Ergonomic elevated keyboard
    32.
    发明申请
    Ergonomic elevated keyboard 失效
    符合人体工学的高架键盘

    公开(公告)号:US20130271374A1

    公开(公告)日:2013-10-17

    申请号:US13506408

    申请日:2012-04-17

    CPC classification number: G06F3/0208

    Abstract: An ergonomic, elevated keyboard includes: (a) a typing keyboard including upper level keys; (b) at least one substantially vertical support leg, a top edge of the support leg being attached to a lower surface of the keyboard, the support leg either elevating a front side of the keyboard substantially above a level of an opposite, rear side of the keyboard, forming a negative keyboard slope, or holding the keyboard in a raised, substantially horizontal position, the support leg forming a lower level under the keyboard, with a central, lower level space open to the front of the keyboard; and (c) at least one thumb key on the support leg on the lower level, the thumb key being absent from among the upper level keyboard keys. This simplified abstract is not intended to limit, and should not be interpreted as limiting, the scope of the claims.

    Abstract translation: 符合人体工程学的高架键盘包括:(a)包括高级键的打字键盘; (b)至少一个基本垂直的支撑腿,所述支撑腿的顶部边缘附接到所述键盘的下表面,所述支撑腿将所述键盘的前侧基本上升到相对的后侧的水平面 键盘,形成负的键盘斜面,或者将键盘保持在升高的基本上水平的位置,支撑腿在键盘下方形成较低的水平面,其中央的较低的空间向键盘的前部开口; 和(c)下层的支撑腿上的至少一个拇指键,上层键盘键中不存在拇指键。 该简化摘要不旨在限制并且不应被解释为限制权利要求的范围。

    System and method for fast start-up of an induction motor
    34.
    发明授权
    System and method for fast start-up of an induction motor 有权
    感应电动机快速启动的系统和方法

    公开(公告)号:US08421397B2

    公开(公告)日:2013-04-16

    申请号:US13083849

    申请日:2011-04-11

    CPC classification number: H02P1/28 H02P29/032

    Abstract: A system for controlling operation of a motor drive during fast start-up of an induction motor is disclosed. The system includes an AC motor drive having a PWM inverter and a control system to generate a command signal to cause the PWM inverter to control an output of the AC motor drive. The control system includes a start-up modulator that is selectively operable during start-up acceleration of the AC motor, the start-up modulator programmed to determine a motor current applied to the AC motor and a voltage of a DC bus, generate a first frequency offset that causes a frequency reference of the command signal to be decreased when the motor current is greater than a reference current threshold, and generate a second frequency offset that causes the frequency reference of the command signal to be increased when the DC bus voltage is greater than a reference voltage threshold.

    Abstract translation: 公开了一种用于在感应电动机的快速启动期间控制电动机驱动器的操作的系统。 该系统包括具有PWM逆变器的AC电动机驱动器和用于产生指令信号以使PWM逆变器控制AC电动机驱动器的输出的控制系统。 控制系统包括启动调制器,其可在AC电动机的启动加速期间选择性地工作,所述启动调制器被编程以确定施加到AC电动机的电动机电流和DC总线的电压,产生第一 当电动机电流大于参考电流阈值时,导致指令信号的频率参考值减小的频率偏移,并且产生第二频率偏移,当DC总线电压为DC时,使得命令信号的频率参考值增加 大于参考电压阈值。

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