System and method for variable speed operation of a screw compressor
    2.
    发明申请
    System and method for variable speed operation of a screw compressor 有权
    螺杆压缩机变速运行的系统和方法

    公开(公告)号:US20050188708A1

    公开(公告)日:2005-09-01

    申请号:US10788723

    申请日:2004-02-27

    摘要: A system and method are provided for variable speed operation of a screw compressor to obtain increased capacity and efficiency. The screw compressor is connected to an induction motor driven by a variable speed drive, wherein the screw compressor has a variable output capacity that is dependent on the output speed of the motor. To obtain increased capacity and efficiency, the screw compressor is operated at a speed greater than the screw compressor's rated speed and does not include a slide valve. The maximum operating speed of the screw compressor, which speed is greater than the rated speed, is related to the maximum operating speed of the motor when operated at a voltage and frequency provided by the variable speed drive that is greater than the motor's rated voltage and frequency in a constant flux or constant volts/Hz mode.

    摘要翻译: 提供了一种用于螺杆压缩机的可变速度操作以获得增加的容量和效率的系统和方法。 螺杆压缩机连接到由变速驱动器驱动的感应电动机,其中螺杆式压缩机具有取决于电动机的输出速度的可变输出容量。 为了获得更高的容量和效率,螺杆式压缩机的运行速度大于螺杆压缩机的额定转速,不包括滑阀。 螺杆式压缩机的最大运行速度,其速度大于额定转速,与在变频驱动器提供的电压和频率大于电机额定电压的情况下运行时电机的最大运行速度有关, 频率处于恒定通量或恒定电压/ Hz模式。

    System and method for increasing output horsepower and efficiency in a motor
    4.
    发明申请
    System and method for increasing output horsepower and efficiency in a motor 有权
    提高电机功率和效率的系统和方法

    公开(公告)号:US20050189904A1

    公开(公告)日:2005-09-01

    申请号:US10789632

    申请日:2004-02-27

    IPC分类号: H02M5/458 H02P27/04 H02P7/36

    CPC分类号: H02P27/04

    摘要: A system and method are provided to increase the horsepower of an induction motor. One technique for increasing the horsepower of a motor is to connect the motor to a variable speed drive that is providing an output voltage and frequency greater than the standard line voltage and frequency. The connection of the variable speed drive to the induction motor enables the motor to be operated in constant flux or constant volts/Hz mode and provide a greater output horsepower. Another technique for increasing the horsepower of a motor is to use a dual voltage motor configured for lower voltage operation and then provide the motor with the corresponding voltage and frequency for higher voltage operation. The higher voltage and higher frequency can be provided by a variable speed drive with or without voltage boost. A variable speed drive without voltage boost, but with frequency boost, can be used in situations where the standard main voltage is greater than the lower voltage rating.

    摘要翻译: 提供了一种提高感应电动机的功率的系统和方法。 增加电动机功率的一种技术是将电动机连接到变速驱动器,该驱动器提供大于标准线路电压和频率的输出电压和频率。 变频驱动器与感应电动机的连接使电动机能够以恒定的通量或恒定的电压/ Hz模式工作,并提供更大的输出功率。 提高马达功率的另一种技术是使用配置为低电压运行的双电压马达,然后为电机提供相应的电压和频率以实现更高的电压运行。 可以通过具有或不具有升压的变速驱动器来提供较高的电压和更高的频率。 在标准主电压大于较低额定电压的情况下,可以使用无升压电压但频率提升的变频驱动器。