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11. 发明申请

US20070151272A1 Electronic control transformer using DC link voltage 审中-公开
标题翻译：电子控制变压器采用直流母线电压
公开(公告)号：US20070151272A1
公开(公告)日：2007-07-05
申请号：US11324368
申请日：2006-01-03
申请人： Muhammet Cosan , Harold Schnetzka
发明人： Muhammet Cosan , Harold Schnetzka
IPC分类号： F25B49/00 , F25B1/00
CPC分类号： F25B49/025 , F25B2600/021 , Y02B30/741
摘要： In a chiller system, an electronic control transformer is powered by the DC link of a variable speed drive that drives a compressor motor. The electronic control transformer converts the DC voltage to a constant 120 VAC at 60 Hz, for providing power to auxiliary electrical devices associated with the chiller system. The electronic transformer includes four semiconductor switches to convert the DC voltage to AC. The energy stored in the compressor motor is transferred to the DC link of the VSD during an input voltage sag. The electronic control transformer maintains the control voltage and prevents the system auxiliary loads from dropping out during a voltage sag. The chiller system is able to ride through the input voltage sag or interruption. A boost converter may be provided at the input of the VSD to increase ride through capability.
摘要翻译：在冷却器系统中，电子控制变压器由驱动压缩机电动机的变速驱动器的直流链路供电。电子控制变压器将DC电压转换为恒定的120 VAC，频率为60 Hz，为与冷却器系统相关的辅助电气设备供电。电子变压器包括四个半导体开关，用于将DC电压转换成AC。存储在压缩机电动机中的能量在输入电压骤降期间被传送到VSD的DC链路。电子控制变压器保持控制电压，防止系统辅助负载在电压骤降期间脱落。冷却器系统能够穿过输入电压骤降或中断。可以在VSD的输入处提供升压转换器以增加骑乘能力。

12. 发明申请

US20060018764A1 System and method to reduce acoustic noise in screw compressors 有权
标题翻译：减少螺杆压缩机噪声的系统和方法
公开(公告)号：US20060018764A1
公开(公告)日：2006-01-26
申请号：US10895204
申请日：2004-07-20
申请人： Harold Schnetzka , E. Eichelberger , Paul Nemit
发明人： Harold Schnetzka , E. Eichelberger , Paul Nemit
IPC分类号： F04B49/00 , F04B49/06
CPC分类号： F04C29/06 , F04C28/08
摘要： A system is provided for attenuating tonal acoustic noise associated with a single positive displacement compressor, or multiple positive displacement compressors proximately located from each other. A controller selectably controls the rotational speed and the frequency of operation of each of the compressors. The controller controls the rotational speed of the compressors about a predetermined rotational speed, in a random manner, within the pre-selected speed band to reduce the magnitude of the central tonal acoustic frequency of the pressure pulsations and disperse the sound power over a wider acoustic bandwidth.
摘要翻译：提供了一种用于衰减与单个容积式压缩机相关联的音调声学噪声的系统，或者彼此近似定位的多个容积式压缩机。控制器可选地控制每个压缩机的转速和操作频率。控制器以预定速度带内的随机方式围绕预定旋转速度控制压缩机的旋转速度，以减小压力脉动的中心音调声频的大小，并将声功率分散在较宽的声学带宽。

13. 发明申请

US20050223730A1 Electronic component cooling system for an air-cooled chiller 有权
标题翻译：用于风冷式冷水机组的电子部件冷却系统
公开(公告)号：US20050223730A1
公开(公告)日：2005-10-13
申请号：US10822460
申请日：2004-04-12
申请人： Douglas Kester , Harold Schnetzka , Mustafa Yanik , John Judge , Mahesh Valiya Naduvath , Frank Hill
发明人： Douglas Kester , Harold Schnetzka , Mustafa Yanik , John Judge , Mahesh Valiya Naduvath , Frank Hill
IPC分类号： F25B23/00 , F25B31/00 , F25B39/04 , F28D1/04 , F28D1/047 , F25D23/12 , F25D17/00 , F25D17/02
CPC分类号： F25B31/006 , F25B39/04 , F25B2600/021 , F28D1/0426 , F28D1/0477 , Y02B30/741
摘要： A chiller system includes a refrigerant loop, the refrigerant loop further including a compressor, an air-cooled condenser arrangement and an evaporator arrangement connected in a first closed refrigerant loop. A motor is connected to the compressor to drive the compressor, a drive is connected to the motor to power the motor and a power/control panel controls the refrigerant loop. The power/control panel and the condenser arrangement are connected in a second closed coolant loop. The second closed coolant loop provides cooling to the enclosure and/or components within the enclosure disposed on a chill plate. Condensation is substantially prevented from forming inside the enclosure, despite the enclosure lacking a humidity control device.
摘要翻译：冷却器系统包括制冷剂回路，制冷剂回路还包括压缩机，空气冷却冷凝器装置和连接在第一闭合制冷剂回路中的蒸发器装置。电机连接到压缩机以驱动压缩机，驱动器连接到电动机以为电动机供电，并且电源/控制面板控制制冷剂回路。电源/控制面板和冷凝器布置在第二封闭冷却剂回路中连接。第二封闭冷却剂回路为外壳和/或设置在冷却板上的外壳内的部件提供冷却。尽管外壳缺少湿度控制装置，但是基本上防止了在外壳内形成冷凝。

14. 发明申请

US20050189888A1 Variable speed drive for multiple loads 有权
标题翻译：变速驱动器用于多个负载
公开(公告)号：US20050189888A1
公开(公告)日：2005-09-01
申请号：US10788994
申请日：2004-02-27
申请人： Israel Federman , Harold Schnetzka
发明人： Israel Federman , Harold Schnetzka
IPC分类号： F25B49/02 , H02M5/458 , H02M7/48 , H02M7/493 , H02P5/46
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。

15. 发明申请

US20050188708A1 System and method for variable speed operation of a screw compressor 有权
标题翻译：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
申请人： Frank Wills , Harold Schnetzka , Douglas Kester , John Judge , Mahesh Valiya Naduvath , Israel Federman
发明人： Frank Wills , Harold Schnetzka , Douglas Kester , John Judge , Mahesh Valiya Naduvath , Israel Federman
IPC分类号： F04C18/16 , F04C28/08 , F04C29/00 , H02M5/458 , H02P27/04 , F25B7/00
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。

16. 发明申请

US20050123407A1 System and method for noise attenuation of screw compressors 失效
标题翻译：螺杆式压缩机噪声衰减系统及方法
公开(公告)号：US20050123407A1
公开(公告)日：2005-06-09
申请号：US10728157
申请日：2003-12-04
申请人： Harold Schnetzka , E. Curtis Eichelberger , Paul Nemit
发明人： Harold Schnetzka , E. Curtis Eichelberger , Paul Nemit
IPC分类号： F04B39/00 , F04B41/06 , F04B49/06 , F04C18/16 , F04C28/02 , F04C28/08 , F04C29/06 , F04B1/00
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。

17. 发明申请

US20050122752A1 System for precharging a DC link in a variable speed drive 失效
标题翻译：用于对变频驱动器中的直流母线进行预充电的系统
公开(公告)号：US20050122752A1
公开(公告)日：2005-06-09
申请号：US11068999
申请日：2005-03-01
申请人： Harold Schnetzka
发明人： Harold Schnetzka
IPC分类号： H02M7/12 , H02H7/10 , H02M3/24 , H02M5/42 , H02M7/44 , H02M7/68
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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