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28 条记录 (耗时 0.022 秒)

    Variable speed drive
    11.
    发明申请
    Variable speed drive 有权
    变速驱动

    公开(公告)号：US20090109713A1

    公开(公告)日：2009-04-30

    申请号：US11978939

    申请日：2007-10-30

    申请人： Harold R. Schnetzka ,  Ivan Jadric ,  Shreesha Adiga Manoor ,  Steve Hoover ,  Kathleen S. Rogers ,  Mustafa Kemal Yanik

    发明人： Harold R. Schnetzka ,  Ivan Jadric ,  Shreesha Adiga Manoor ,  Steve Hoover ,  Kathleen S. Rogers ,  Mustafa Kemal Yanik

    IPC分类号： H02M5/297 ,  H05K7/20

    CPC分类号： H02M5/4585 ,  H02M7/003

    摘要： Systems and methods for improved Variable Speed Drives are provided. One embodiment relates to apparatus for common mode and differential mode filtering for motor or compressor bearing protection when operating with Variable Speed Drives, including conducted EMI/RFI input power mains mitigation. Another embodiment relates to a method to extend the synchronous operation of an Active Converter to the AC mains voltage during complete line dropout. Another embodiment relates to an Active Converter-based Variable Speed Drive system with Improved Full Speed Efficiency. Another embodiment relates to a liquid- or refrigerant-cooled inductor. The liquid- or refrigerant-cooled inductor may be used in any application where liquid or refrigerant cooling is available and a reduction in size and weight of a magnetic component is desired.

    摘要翻译： 提供了改进变频器的系统和方法。 一个实施例涉及用于在使用变速驱动器（包括传导的EMI / RFI输入电源减轻）操作时用于电机或压缩机轴承保护的共模和差模过滤的装置。 另一个实施例涉及在完整的线路断开期间将有源转换器的同步操作扩展到AC电源电压的方法。 另一实施例涉及具有改进的全速效率的基于有源转换器的变速驱动系统。 另一个实施例涉及液体或制冷剂冷却的电感器。 液体或冷却剂冷却的电感器可以用于可用液体或制冷剂冷却的任何应用中，并且期望磁性部件的尺寸和重量的减小。

    Method and apparatus for detecting a failed thyristor
    13.
    发明授权
    Method and apparatus for detecting a failed thyristor 失效
    用于检测故障晶闸管的方法和装置

    公开(公告)号：US06404346B1

    公开(公告)日：2002-06-11

    申请号：US09373501

    申请日：1999-08-13

    申请人： Ivan Jadrić ,  Harold R. Schnetzka

    发明人： Ivan Jadrić ,  Harold R. Schnetzka

    IPC分类号： G08B2100

    CPC分类号： G01R31/263 ,  G01R31/343 ,  H02H7/0844

    摘要： A method or system consistent with this invention for detecting if a thyristor failed open in an alternating current input phase of a load comprises measuring an instantaneous power delivered to the load during a cycle of the input; determining a peak power delivered to the load during the cycle of the input; calculating an average power delivered to the load during the cycle of the input; and determining if the thyristor failed open by comparing the magnitudes of the peak power and the average power.

    摘要翻译： 根据本发明的用于检测在负载的交流输入阶段中晶闸管故障是否断开的方法或系统包括测量在输入周期期间递送给负载的瞬时功率; 确定在所述输入周期期间递送给所述负载的峰值功率; 计算在输入周期期间递送给负载的平均功率; 并通过比较峰值功率和平均功率的大小来确定晶闸管是否失效。

    OPTOCOUPLER CIRCUIT FOR GATE DRIVER
    15.
    发明申请
    OPTOCOUPLER CIRCUIT FOR GATE DRIVER 有权
    门控驱动器的电路板电路

