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    VARIABLE SPEED DRIVE
    3.
    发明申请
    VARIABLE SPEED DRIVE 审中-公开
    变速驱动

    公开(公告)号：WO2008137276A1

    公开(公告)日：2008-11-13

    申请号：PCT/US2008/060612

    申请日：2008-04-17

    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY ,  SCHNETZKA, Harold R.

    Inventor： SCHNETZKA, Harold R.

    IPC: H02H7/12

    CPC classification number: H02H7/1216 ,  H02M1/32 ,  H02M5/458

    Abstract: A variable speed drive (VSD) for heating, ventilation, air-conditioning and refrigeration (HVAC & R) applications includes a variable speed drive system configured to receive an input AC voltage at a fixed AC input voltage and provide an output AC power at a variable voltage variable frequency. The variable speed drive includes a converter stage connected to an AC power source providing the input AC voltage, the converter stage being configured to convert the input AC voltage to a boosted DC voltage; a DC link connected to the converter stage, the DC link being configured to filter and store the boosted DC voltage from the converter stage; and an inverter stage connected to the DC link, the inverter stage being configured to convert the boosted DC voltage from the DC link into the output AC power having the variable voltage and the variable frequency. The variable speed drive also includes a ground fault protection system for interrupting fault current flowing to an input phase of the active converter, the ground fault on an input phase of the active converter, and the controller; wherein the active converter further includes at least two semiconductor switches for each power phase of the AC power source; each of inversely connected to switch in parallel, wherein each of the reverse lGBTs inversely connected to switch the RB IGBTs to a nonconductive state in response to a sensed ground fault current.

    Abstract translation: 用于加热，通风，空调和制冷（HVAC＆R）应用的变速驱动器（VSD）包括变速驱动系统，其被配置为接收固定的AC输入电压的输入AC电压，并在 可变电压可变频率。 变速驱动器包括连接到提供输入AC电压的AC电源的转换器级，转换器级被配置为将输入AC电压转换为升压的DC电压; 连接到所述转换器级的DC链路，所述DC链路被配置为过滤并存储来自所述转换器级的升压DC电压; 以及连接到所述DC链路的逆变器级，所述逆变器级被配置为将来自所述DC链路的升压DC电压转换为具有所述可变电压和所述可变频率的输出AC电力。 变速驱动器还包括用于中断流入有源转换器的输入相的故障电流的接地故障保护系统，有源转换器的输入相的接地故障和控制器; 其中所述有源转换器还包括用于所述AC电源的每个电力相位的至少两个半导体开关; 每个反向连接到并联开关，其中每个反向lGBT反向连接以响应于感测到的接地故障电流将RB IGBT切换到非导通状态。

    RIDE-THROUGH METHOD AND SYSTEM FOR HVAC&R CHILLERS
    4.
    发明申请
    RIDE-THROUGH METHOD AND SYSTEM FOR HVAC&R CHILLERS 审中-公开
    用于HVAC＆R冷却器的方法和系统

    公开(公告)号：WO2007143217A2

    公开(公告)日：2007-12-13

    申请号：PCT/US2007/013417

    申请日：2007-06-07

    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY ,  SCHNETZKA, Harold R. ,  JADRIC, Ivan

    Inventor： SCHNETZKA, Harold R. ,  JADRIC, Ivan

    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: 一种在冷却器/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。

    OPTOCOUPLER CIRCUIT FOR GATE DRIVER
    5.
    发明申请
    OPTOCOUPLER CIRCUIT FOR GATE DRIVER 审中-公开
    门控驱动器的电路板电路

    公开(公告)号：WO2011090853A1

    公开(公告)日：2011-07-28

    申请号：PCT/US2011/020915

    申请日：2011-01-12

    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY ,  ADIGA-MANOOR, Shreesha ,  SCHNETZKA, Harold R.

    Inventor： ADIGA-MANOOR, Shreesha ,  SCHNETZKA, Harold R.

    IPC: H03K17/78 ,  H03K17/16 ,  H04B10/00

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

    Abstract: An optocoupler circuit (10) includes a switch (22) connected in parallel with a photo LED (20), the photo LED (20) having an anode and a cathode. The anode is connected to a power supply via a decoupling capacitor (28). The optocoupler circuit is arranged so that the switch turns on the photo LED when in the open position. When closed, the switch (22) directs current flow through a series resistor (32) to ground and shunts current flow away from the photo LED to turn off the photo LED. A second capacitor (38) is connected to the cathode of the photo LED. The second capacitor is wired in series with a second switch (40) and a current limiting resistor (42) connected to ground. The first switch (22) and second switch (04) operate in complementary states to prevent the cathode connected capacitor (38) from discharging. The disclosed optocoupler circuit (10) provides the ability to function at increased levels of common mode voltage transients.

    Abstract translation: 光耦合器电路（10）包括与光LED（20）并联连接的开关（22），所述光LED（20）具有阳极和阴极。 阳极经由去耦电容器（28）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。 当闭合时，开关（22）将电流流过串联电阻（32）接地，并将电流从照片LED分流，以关闭照片LED。 第二电容器（38）连接到照明LED的阴极。 第二电容器与第二开关（40）和限流电阻（42）串联连接到地。 第一开关（22）和第二开关（04）以互补状态工作，以防止阴极连接的电容器（38）放电。 所公开的光耦合器电路（10）提供在增加的共模电压瞬变水平下起作用的能力。

    SYSTEM AND METHOD TO EXTEND SYNCHRONOUS OPERATION OF AN ACTIVE CONVERTER IN A VARIABLE SPEED DRIVE
    6.
    发明申请
    SYSTEM AND METHOD TO EXTEND SYNCHRONOUS OPERATION OF AN ACTIVE CONVERTER IN A VARIABLE SPEED DRIVE 审中-公开

    公开(公告)号：WO2008092154A3

    公开(公告)日：2008-07-31

    申请号：PCT/US2008/052211

    申请日：2008-01-28

    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY ,  SCHNETZKA, Harold R. ,  ADIGA MANOOR, Shreesha

    Inventor： SCHNETZKA, Harold R. ,  ADIGA MANOOR, Shreesha

    IPC: H02M5/42 ,  H02P27/00 ,  H03L7/093 ,  H03L7/095

    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.

    RIDE-THROUGH METHOD AND SYSTEM FOR HVAC&R CHILLERS
    8.
    发明申请
    RIDE-THROUGH METHOD AND SYSTEM FOR HVAC&R CHILLERS 审中-公开
    用于HVAC＆R冷却器的方法和系统

    公开(公告)号：WO2007030176A1

    公开(公告)日：2007-03-15

    申请号：PCT/US2006/022716

    申请日：2006-06-12

    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY ,  SCHNETZKA, Harold R. ,  JADRIC, Ivan

    Inventor： SCHNETZKA, Harold R. ,  JADRIC, Ivan

    IPC: H02M5/458

    CPC classification number: H02J9/062 ,  H02M5/458

    Abstract: A method of providing ridethrough capability in a chiller 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 system. The ridethrough 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. Prerotation vanes, slide valve, or check valve are used to unload the compressor.

    Abstract translation: 在冷冻机系统中提供穿通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。 感应电动机连接到逆变器级的输出端，用于驱动冷却器系统中的压缩机。 绕线方法包括操作有源转换器以将直流链路级的直流链路电压调节到预定电压电平，直到通过有功转换器的电流等于预定电流限制，然后在到达逆变器时将DC链路的调节转移到逆变器 转换器的电流限制。 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。 预压叶片，滑阀或止回阀用于卸载压缩机。

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