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1. 发明申请

US20060208685A1 System for precharging a DC link in a variable speed drive 失效
公开(公告)号：US20060208685A1
公开(公告)日：2006-09-21
申请号：US11323884
申请日：2005-12-30
申请人： Harold Schnetzka
发明人： Harold Schnetzka
IPC分类号： H02P27/04
CPC分类号： H02M1/36 , H02H9/001 , H02M5/4585 , 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 arrangement connected in anti-parallel to another reverse blocking power switch arrangement. Alternatively, each pair of power switches includes a reverse blocking power switch connected in anti-parallel with a silicon carbide controlled rectifier.

2. 发明申请

US20050225270A1 System and method for controlling a variable speed drive 有权
标题翻译：用于控制变速驱动器的系统和方法
公开(公告)号：US20050225270A1
公开(公告)日：2005-10-13
申请号：US10822489
申请日：2004-04-12
申请人： Harold Schnetzka , Ivan Jadric , Scott Slothower
发明人： Harold Schnetzka , Ivan Jadric , Scott Slothower
IPC分类号： H02M5/458 , H02P5/46
CPC分类号： H02M5/4585 , H02M2001/008
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. Each inverter is configured to convert a DC voltage to an AC voltage and is electrically connected in parallel to the DC link. An interleaved pulse width modulation control technique is used to control the operation of the plurality of inverters and possibly the converter to lower the RMS ripple current in the DC link.
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。每个逆变器被配置为将DC电压转换为AC电压并且与DC链路并联电连接。使用交错脉宽调制控制技术来控制多个逆变器的操作以及可能的转换器来降低DC链路中的RMS纹波电流。

3. 发明申请

US20050189904A1 System and method for increasing output horsepower and efficiency in a motor 有权
标题翻译：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
申请人： Frank Wills , Harold Schnetzka
发明人： Frank Wills , Harold Schnetzka
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。

4. 发明申请

US20070159129A1 Variable Speed Drive for a Chiller System with a Switched Reluctance Motor 审中-公开
标题翻译：具有开关磁阻电机的冷却器系统的变速驱动
公开(公告)号：US20070159129A1
公开(公告)日：2007-07-12
申请号：US11688456
申请日：2007-03-20
申请人： Ivan Jadric , Harold Schnetzka , Stephen Smith
发明人： Ivan Jadric , Harold Schnetzka , Stephen Smith
IPC分类号： H02P1/46
CPC分类号： F25B49/025 , F25B2600/021 , H02M5/4585 , H02P25/08 , Y02B30/741
摘要： A variable speed drive with a boost converter is provided for a chiller system driven by a switched reluctance motor. The boost converter can be a diode or thyristor rectifier followed by a boost DC/DC converter or a three-phase pulse width modulated boost converter. The boost converter provides a boosted voltage to the DC link, which results in a boosted voltage being applied to the switched reluctance motor by the inverter of the variable speed drive.
摘要翻译：对于由开关磁阻电机驱动的冷却器系统，提供了带升压转换器的变速驱动器。升压转换器可以是二极管或晶闸管整流器，后面是升压型DC / DC转换器或三相脉宽调制升压转换器。升压转换器为直流链路提供升压电压，这导致由变频驱动器的逆变器施加到开关磁阻电动机的升压电压。

5. 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。

6. 发明申请

US20070108934A1 Application of a switched reluctance motion control system in a chiller system 失效
标题翻译：开关磁阻运动控制系统在冷却器系统中的应用
公开(公告)号：US20070108934A1
公开(公告)日：2007-05-17
申请号：US11273991
申请日：2005-11-15
申请人： Stephen Smith , Harold Schnetzka , Ivan Jadric
发明人： Stephen Smith , Harold Schnetzka , Ivan Jadric
IPC分类号： H02P1/46
CPC分类号： H02P25/08 , F25B31/006 , F25B49/025 , F25B2339/047 , F25B2600/021 , H02K7/14 , H02K9/12 , H02K9/19 , H02K2205/12 , Y02B30/741
摘要： A chiller system includes a switched reluctance motor for powering the compressor of the chiller system. A variable speed drive with a boost converter provides a boosted voltage to the switched reluctance motor. The switched reluctance motor and the compressor may be disposed within the same hermetic enclosure and driven by a common drive shaft. Cooling for both the variable speed drive and the switched reluctance motor is provided from condenser water in the condenser water circuit, or from an intermediate liquid cooled by water from the condenser circuit to increase system efficiency. Windage losses are reduced by barriers introduced within the motor, and by maintaining a reduced pressure in the switched reluctance motor.
摘要翻译：冷冻机系统包括用于为冷却器系统的压缩机供电的开关磁阻电动机。具有升压转换器的变速驱动器为开关磁阻电机提供升压电压。开关磁阻电机和压缩机可以设置在相同的密封外壳内并由公共的驱动轴驱动。变频驱动器和开关磁阻电机的冷却由冷凝器水回路中的冷凝器水或来自冷凝器回路的水冷却的中间液体提供，以提高系统效率。通过在电动机内引入的障碍以及通过在开关磁阻电动机中保持减小的压力来降低风阻损失。

