公开(公告)号：US4273006A

公开(公告)日：1981-06-16

申请号：US946148

申请日：1978-09-27

申请人： James R. Woodbury

发明人： James R. Woodbury

IPC分类号： B64C13/28 ,  F16H48/08 ,  F16H48/20 ,  F16H1/44 ,  F16D9/00 ,  G05G7/00

CPC分类号： B64C13/28 ,  F16H2035/103 ,  F16H2048/201 ,  F16H48/08 ,  F16H48/20 ,  Y02T50/44 ,  Y10T464/20 ,  Y10T74/20

摘要： A mechanical power transmission apparatus, of the differential gear type, for actuating an airplane control surface requiring two independent actuator inputs to a single control surface. Predetermined, proportionately variable, asymmetric loads between the two actuators are accomodated by a load sensitive brake in conjunction with a fuse link which fails in the event of single actuator or drive means failure. The fuse link is provided by employing a shear pin to attach the pinion gear in the differential to the pinion shaft. The shear pin failure strength in conjunction with the load variable brake determines the allowable differential torque between the two driven bevel gears.

摘要翻译： 用于致动飞机控制表面的差速齿轮型机械动力传动装置，其需要两个独立的致动器输入到单个控制表面。 两个致动器之间的预定的，相对不变的不对称负载由负载敏感的制动器与保险丝链节相结合，在单个致动器或驱动装置故障的情况下故障。 通过使用剪切销将差速器中的小齿轮连接到小齿轮轴来提供熔断体。 与负载可变制动器结合的剪切销失效强度决定了两个从动锥齿轮之间允许的差动转矩。

公开(公告)号：US4207510A

公开(公告)日：1980-06-10

申请号：US869953

申请日：1978-01-16

申请人： James R. Woodbury

发明人： James R. Woodbury

IPC分类号： H02P6/08 ,  H02P23/03 ,  H02P27/08 ,  H02P5/40

CPC分类号： H02P27/08 ,  H02P23/03 ,  H02P6/08 ,  H02P27/047

摘要： Method and apparatus for efficient operation of a brushless d-c motor are shown. A brushless d-c motor comprises, essentially, a motor drive source, such as a d-c to a-c converter, in combination with a conventional brushless a-c machine. Generally, the brushless a-c machine includes a polyphase stator for the production of a rotating electric field, and a rotor that produces mechanical power from the rotating field without the need for sliding electrical contacts. For induction motors, the rotor phases are short-circuited and rotor currents are produced by allowing the rotor to "slip" with respect to the rotating stator field, the resulting flux variations in the rotor thereby inducing rotor currents. Motor speed is controlled by frequency control of the a-c output from the motor drive source. The present arrangement includes an efficiency controller responsive to motor input current and voltage for producing a first signal related to motor impedance, and a second signal related to motor impedance required for maximum motor operating efficiency. The difference between said first and second impedance related signals is used to control the motor input voltage for efficient motor operation over a wide range of operating speeds and torques.

摘要翻译： 示出了用于无刷d-c电动机的有效操作的方法和装置。 无刷d-c电动机基本上包括电动机驱动源，例如d-c至a-c转换器，与传统的无刷a-c机器组合。 通常，无刷a-c机器包括用于产生旋转电场的多相定子和从旋转场产生机械动力而不需要滑动电接触的转子。 对于感应电动机，转子相是短路的，通过允许转子相对于旋转的定子磁场“转动”来产生转子电流，从而导致转子中的磁通变化从而引起转子电流。 电机速度由电机驱动源的a-c输出的频率控制控制。 本安排包括响应于电动机输入电流和电压的效率控制器，用于产生与电动机阻抗有关的第一信号，以及与最大电动机运行效率所需的电动机阻抗相关的第二信号。 所述第一和第二阻抗相关信号之间的差异用于控制电动机输入电压，以在宽范围的运行速度和转矩下有效地进行电动机运行。