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114 条记录 (耗时 0.017 秒)

    High efficiency drive circuit for an active magnetic bearing system
    2.
    发明授权
    High efficiency drive circuit for an active magnetic bearing system 失效
    一种主动磁轴承系统的高效驱动电路

    公开(公告)号：US5627421A

    公开(公告)日：1997-05-06

    申请号：US331306

    申请日：1994-10-28

    申请人： Lance F. Miller ,  Kenneth J. Eakman

    发明人： Lance F. Miller ,  Kenneth J. Eakman

    IPC分类号： F16C32/04 ,  F16C39/06 ,  H02K7/09

    CPC分类号： F16C32/0455 ,  F16C32/0457 ,  F16C32/0489

    摘要： A plurality of electromagnetics in an array surround a shaft, with current controlled in the coils of the electromagnets to support the shaft at a desired position approximately centered between the electromagnets. Shaft position sensors provide feedback to a control system for modulating the current to the electromagnet coils, which are arranged in pairs on opposite sides of the shaft. A drive circuit for each coil includes first and second switching transistors which connect the coil to the power supply to transfer a current pulse to the coil. A pair of circulating diodes begin conducting when the transistors turn off, and return power to the supply. A control circuit for the drive circuits interleaves on and off intervals for the coils in the electromagnet pairs so that one coil of the pair is being switched off at about the same time as the other coil of the pair is being switched on. The result is that the energy being returned to the power supply by the off-turning coil is diverted, at least in part, to the on-turning coil, thereby to reduce net current drain from the power supply.

    摘要翻译： 阵列中的多个电磁学围绕轴，其中电流被控制在电磁体的线圈中，以将轴支撑在大致中心在电磁体之间的期望位置。 轴位置传感器向控制系统提供反馈，用于调制电磁线圈的电流，电磁线圈成对地布置在轴的相对侧上。 每个线圈的驱动电路包括将线圈连接到电源以将电流脉冲传送到线圈的第一和第二开关晶体管。 当晶体管关断时，一对循环二极管开始导通，并将电源返回到电源。 用于驱动电路的控制电路对电磁对中的线圈进行隔离和隔开交替，使得该对中的一个线圈在与该对的另一个线圈接通时大致同时被切断。 结果是，由偏转线圈返回到电源的能量至少部分地转向转向线圈，从而减少了电源的净电流消耗。

    Floating fluid-operated actuator
    4.
    发明授权
    Floating fluid-operated actuator 失效
    浮动流体操作执行器

    公开(公告)号：US5107678A

    公开(公告)日：1992-04-28

    申请号：US702640

    申请日：1991-05-17

    申请人： Eugene R. Jornod ,  Lary L. Field ,  Gerald R. Parsons

    发明人： Eugene R. Jornod ,  Lary L. Field ,  Gerald R. Parsons

    IPC分类号： F15B15/14 ,  F01L25/08 ,  F15B15/18 ,  F16K31/06

    CPC分类号： F15B15/18 ,  F01L25/08

    摘要： The piston of a reciprocating hydraulic actuator carries a pump which is driven by an electric motor and which supplies oil from the low pressure chamber of a cylinder to the high pressure chamber thereof in order to advance the piston. An exhaust valve in the piston is normally held in a closed position by magnetic force created by energizing a coil and, when closed, enables pressurization of the high pressure chamber of the cylinder. When a second coil is energized, the magnetic field of the first coil is negated and the valve is opened by a spring to permit oil to exhaust from the high pressure chamber to the low pressure chamber and permit a second spring to retract the piston. If both the pump motor and the second coil are de-energized, the first coil keeps the valve closed and causes the piston to remain in a commanded position. The actuator may be controlled by a floating single pole, double throw switch and its piston is automatically shifted to its fully retracted position by the second spring if electrical power to the actuator is lost.