7. 发明申请

US20060250105A1 Variable speed drive for a chiller system with a switched reluctance motor 有权
标题翻译：具有开关磁阻电机的冷却器系统的变速驱动
公开(公告)号：US20060250105A1
公开(公告)日：2006-11-09
申请号：US11123756
申请日：2005-05-06
申请人： Ivan Jadric , Harold Schnetzka , Stephen Smith
发明人： Ivan Jadric , Harold Schnetzka , Stephen Smith
IPC分类号： H02P5/28
CPC分类号： F25B49/025 , F25B2600/021 , H02M5/4585 , H02P25/08 , Y02B30/741
摘要： A variable speed drive with a boost converter is provided for a chiller system driven by a switched reluctance motor. The boost converter can be a diode or thyristor rectifier followed by a boost DC/DC converter or a three-phase pulse width modulated boost converter. The boost converter provides a boosted voltage to the DC link, which results in a boosted voltage being applied to the switched reluctance motor by the inverter of the variable speed drive.
摘要翻译：对于由开关磁阻电机驱动的冷却器系统，提供了带升压转换器的变速驱动器。升压转换器可以是二极管或晶闸管整流器，后面是升压型DC / DC转换器或三相脉宽调制升压转换器。升压转换器为直流链路提供升压电压，这导致由变频驱动器的逆变器施加到开关磁阻电动机的升压电压。

8. 发明申请

US20060196203A1 System for precharging a DC link in a variable speed drive 失效
公开(公告)号：US20060196203A1
公开(公告)日：2006-09-07
申请号：US11073830
申请日：2005-03-07
申请人： Harold Schnetzka , Ivan Jadric
发明人： Harold Schnetzka , Ivan Jadric
IPC分类号： H02M3/24 , H02M5/42 , H02M7/44 , H02M7/68 , F25B1/00 , F25B49/00
CPC分类号： H02M1/36 , F25B49/025 , F25B2600/021 , Y02B30/741 , 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. Alternatively, each pair of power switches includes a reverse blocking power switch connected in anti-parallel with a silicon carbide controlled rectifier.

9. 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。

10. 发明授权

US06686718B2 Control loop and method for variable speed drive ride-through capability improvement 失效
标题翻译：用于变速驾驶穿越能力改进的控制回路和方法
公开(公告)号：US06686718B2
公开(公告)日：2004-02-03
申请号：US09993638
申请日：2001-11-27
申请人： Ivan Jadric , Harold Schnetzka
发明人： Ivan Jadric , Harold Schnetzka
IPC分类号： H02P534
CPC分类号： H02M7/53873 , H02M5/458 , H02M2001/0022
摘要： A variable speed drive (VSD) having a rectifier, an inverter, an inverter modulator, an inverter controller, and a control loop, for controlling a motor load, wherein the control loop reduces an amount of power transferred to the inverter during a voltage sag. The control loop may include a reference generator, a filter, a regulator, and a ride-through corrective algorithm. A method for controlling a VSD to improve voltage sag ride-through by monitoring a voltage applied to the VSD, generating a control signal representative of losses in a motor load when a voltage sag is detected in the voltage applied to the VSD and applying less power to the load of the inverter.
摘要翻译：具有用于控制电动机负载的整流器，逆变器，逆变器调制器，逆变器控制器和控制回路的变速驱动器（VSD），其中控制回路减少在电压骤降期间传递到逆变器的功率量。控制回路可以包括参考发生器，滤波器，调节器和骑乘校正算法。一种用于通过监视施加到VSD的电压来控制VSD以改善电压暂降穿越的方法，当在施加到VSD的电压中检测到电压骤降并施加较小功率时，产生代表电动机负载中的损耗的控制信号到变频器的负载。

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