Polyphase inverter, control method thereof, air sending device and polyphase current output system
    11.
    发明授权
    Polyphase inverter, control method thereof, air sending device and polyphase current output system 有权
    多相逆变器,其控制方法,送风装置和多相电流输出系统

    公开(公告)号:US07684217B2

    公开(公告)日:2010-03-23

    申请号:US11988552

    申请日:2006-05-16

    IPC分类号: H02M5/45 H02M5/458

    CPC分类号: H02M1/32 H02M7/5387

    摘要: Capacitors act as bootstrap capacitors of a high side control circuits. The capacitors are charged in a period in which all of high arm switching devices are non-conductive, so-called in a precharge period. When any of U-phase current, V-phase current and W-phase current is smaller than a negative predetermined value (when an absolute value is larger), it is judged which is the largest value. The low arm switching device is turned on only for a phase corresponding to the current of the largest value and the low arm switching devices of other phases are turned off.

    摘要翻译: 电容器用作高端控制电路的自举电容器。 电容器在所有高臂开关器件都不导电的时段内被充电,所谓的预充电期间。 当U相电流,V相电流和W相电流中的任何一个小于负的预定值(当绝对值较大时),判断哪个是最大值。 低臂开关装置仅在对应于最大值的电流的相位时导通,并且其它相的低臂开关装置关闭。

    ENGINE LIFE PREDICTING APPARATUS AND REFRIGERATING APPARATUS
    12.
    发明申请
    ENGINE LIFE PREDICTING APPARATUS AND REFRIGERATING APPARATUS 有权
    发动机寿命预测装置和制冷装置

    公开(公告)号:US20100058785A1

    公开(公告)日:2010-03-11

    申请号:US12513027

    申请日:2007-11-01

    IPC分类号: F25B49/00 G01R19/00 G06F17/18

    摘要: A current detector and a voltage detector respectively detect a current value and a voltage value outputted from an engine generator. An operating block determines a weight constant on the basis of the current value and the voltage value, weights the operating time of an engine by using the weight constant, and integrates the weighted operating time to calculate an integral time. A judging block compares the integral time and a reference time, and gives a notification to an indicator when it judges that the integral time exceeds the reference time. Receiving the notification, the indicator makes an external indication. The current detector and the voltage detector can be made of electric circuitry, so that the life of the engine can be predicted at low costs and with high reliability.

    摘要翻译: 电流检测器和电压检测器分别检测从发动机发电机输出的电流值和电压值。 操作块基于当前值和电压值确定重量常数,通过使用重量常数对发动机的运行时间进行加权,并且对加权操作时间进行积分以计算积分时间。 判断块比较积分时间和参考时间,并且当判定积分时间超过参考时间时,向指示符通知。 接收通知后,指示灯进行外部指示。 电流检测器和电压检测器可以由电路制成,从而可以以低成本和高可靠性预测发动机的使用寿命。

    Method and device for controlling temperature rise of autonomous inverter-driven hydraulic unit
    14.
    发明申请
    Method and device for controlling temperature rise of autonomous inverter-driven hydraulic unit 失效
    控制自主变频驱动液压单元升温的方法和装置

    公开(公告)号:US20060150621A1

    公开(公告)日:2006-07-13

    申请号:US10534698

    申请日:2003-11-17

    IPC分类号: F16D31/00

    摘要: An apparatus for warm up control of an autonomous inverter-driven hydraulic unit has a warm up control section and a switch section. The warm up control section performs a predetermined process using a current speed and current pressure as input information and outputs a first switch command. The switch section is controlled by the first switch command so as to control on/off of power supplied to a fan motor. The apparatus causes an oil temperature to quickly rise to a level where a hydraulic unit driven by a hydraulic pump can work in an optimum condition.

    摘要翻译: 自动逆变驱动液压单元的预热控制装置具有预热控制部和开关部。 预热控制部使用当前速度和当前压力作为输入信息执行预定处理,并输出第一切换命令。 开关部由第一开关指令控制,以控制供给风扇马达的电力的开/关。 该装置使得油温快速上升至由液压泵驱动的液压单元能够在最佳状态下工作的水平。