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公开(公告)号：US07164242B2
公开(公告)日：2007-01-16
申请号：US10788994
申请日：2004-02-27
CPC分类号： H02M5/458 , F25B49/025 , F25B2400/06 , F25B2500/06 , F25B2600/021 , H02M7/493 , H02M2001/0077 , Y02B30/741
摘要： A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters, wherein each inverter is configured to convert a DC voltage to an AC voltage to power a corresponding load connected to the inverter The converter is electrically connected to an AC power source, the DC link is electrically connected to the converter, and the plurality of inverters are electrically connected in parallel to the DC link. Each inverter of the plurality of inverters is configured to operate substantially independently of other inverters of the plurality of inverters.
摘要翻译： 提供了一种变速驱动器，其具有将AC电压转换为DC电压的转换器，用于对来自转换器的能量进行滤波和存储的DC链路以及多个逆变器，其中每个反相器被配置为将DC电压转换为AC 为连接到逆变器的相应负载供电的电压器。转换器电连接到AC电源，DC链路电连接到转换器，并且多个逆变器与DC链路并联电连接。 多个逆变器中的每个逆变器被配置为基本上独立于多个逆变器中的其它反相器进行操作。
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12.发明授权公开(公告)号：US07075268B2
公开(公告)日：2006-07-11
申请号：US10789632
申请日：2004-02-27
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电机，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。 具有或不具有升压的变速驱动器可以提供更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。
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公开(公告)号：US07387498B2
公开(公告)日：2008-06-17
申请号：US10728157
申请日：2003-12-04
CPC分类号： F04C28/02 , F04B39/0027 , F04B41/06 , F04B49/065 , F04C18/16 , F04C28/08 , F04C29/061 , F04C29/068 , F04C2270/05
摘要： A system is provided for attenuating noise in at least two positive displacement compressors proximately located from each other for use with at least one heating or cooling system. A lead compressor and a lag compressor have a selectably controllable rotational speed and a selectably controllable phase of operation. A controller selectably controls the rotational speed and the phase of operation of each of the compressors. The controller controls the rotational speed of the compressors at a predetermined rotational speed that is substantially the same for each of the compressors. The controller controls the phase of operation of the compressors by shifting the phase of operation of the lag compressor so that an outlet pressure pulse operatively produced by the lag compressor is substantially evenly spaced between successive outlet pressure pulses operatively produced by the reference compressor.
摘要翻译： 提供了一种系统，用于衰减至少两个彼此近似定位的容积式压缩机中的噪声，以与至少一个加热或冷却系统一起使用。 引导压缩机和滞后压缩机具有可选择的可控旋转速度和可选择地可控的操作相位。 控制器可选地控制每个压缩机的转速和运行阶段。 控制器以对于每个压缩机基本上相同的预定转速来控制压缩机的转速。 控制器通过改变滞后压缩机的运行阶段来控制压缩机的运行阶段，使得由滞后压缩机可操作地产生的出口压力脉冲基本上均匀地间隔在由参考压缩机可操作地产生的连续出口压力脉冲之间。
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公开(公告)号：US07096681B2
公开(公告)日：2006-08-29
申请号：US10788723
申请日：2004-02-27
申请人： Frank Eugene Wills , Harold Robert Schnetzka , Douglas Alan Kester , John F. Judge , Mahesh Valiya-Naduvath , Israel Federman
发明人： Frank Eugene Wills , Harold Robert Schnetzka , Douglas Alan Kester , John F. Judge , Mahesh Valiya-Naduvath , Israel Federman
CPC分类号： F04C18/16 , F04C28/08 , F04C29/0085 , F25B1/047 , F25B49/025 , F25B2400/075 , F25B2400/13 , F25B2600/0253 , Y02B30/741
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。
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公开(公告)号：US07005829B2
公开(公告)日：2006-02-28
申请号：US11068999
申请日：2005-03-01
IPC分类号： H02P7/42
CPC分类号： H02M7/125 , Y02B70/1483
摘要： A variable speed drive with a converter that is controllable to precharge a DC link is provided. The variable speed drive also includes an inverter. The converter converts a fixed line frequency, fixed line voltage AC power from an AC power source into DC power. The DC link filters the DC power from the converter. Finally, the inverter is connected in parallel with the DC link and converts the DC power from the DC link into a variable frequency, variable voltage AC power. The converter includes a plurality of pairs of power switches, wherein each pair of power switches includes a reverse blocking power switch connected in anti-parallel to another reverse blocking power switch.
摘要翻译： 提供了具有可控制以对DC链路进行预充电的转换器的变速驱动器。 变频器还包括一个逆变器。 该转换器将固定线路频率，交流电源的固定线路电压AC电源转换为直流电源。 直流链路过滤掉转换器的直流电源。 最后，逆变器与直流母线并联连接，将直流母线的直流电源转换成变频，可变电压交流电源。 该转换器包括多对电力开关，其中每对功率开关包括与另一个反向阻断功率开关反并联连接的反向阻断功率开关。
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