    Oxygen sensing probe having improved sensor tip and tip-supporting tube
    5.
    发明授权
    Oxygen sensing probe having improved sensor tip and tip-supporting tube 失效
    氧传感探头具有改进的传感器尖端和尖端支撑管

    公开(公告)号：US4944861A

    公开(公告)日：1990-07-31

    申请号：US332052

    申请日：1989-04-03

    申请人： Eric J. Reber

    发明人： Eric J. Reber

    IPC分类号： G01N27/407 ,  G01N27/417

    CPC分类号： G01N27/407 ,  G01N27/4078

    摘要： An oxygen sensing probe of the type in which a sensor tip made of a solid electrolyte is secured within a supporting tube by an hermetic seal. The tip is made of yttria-stabilized zirconia; the tube is made of magnesium-aluminate spinel, calcia and zirconia; and the tip and the tube are bonded together by a fusion weld consisting of a eutectic mixture of the tip material and the tube material. The coefficient of thermal expansion of the tube material very closely matches that of the tip material so as to prevent the seal from cracking when the probe is cycled rapidly and repeatedly through a wide temperature range. A frustoconical shoulder on the sensor tip engages a slotted frustoconical seat within a tubular outer conductor to establish good electrical contact between the tip and the electrode while allowing gas to circulate freely past the tip.

    摘要翻译： 其中由固体电解质制成的传感器尖端通过气密密封固定在支撑管内的氧传感探针。 尖端由氧化钇稳定的氧化锆制成; 该管由铝酸镁尖晶石，氧化钙和氧化锆制成; 并且通过由尖端材料和管材料的共晶混合物组成的熔焊将顶端和管接合在一起。 管材的热膨胀系数与尖端材料的热膨胀系数非常接近，以便当探头在宽温度范围内快速重复循环时，防止密封件破裂。 传感器尖端上的截头圆锥肩部与管状外部导体内的开槽的截头圆锥形座接合，以在尖端和电极之间建立良好的电接触，同时允许气体自由地循环通过尖端。

    Versatile interface means for computer-based control systems
    6.
    发明授权
    Versatile interface means for computer-based control systems 失效
    用于基于计算机的控制系统的通用接口

    公开(公告)号：US4872213A

    公开(公告)日：1989-10-03

    申请号：US175865

    申请日：1988-03-31

    申请人： Mark D. Sebald ,  Richard E. Neumeyer

    发明人： Mark D. Sebald ,  Richard E. Neumeyer

    IPC分类号： G06F3/05 ,  G05B15/02 ,  G05B19/042 ,  G05D23/24

    CPC分类号： G05B19/0423 ,  G05B15/02 ,  G05D23/1917 ,  G05D23/24

    摘要： A computer implemented control system which includes interface circuitry by which signal intelligence is taken in to the computer from external devices such as sensors and is fed out from the computer to external devices such as actuators which correctively adjust controlled parameters. An interface circuit for each of the several external devices is made "universal" in that either an analog input, bistate input, analog output, or bistate output device may be connected to any given one of the terminal points. A voltage follower amplifier sends the intelligence signal to an output device through a low-cost diode, with negative feedback taken from the downstream side of the diode. When an input device is elected for a given terminal point, simple program editing assures that the diode will be reverse biased to isolate the amplifier from the input signal path. In addition, inaccuracies in the analog output voltage fed to an output device--arising from contact resistances in a separable connector--are drastically reduced by a dual-path separable connector arrangement which provides two independent circuit connections for the output voltage and for negative feedback.

    Method and apparatus for setting analog command signals by change signals of variable duration
    7.
    发明授权
    Method and apparatus for setting analog command signals by change signals of variable duration 失效
    通过可变持续时间的变化信号设置模拟指令信号的方法和装置

    公开(公告)号：US4724516A

    公开(公告)日：1988-02-09

    申请号：US810402

    申请日：1985-12-18

    申请人： Donald W. Day ,  John C. Wetter ,  Paul H. Brace ,  Lary L. Fields

    发明人： Donald W. Day ,  John C. Wetter ,  Paul H. Brace ,  Lary L. Fields

    IPC分类号： G05B11/28 ,  G06F15/46

    CPC分类号： G05B11/28

    摘要： Method and apparatus by which continuously existing analog voltage command signals for various channels within a control system are changed by determined amounts and senses as a result of supplying "pulse" signals of different durations and polarities. Electronic integrators preferably operating to create linear slope changes in their outputs, and to hold their outputs steady absent any input, are receptive to the change signals ("pulses") of differing durations to create analog command signals which change by increments proportional to the time duration and in a direction corresponding to the polarity of the change signal. This permits computer control of servo devices requiring continuously-existing, changeable command signals in the same fashion as servo devices which respond directly to variable duration, pulse-type change signals.