    公开(公告)号：US20120298890A1

    公开(公告)日：2012-11-29

    申请号：US13520469

    申请日：2011-01-12

    申请人： Shreesha Adiga-Manoor ,  Harold R. Schnetzka

    发明人： Shreesha Adiga-Manoor ,  Harold R. Schnetzka

    IPC分类号： G02B27/00

    CPC分类号： H03K17/16 ,  H03K17/78 ,  H04B10/802

    摘要： An optocoupler circuit includes a switch connected in parallel with a photo LED, the photo LED having an anode and a cathode. The anode is connected to a power supply via a decoupling capacitor. The optocoupler circuit is arranged so that the switch turns on the photo LED when in the open position. When closed, the switch directs current flow through a series resistor to ground and shunts current flow away from the photo LED to turn off the photo LED. A second capacitor is connected to the cathode of the photo LED. The second capacitor is wired in series with a second switch and a current limiting resistor connected to ground. The first switch and second switch operate in complementary states to prevent the cathode connected capacitor from discharging. The disclosed optocoupler circuit provides the ability to function at increased levels of common mode voltage transients.

    摘要翻译： 光耦合器电路包括与光LED平行连接的开关，该光LED具有阳极和阴极。 阳极通过去耦电容器连接到电源。 光耦合器电路布置成使得当处于打开位置时，开关接通照明LED。 闭合时，开关将电流流过串联电阻器接地，并将电流从照片LED分流，以关闭照片LED。 第二电容器连接到照明LED的阴极。 第二电容器与第二开关和限流电阻串联连接到地。 第一开关和第二开关工作在互补状态，以防止阴极连接的电容器放电。 所公开的光耦合器电路提供在增加的共模电压瞬变水平下工作的能力。

    Ride-through method and system for HVAC&R chillers
    17.
    发明授权
    Ride-through method and system for HVAC&R chillers 有权
    HVAC＆R冷水机的穿越方法和系统

    公开(公告)号：US07332885B2

    公开(公告)日：2008-02-19

    申请号：US11422668

    申请日：2006-06-07

    申请人： Harold R. Schnetzka ,  Ivan Jadric

    发明人： Harold R. Schnetzka ,  Ivan Jadric

    IPC分类号： H01R39/46 ,  H02K13/00 ,  H02P25/12

    CPC分类号： H02J9/062 ,  H02M5/458

    摘要： A method of providing ride-through capability in a chiller/refrigeration system employs a variable speed drive with an active converter stage, a DC link stage and an inverter stage for providing variable frequency and voltage to power at least one motor. An induction motor is coupled to the output of the inverter stage for driving a compressor in the chiller/refrigeration system. The ride-through method comprises operating the active converter to regulate the DC link voltage of the DC link stage to a predetermined voltage level until the current through the active converter equals a predetermined current limit, then transferring regulation of the DC link to the inverter upon reaching the current limit of the converter. The compressor is unloaded, and the power flow through the inverter is reversed to maintain the voltage level of the DC link stage. Pre-rotation vanes, slide valve, or check valve are used to unload the compressor.

    摘要翻译： 在冷冻机/制冷系统中提供穿越能力的方法采用具有有源转换器级，DC链路级和逆变器级的变速驱动器，用于提供可变频率和电压以对至少一个电动机供电。 感应电动机与变频器级的输出端连接，用于驱动冷冻机/制冷系统中的压缩机。 该直通方法包括操作有源转换器以将DC链路级的DC链路电压调节到预定的电压电平，直到通过有源转换器的电流等于预定的电流限制，然后将DC链路的调节转移到逆变器上 达到转换器的电流极限。 压缩机卸载，逆变器的功率流反转，以保持直流母线的电压电平。 预旋转叶片，滑阀或止回阀用于卸载压缩机。

    Solid state, reduced voltage motor starter enabling equalized input/output volt-amp ratings
    18.
    发明授权
    Solid state, reduced voltage motor starter enabling equalized input/output volt-amp ratings 失效
    固态，降压电机起动器，可实现均衡的输入/输出电压额定值

