参数,两个感应电压,两个电流和两个电流的时间导数的方法来确定电枢的同时位置和速度。 该方法包括在两个时变电感器中同时求解电流和电压方程,其中两个电感被限制为对应于在两个固定磁轭之间移动的单个电枢的位置。
    • 2. 发明申请
    • System and method for servo control of nonlinear electromagnetic actuators
    • 非线性电磁执行器的伺服控制系统和方法
    • US20060171091A1
    • 2006-08-03
    • US11149343
    • 2005-06-09
    • Joseph SealeGary Bergstrom
    • Joseph SealeGary Bergstrom
    • H01H47/00
    • H02N15/00B60L13/06F01L9/04F01L2009/0405F01L2009/0486F02D13/0253F02D41/1401F02D41/20F02D2041/001F02D2041/1419F02D2041/2027F02D2041/2055F02D2041/2058F02D2041/2079H01F7/1607H01F7/18H01F7/1844H01F2007/185H01F2007/1866H01F2007/1894H01H47/325H02K41/03H02P25/032Y02T10/18
    • Servo control using ferromagnetic core material and electrical windings is based on monitoring of winding currents and voltages and inference of magnetic flux, a force indication; and magnetic gap, a position indication. Third order nonlinear servo control is split into nested control loops: a fast nonlinear first-order inner loop causing flux to track a target by varying a voltage output; and a slower almost linear second-order outer loop causing magnetic gap to track a target by controlling the flux target of the inner loop. The inner loop uses efficient switching regulation, preferably based on controlled feedback instabilities, to control voltage output. The outer loop achieves damping and accurate convergence using proportional, time-integral, and time-derivative gain terms. The time-integral feedback may be based on measured and target solenoid drive currents, adjusting the magnetic gap for force balance at the target current. Incorporation of permanent magnet material permits the target current to be zero, achieving levitation with low power, including for a monorail deriving propulsion from the levitation magnets. Linear magnetic approximations lead to the simplest controller, but nonlinear analog computation in the log domain yields a better controller with relatively few parts. When servo-controlled solenoids provide actuation of a pump piston and valves, electronic LC resonance measurements determine liquid volume and gas bubble volume.
    • 使用铁磁芯材和电绕组的伺服控制基于对绕组电流和电压的监测以及磁通量的推断,力指示; 和磁隙,位置指示。 三阶非线性伺服控制被分为嵌套控制回路:快速非线性一阶内循环,通过改变电压输出使磁通跟踪目标; 以及较慢的几乎线性的二阶外循环,通过控制内循环的通量目标使磁隙跟踪目标。 内环使用有效的开关调节,优选地基于受控的反馈不稳定性来控制电压输出。 外环使用比例,时间积分和时间导数增益项实现阻尼和精确收敛。 时间积分反馈可以基于测量的和目标的电磁驱动电流,调整目标电流的力平衡的磁隙。 永磁材料的结合允许目标电流为零,实现低功率的悬浮,包括用于从悬浮磁体导出的单轨驱动。 线性磁场近似导致最简单的控制器,但是对数域中的非线性模拟计算产生的控制器数量较少,部件数量较少。 当伺服控制螺线管提供泵活塞和阀的致动时,电子LC共振测量确定液体体积和气泡体积。
    • 3. 发明申请
    • HEAT ENGINE WITH REGENERATOR AND TIMED GAS EXCHANGE
    • 具有再生器和定时气体交换的热发动机
    • US20110314805A1
    • 2011-12-29
    • US13255468
    • 2010-03-12
    • Joseph B. SealeGary Bergstrom
    • Joseph B. SealeGary Bergstrom
    • F02G1/05F02G1/053
    • F02G1/0435F01K17/06F01K19/10
    • A Stirling-like system incorporating a heater, a displacer and a regenerator is intermittently coupled to an external system via valves, providing pneumatic power while ridding waste heat. The external system is commonly a Rankine cycle, sharing the working fluid of the Stirling-like system, and can be used for heat pumping, distillation and drying. The Stirling working fluid and the Rankine working fluid are the same material and are exchanged between the two systems. A dual Stirling-like system mates a heat engine with a heat pump, sharing the same pressure-containment, with the dual system intermittently coupled to external environments for convective exchange of heat and cold.
    • 包含加热器,置换器和再生器的斯特林式系统通过阀间歇地耦合到外部系统,在消除废热的同时提供气动功率。 外部系统通常是兰金循环,共享斯特林式系统的工作流体,可用于热泵,蒸馏和干燥。 斯特林工作流体和兰金工作流体是相同的材料,并在两个系统之间交换。 双重斯特林式系统将热力发动机与热泵相配合,共享相同的压力容纳,双重系统间歇地耦合到外部环境,用于对流换热和冷热。
    • 5. 发明授权
    • Signal correction for electrical gain control systems
    • 电增益控制系统的信号校正
    • US4234804A
    • 1980-11-18
    • US943859
    • 1978-09-19
    • Gary Bergstrom
    • Gary Bergstrom
    • G06G7/24H03G1/00G06G7/12
    • G06G7/24H03G1/0005
    • The present invention relates to an electrical gain control system which provides a first signal logarithmically related to an input signal, sums a gain control signal with the first signal; and then provides an output signal which is an antilogarithmic function of the sum of the gain control signal and first signal. In accordance with the present invention in order to at least partially compensate for errors in the output signal arising from inherent characteristics of the components of the system, the system is improved by comparing the input signal and the output signal; generating an error correction signal in response to the comparison as a function of the errors in the output signal; and summing the error correction signal with the first signal and the gain control signal so as to reduce the error in the output signal.
    • 本发明涉及一种电增益控制系统,其提供与输入信号对数相关的第一信号,将增益控制信号与第一信号相加; 然后提供作为增益控制信号和第一信号之和的反对数函数的输出信号。 根据本发明,为了至少部分地补偿由系统的部件的固有特性引起的输出信号中的错误,通过比较输入信号和输出信号来改善系统; 响应于作为输出信号中的误差的函数的比较产生纠错信号; 并且利用第一信号和增益控制信号对误差校正信号求和,以便减小输出信号中的误差。