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    Variable speed drive with integral bypass contactor
    1.
    发明授权
    Variable speed drive with integral bypass contactor 有权
    带集成旁路接触器的变速驱动器

    公开(公告)号：US08014110B2

    公开(公告)日：2011-09-06

    申请号：US11932054

    申请日：2007-10-31

    Applicant: Harold R. Schnetzka ,  Ivan Jadric

    Inventor： Harold R. Schnetzka ,  Ivan Jadric

    IPC: F21V7/04 ,  H02H5/04 ,  H02H7/08

    CPC classification number: H02M1/12 ,  F25B49/025 ,  F25B2600/021 ,  H02M2001/123 ,  H02P27/08 ,  H02P29/50 ,  H02P2201/03 ,  H03L7/093 ,  H03L7/095 ,  H05K7/20936 ,  Y02B30/741

    Abstract: Systems and methods for operating a variable speed drive to receive an input AC power at a fixed AC input voltage and frequency and provide an output AC power at a variable voltage and variable frequency. The variable speed drive includes a converter stage to convert the input AC voltage to a boosted DC voltage, a DC link connected to the converter stage to filter and store the boosted DC voltage from the converter stage; and an inverter stage to convert the boosted DC voltage into AC power with variable voltage and the variable frequency. An integral bypass contactor is connected in parallel with the VSD between the AC power source and the AC output power. The integral bypass contactor is arranged to bypass the VSD when the VSD output frequency and voltage are approximately equal with the AC input voltage and frequency.

    Abstract translation: 用于操作变速驱动器以固定的AC输入电压和频率接收输入AC电力的系统和方法，并以可变电压和可变频率提供输出AC电力。 变速驱动器包括转换器级，用于将输入交流电压转换为升压直流电压;连接到转换器级的直流链路，用于对来自转换器级的升压直流电压进行滤波和存储; 以及将升压的直流电压转换为具有可变电压和可变频率的交流电的逆变器级。 一体式旁路接触器与交流电源和交流输出电源之间的VSD并联连接。 当VSD输出频率和电压与交流输入电压和频率近似相等时，集成旁路接触器被布置为绕过VSD。

    System and method to extend synchronous operation of an active converter in a variable speed drive
    2.
    发明授权
    System and method to extend synchronous operation of an active converter in a variable speed drive 有权
    扩展变频器中有源转换器的同步运行的系统和方法

    公开(公告)号：US07764041B2

    公开(公告)日：2010-07-27

    申请号：US11932280

    申请日：2007-10-31

    Applicant: Harold R. Schnetzka ,  Shreesha Adiga Manoor

    Inventor： Harold R. Schnetzka ,  Shreesha Adiga Manoor

    IPC: H02P27/04

    CPC classification number: H02M1/12 ,  F25B49/025 ,  F25B2600/021 ,  H02M2001/123 ,  H02P27/08 ,  H02P29/50 ,  H02P2201/03 ,  H03L7/093 ,  H03L7/095 ,  H05K7/20936 ,  Y02B30/741

    Abstract: Systems and methods for synchronous operation of variable speed drives having active converters include extending the synchronous operation of an active converter to the AC mains voltage during complete line dropout. A phase angle control circuit includes a squaring amplifier, a first phase-lock loop circuit associated and a second phase-lock loop circuit. The squaring amplifier receives the AC power source and outputs a rectangular output signal to a pair of phase lock loop (PLL) circuits. The first PLL circuit with a first lag-lead filter is configured with a high cutoff frequency to provide the converter stage with a phase angle parameter; and the second phase-lock loop circuit including a second lag-lead filter configured to have a low cutoff frequency to provide the lag-lead filter the capability of storing the phase angle of the mains voltage during mains interruption.

    Abstract translation: 具有有源转换器的变速驱动器的同步操作的系统和方法包括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。 相位角控制电路包括平方放大器，相关的第一锁相环电路和第二锁相环电路。 平方放大器接收交流电源，并向一对锁相环（PLL）电路输出矩形输出信号。 具有第一滞后引线滤波器的第一PLL电路配置有高截止频率，以向转换器级提供相位角参数; 并且所述第二锁相环电路包括被配置为具有低截止频率的第二滞后引线滤波器，以提供所述滞后引线滤波器在电源中断期间存储所述电源电压的相位角的能力。

    Variable speed drive
    3.
    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

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

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

    IPC: H02M5/297 ,  H05K7/20

    CPC classification number: H02M5/4585 ,  H02M7/003

    Abstract: 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.

    Abstract translation: 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
    5.
    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

    Applicant: Ivan Jadrić ,  Harold R. Schnetzka

    Inventor： Ivan Jadrić ,  Harold R. Schnetzka

    IPC: G08B2100

    CPC classification number: G01R31/263 ,  G01R31/343 ,  H02H7/0844

    Abstract: 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.

    Abstract translation: 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
    7.
    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

    Applicant: Shreesha Adiga-Manoor ,  Harold R. Schnetzka

    Inventor： Shreesha Adiga-Manoor ,  Harold R. Schnetzka

    IPC: G02B27/00

    CPC classification number: H03K17/16 ,  H03K17/78 ,  H04B10/802

    Abstract: 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.

    Abstract translation: 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
    9.
    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

    Applicant: Harold R. Schnetzka ,  Ivan Jadric

    Inventor： Harold R. Schnetzka ,  Ivan Jadric

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

    CPC classification number: H02J9/062 ,  H02M5/458

    Abstract: 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.

    Abstract translation: 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。

    Gate drive circuit for an SCR
    10.
    发明授权
    Gate drive circuit for an SCR 失效
    SCR驱动电路

    公开(公告)号：US5850160A

    公开(公告)日：1998-12-15

    申请号：US877623

    申请日：1997-06-18

    Applicant: Harold R. Schnetzka ,  Dean K. Norbeck ,  Donald L. Tollinger

    Inventor： Harold R. Schnetzka ,  Dean K. Norbeck ,  Donald L. Tollinger

    IPC: H02M1/08 ,  H02M7/155 ,  H03K17/72

    CPC classification number: H02M1/08 ,  H02M7/155

    Abstract: A gate drive circuit for a silicon controlled rectifier (SCR) connected in an a-c power circuit includes a voltage divider network connected between a d-c voltage source and the SCR for developing a varying voltage on a control node, depending upon whether the anode-to-cathode a-c voltage of the SCR is positive or negative. A first switching transistor, responsive to the control node voltage, controls conduction of a second switching transistor connected between the d-c voltage source and a voltage regulated driver circuit. In this way, a constant drive current is applied to the SCR gate only while the anode-to-cathode voltage of the SCR is positive.

    Abstract translation: 用于连接在交流电源电路中的可控硅整流器（SCR）的栅极驱动电路包括连接在直流电压源和SCR之间的分压器网络，用于在控制节点上产生变化的电压，这取决于阳极 - SCR的阴极交流电压为正或负。 响应于控制节点电压的第一开关晶体管控制连接在d-c电压源和调压驱动电路之间的第二开关晶体管的导通。 以这种方式，只有在SCR的阳极至阴极电压为正时才将稳定的驱动电流施加到SCR栅极。

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