    摘要翻译： 作为提供不同持续时间和极性的“脉冲”信号的结果，由控制系统内的各种通道的连续存在的模拟电压指令信号改变确定量和感测的方法和装置。 电子积分器优选地操作以在其输出中产生线性斜率变化，并且在没有任何输入的情况下稳定地保持其输出，可接受不同持续时间的变化信号（“脉冲”），以产生模拟命令信号，该模拟命令信号与时间成比例地变化 持续时间和与改变信号的极性相对应的方向。 这允许计算机控制需要连续存在的可变命令信号的伺服装置，其方式与直接响应可变持续时间的脉冲型改变信号的伺服装置相同。

    Shaper cutter with replaceable cutting wafer
    8.
    发明授权
    Shaper cutter with replaceable cutting wafer 失效
    成型刀具可更换切割片

    公开(公告)号：US4673317A

    公开(公告)日：1987-06-16

    申请号：US827648

    申请日：1986-02-10

    申请人： Edward W. Haug

    发明人： Edward W. Haug

    IPC分类号： B23F21/10 ,  B23F21/28

    CPC分类号： B23F21/106 ,  Y10S76/06 ,  Y10T407/174

    摘要： A shaper cutter includes a conical body having teeth formed around its periphery and further includes a thin wafer disposed against the face of the body and formed with peripheral cutting teeth which lie against the teeth of the body, the teeth of the wafer serving to cut a workpiece and being backed by the teeth of the body. The wafer is bonded to the face of the body by a high strength adhesive which may be heated to destroy the bond and enable removal and replacement of the wafer when the cutting teeth thereof become worn. As a result of bonding the wafer directly to the body, there are no clamps creating axial interference ahead of the wafer and, in addition, lateral deflection of the wafer teeth during cutting is reduced.

    摘要翻译： 成形器切割器包括具有形成在其周边周围的齿的圆锥体，并且还包括薄片，该薄片贴靠在主体的表面上，并且形成有位于本体的齿的周边切割齿，晶片的齿用于切割 工件并由身体的齿支撑。 晶片通过高强度粘合剂结合到主体的表面，该高强度粘合剂可被加热以破坏结合，并且当切割齿磨损时能够移除和替换晶片。 作为将晶片直接接合到主体的结果，没有在晶片之前产生轴向干涉的夹具，此外，切割期间晶片齿的横向偏转减小。

    Reset controller with improved air flow span adjustment
    10.
    发明授权
    Reset controller with improved air flow span adjustment 失效
    复位控制器，改善气流量程调整

    公开(公告)号：US4413776A

    公开(公告)日：1983-11-08

    申请号：US330705

    申请日：1981-12-14

    申请人： George C. Boyer

    发明人： George C. Boyer

    IPC分类号： F24F11/75 ,  G05D23/185 ,  F24F13/10

    CPC分类号： F24F11/047 ,  G05D23/185 ,  Y10T137/7759 ,  Y10T74/206

    摘要： A controller for a damper maintains a substantially constant volumetric rate of flow of air through a duct into a controlled space for a given condition in the space and resets the rate of flow as a function of at least one sensed condition which causes changes in a control pressure. A dual lever system enables the controller to be calibrated to establish various air flow spans while utilizing substantially the full available range of control pressure to effect a change in air flow within each selected span.

    摘要翻译： 用于阻尼器的控制器将空气的空气流量通过管道保持在空间中用于空间中的给定条件的受控空间中，并且将作为至少一个感测到的条件的函数的流速重新设置，这导致控制的变化 压力。 双杠杆系统使得控制器能够被校准以建立各种气流跨度，同时基本上充分利用可用的控制压力范围来实现每个选定跨度内的气流变化。