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    • 2. 发明授权
    • Load-based control of an AC motor
    • 交流电机的基于负载的控制
    • US4987351A
    • 1991-01-22
    • US464056
    • 1990-01-11
    • Robert J. DisserJeff A. FoustRichard N. LehnhoffDonald E. GrahamBruce A. Heaston
    • Robert J. DisserJeff A. FoustRichard N. LehnhoffDonald E. GrahamBruce A. Heaston
    • G05B23/02H02P5/46H02P23/00H02P27/08
    • H02P27/08H02P23/0077
    • An AC motor control based on an iterative computation of the motor load and method of accurately determining motor load. At the initiation of motor operation, the load term (%LOAD) is initialized to zero, and the motor is energized in accordance with a predetermined voltage and frequency schedule for producing motor rotation. During the starting interval the power loss term LOSSES and the load term (%LOAD) are iteratively computed as a function of the input voltage and current (V.sub.bus, I.sub.bus) and the motor inverter frequency (IF). When a predetermined motor speed has been achieved, the run mode is initiated. At this point, the load is known based on the iterative load calculations performed during starting, and the motor voltage and inverter frequency are scheduled as a function of motor speed and load. The iterative computation of losses and load continue during the run mode so that changes in the motor load are taken into account.
    • 基于电机负载的迭代计算的交流电动机控制和精确确定电动机负载的方法。 在电机运行开始时,负载项(%LOAD)被初始化为零,并且电动机根据用于产生电动机旋转的预定电压和频率调度被激励。 在起动间隔期间,功率损耗项LOSSES和负载项(%LOAD)根据输入电压和电流(Vbus,Ibus)和电机逆变器频率(IF)的函数进行迭代计算。 当达到预定的电动机速度时,启动运行模式。 此时,负载根据启动期间的迭代负载计算而得知,电动机电压和逆变器频率作为电机转速和负载的函数进行调度。 损耗和负载的迭代计算在运行模式下继续运行,从而考虑到电机负载的变化。
    • 7. 发明授权
    • Power latch circuit for computer self deactivation
    • 用于计算机自动停用的电源锁存电路
    • US4685023A
    • 1987-08-04
    • US930519
    • 1986-11-14
    • Bruce A. Heaston
    • Bruce A. Heaston
    • F02D41/26G06F1/26H02H3/24
    • F02D41/266G06F1/26
    • A power latch circuit uses first and second bipolar transistors responsive to an actuate voltage to latch into a conductive state with power supplied to a computer and a third bipolar transistor powered by the latch circuit and responsive to a deactivate voltage from the computer to place the first and second transistors in a deactivated state to remove power from the computer and itself. It further uses an FET in parallel with the third bipolar transistor and activated directly from the DC power supply when the second transistor is deactivated to latch the first and second transistors in the deactivated state in spite of voltage fluctuations on the deactivate line which might otherwise cause the latch circuit to reactivate. As an FET, it uses little current through its gate compared to alternative bipolar devices while the latch circuit is deactivated.
    • 电源锁存电路使用响应于致动电压的第一和第二双极晶体管,其锁存到导通状态,电源被提供给计算机,第三双极晶体管由锁存电路驱动,并响应来自计算机的去激活电压以将第一 和处于去激活状态的第二晶体管,以从计算机及其本身移除功率。 它进一步使用与第三双极晶体管并联的FET,并且当第二晶体管被去激活时,直接从DC电源激活,尽管在去激活线上的电压波动,但是第一和第二晶体管处于去激活状态,否则可能导致 锁存电路重新激活。 作为FET,与替代的双极型器件相比,其门极少使用电流,而锁存电路被去激活。