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    • 2. 发明授权
    • Bi-modal DC motor control for a motor driven anti-lock brake system
    • 用于电机驱动的防抱死制动系统的双模直流电机控制
    • US4997237A
    • 1991-03-05
    • US410781
    • 1989-09-22
    • Dennis J. RickerRichard L. FosterJack W. Savage
    • Dennis J. RickerRichard L. FosterJack W. Savage
    • B60T8/42B60T13/68B60T13/74H02P7/00
    • B60T13/745B60T13/686B60T8/4266H02P7/04Y02T10/7258
    • Differential performance characteristics are achieved in a motor-driven anti-lock braking system with a DC motor having a first brush which is employed for both forward and reverse motor rotation, a second brush which is employed in connection with the first brush when forward motor rotation is desired, and a third brush which is employed in connection with the first brush when reverse motor rotation is desired. The second and third brushes are displaced along the circumference of the motor commutator such that the first and second brushes encompass more turns of the rotor winding than the first and third brushes. As a result, more of the winding turns are active in the forward direction, and the motor torque is maximized for developing the required brake pressure. On the other hand, fewer of the winding turns are active in the reverse direction, and the motor speed is maximized to relatively quickly retract the armature within the valve bore to relieve the brake pressure.
    • 在电机驱动的防抱死制动系统中实现了差动性能特征,其中DC电动机具有用于正向和反向电动机旋转的第一电刷,第二电刷与正向电动机转动时的第一电刷结合使用 需要与需要反向电动机旋转时与第一电刷连接使用的第三电刷。 第二和第三电刷沿着电动机换向器的圆周移位,使得第一和第二电刷包含比第一和第三电刷多的转子绕组匝数。 结果,更多的绕组匝在正向方向上是有效的,并且马达转矩最大化以产生所需的制动压力。 另一方面,较少的绕组匝在相反方向上有效,并且电动机速度最大化以相对快速地缩回阀孔内的电枢以减轻制动压力。
    • 5. 发明授权
    • Bimodal controller for a multi-phase brushless DC motor
    • 用于多相无刷直流电机的双模式控制器
    • US4926099A
    • 1990-05-15
    • US334417
    • 1989-04-07
    • Dennis J. RickerRichard L. Foster
    • Dennis J. RickerRichard L. Foster
    • H02P6/08
    • H02P6/085
    • A controller for a multi-phase brushless DC motor which is selectively operable in either full wave or half wave modes for maximizing either the output torque or output speed, respectively, of the motor. One terminal of each phase winding is connected to the terminals of a DC voltage source via upper and lower legs of a full wave bridge circuit, while the other winding terminals are mutually connected to a common terminal which is selectively isolated from or returned to a terminal of the source. When relatively high motor output torque is required to drive a relatively heavy load, the winding common terminal is isolated from the source and the bridge circuit is operated in the full wave mode to energize the motor windings with bidirectional current. When load to be driven is relatively light and higher motor speed is desired, the winding common terminal is connected to a terminal of the source and the bridge circuit is operated in the half wave mode to energize the motor windings with unidirectional current.
    • 一种用于多相无刷直流电动机的控制器,其可选择性地以全波或半波模式操作,以分别使电动机的输出转矩或输出速度最大化。 每个相绕组的一个端子通过全波桥电路的上腿和下腿连接到直流电压源的端子,而其他绕组端子相互连接到与端子选择性隔离或返回到端子的公共端子 的来源。 当需要相对较高的电动机输出转矩来驱动相对较重的负载时,绕组公共端与源隔离,并且桥式电路以全波模式工作,以双向电流为电机绕组供电。 当要驱动的负载相对较轻且需要较高的电机速度时,绕组公共端子连接到源极的端子,桥式电路以半波模式工作,以单向电流为电机绕组供电。
    • 6. 发明授权
    • Waist belt rigid frame equipment support harness
    • 腰带刚性框架设备支撑线束
    • US08536433B1
    • 2013-09-17
    • US13072406
    • 2011-03-25
    • Richard L. Foster
    • Richard L. Foster
    • G10D3/00
    • G10G5/005
    • The present invention describes a harness apparatus for supporting objects, specifically stringed musical instruments, such as guitars, that allows the weight of the object to be borne by the hips and waist of the wearer and not the wearer's back, shoulders, and/or neck. The apparatus possesses a shapeable, padded rigid frame component that is associated with and rises from a padded waist belt component. The apparatus is profoundly adjustable and can be used by males, females, left-handed and right-handed persons. Advantages to an apparatus such as this include a reduction in back, shoulder, and/or neck strain, discomfort and fatigue that is normally associated with load supporting devices that bear the load's weight from the wearer's upper body. An equipment strap support loop is located on top of the inverted T frame. This support loop functions to replace the human neck and shoulders to support the equipment support strap.
    • 本发明描述了一种用于支撑物体(特别是弦乐器,例如吉他)的线束装置,其允许物体的重量由佩戴者的臀部和腰部承载,而不是佩戴者的背部,肩部和/或颈部 。 该装置具有与填充的腰带部件相关联并且从衬垫的腰带部件起升的可成形的,填充的刚性框架部件。 该仪器具有极高的可调性,可由男性,女性,左撇子和右撇子使用。 诸如此类的装置的优点包括通常与负载支撑装置相关联的背部,肩部和/或颈部应变,不适和疲劳的减少,负载支撑装置承载来自佩戴者上身的负载重量。 设备带支撑环位于倒置的T框架的顶部。 该支撑环可用于替代人的颈部和肩部以支撑设备支撑带。