    公开(公告)号：US5838144A

    公开(公告)日：1998-11-17

    申请号：US852502

    申请日：1997-05-07

    申请人： Frank E. Wills ,  Harold R. Schnetzka

    发明人： Frank E. Wills ,  Harold R. Schnetzka

    IPC分类号： H02P1/26 ,  H02M5/257 ,  H02P1/42 ,  H02P25/04 ,  H02P27/08 ,  G05F1/10

    CPC分类号： H02P1/42 ,  H02M5/2576 ,  H02P25/04

    摘要： A motor starter circuit for minimizing the amount of current drawn by the motor from a power source during starting of the motor through current transformation achieved by selectively controlling actuation of a plurality of high speed switches. The circuit is for use with a alternating current power source that provides positive and negative voltage alternations, and an alternating current motor. The motor starter circuit comprises a first bidirectional switch through which line current from the power source is provided to the motor, and a pair of switch-diode combinations electrically configured to carry the current in the motor when the bidirectional switch, which is controlled to cycle between an open and a closed position, is in an open position. Actuation of the pair of switch-diode combinations is controlled based on the polarity of the motor current alternation. The resulting current transformation minimizes the current drawn by the motor during starting, and enables equalized input volt-amp product and output volt-amp product. The starting current drawn is reduced from the available line current in proportion to the duty cycle of the bidirectional switch.

    摘要翻译： 一种电动机起动器电路，用于通过选择性地控制多个高速开关的致动，通过电流转换来最小化电动机在启动电动机期间从电源引出的电流量。 该电路用于提供正负电压交替的交流电源和交流电动机。 电动机起动器电路包括第一双向开关，通过该第一双向开关将来自电源的线电流提供给电动机，以及一对开关二极管组合，电配置为当双向开关被控制为循环时携带电流 在打开位置和关闭位置之间处于打开位置。 一对开关二极管组合的驱动基于电动机电流交替的极性来控制。 所得到的电流变换使起动期间电机吸收的电流最小化，并使均衡的输入伏安产品和输出伏安产品成为可能。 与双向开关的占空比成比例，从可用线路电流中减小启动电流。

    Optocoupler circuit for gate driver
    20.
    发明授权
    Optocoupler circuit for gate driver 有权
    用于栅极驱动器的光电耦合器电路

    公开(公告)号：US08624213B2

    公开(公告)日：2014-01-07

    申请号：US13520469

    申请日：2011-01-12

    申请人： Shreesha Adiga-Manoor ,  Harold R. Schnetzka

    发明人： Shreesha Adiga-Manoor ,  Harold R. Schnetzka

    IPC分类号： G02B27/00 ,  H02H1/04 ,  H02H9/08

    CPC分类号： H03K17/16 ,  H03K17/78 ,  H04B10/802

    摘要： An optocoupler circuit includes a switch connected in parallel with a photo LED, the photo LED having an anode and a cathode. The anode is connected to a power supply via a decoupling capacitor. The optocoupler circuit is arranged so that the switch turns on the photo LED when in the open position. When closed, the switch directs current flow through a series resistor to ground and shunts current flow away from the photo LED to turn off the photo LED. A second capacitor is connected to the cathode of the photo LED. The second capacitor is wired in series with a second switch and a current limiting resistor connected to ground. The first switch and second switch operate in complementary states to prevent the cathode connected capacitor from discharging. The disclosed optocoupler circuit provides the ability to function at increased levels of common mode voltage transients.

    摘要翻译： 光耦合器电路包括与光LED平行连接的开关，该光LED具有阳极和阴极。 阳极通过去耦电容器连接到电源。 光耦合器电路布置成使得当处于打开位置时，开关接通照明LED。 闭合时，开关将电流流过串联电阻器接地，并将电流从照片LED分流，以关闭照片LED。 第二电容器连接到照明LED的阴极。 第二个电容器与第二个开关和限流电阻相连接在地上。 第一开关和第二开关工作在互补状态，以防止阴极连接的电容器放电。 所公开的光耦合器电路提供在增加的共模电压瞬变水平下工作的能力。