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    TRANSFORMERLESS MULTI-LEVEL MEDIUM-VOLTAGE UNINTERRUPTABLE POWER SUPPLY (UPS) SYSTEMS AND METHODS
    11.
    发明申请
    TRANSFORMERLESS MULTI-LEVEL MEDIUM-VOLTAGE UNINTERRUPTABLE POWER SUPPLY (UPS) SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20190140476A1

    公开(公告)日：2019-05-09

    申请号：US15991700

    申请日：2018-05-29

    Applicant: Inertech IP LLC

    Inventor： Subrata K. Mondal

    IPC: H02J9/06 ,  H02M3/156

    Abstract: Systems and methods for supplying power at a medium voltage from an uninterruptible power supply (UPS) to a load without using a transformer are disclosed. The UPS includes an energy storage device, a single stage DC-DC converter or a two-stage DC-DC converter, and a multi-level inverter, each of which are electrically coupled to a common negative bus. The DC-DC converter may include two stages in a unidirectional or bidirectional configuration. One stage of the DC-DC converter uses a flying capacitor topology. The voltages across the capacitors of the flying capacitor topology are balanced and switching losses are minimized by fixed duty cycle operation. The DC-DC converter generates a high DC voltage from a low or high voltage energy storage device such as batteries and/or ultra-capacitors. The multi-level, neutral point, diode-clamped inverter converts the high DC voltage into a medium AC voltage using a space vector pulse width modulation (SVPWM) technique. The UPS may also include a small filter to remove harmonics in the AC voltage output from the multi-level inverter.

    SYSTEMS AND ASSEMBLIES FOR COOLING SERVER RACKS
    13.
    发明申请
    SYSTEMS AND ASSEMBLIES FOR COOLING SERVER RACKS 审中-公开

    公开(公告)号：US20170374765A1

    公开(公告)日：2017-12-28

    申请号：US15590596

    申请日：2017-05-09

    Applicant: INERTECH IP LLC

    Inventor： Earl Keisling ,  John Costakis ,  Gerald McDonnell ,  Michael Welch

    IPC: H05K7/20 ,  H05K5/02

    CPC classification number: H05K7/20218 ,  H05K5/02 ,  H05K7/20145 ,  H05K7/20609 ,  H05K7/20736 ,  H05K7/20745 ,  H05K7/20781 ,  H05K7/2079

    Abstract: A cooling assembly for cooling server racks includes a server rack enclosure sub-assembly that includes at least one panel member defining a volume for receiving one or more server racks having a front portion and a rear portion, at least one of the panel members is a rear panel member; at least one frame member defines an opening for receiving the rear portion of the server racks to form a hot space between the rear panel member and the combination of the frame member and the rear portion of the server racks; a cooling sub-assembly disposed in thermal communication with the hot space to cool at least one server supported in the server rack and including a chassis receiving at least one heat exchange member for exchanging heat between a refrigerant fluid flowing through the heat exchange member and fluid flowing through the hot space heated by the server.

    SYSTEMS AND METHODS FOR CONTROLLING MULTI-LEVEL DIODE-CLAMPED INVERTERS USING SPACE VECTOR PULSE WIDTH MODULATION (SVPWM)
    14.
    发明申请
    SYSTEMS AND METHODS FOR CONTROLLING MULTI-LEVEL DIODE-CLAMPED INVERTERS USING SPACE VECTOR PULSE WIDTH MODULATION (SVPWM) 有权

    公开(公告)号：US20170229977A1

    公开(公告)日：2017-08-10

    申请号：US15493978

    申请日：2017-04-21

    Applicant: Inertech IP LLC

    Inventor： Subrata K Mondal

    IPC: H02M7/487 ,  H02M3/04 ,  H02J9/06

    CPC classification number: H02M7/487 ,  H02J9/061 ,  H02M3/04 ,  H02M2007/53876

    Abstract: Control systems for a multi-level diode-clamped inverter and corresponding methods include a processor and a digital logic circuit forming a hybrid controller. The processor identifies sector and region locations based on a sampled reference voltage vector V* and angle θe*. The processor then selects predefined switching sequences and pre-calculated turn-on time values based on the identified sector and region locations. The digital logic circuit generates PWM switching signals for driving power transistors of a multi-level diode-clamped inverter based on the turn-on time values and the selected switching sequences. The control system takes care of the existing capacitor voltage balancing issues of multi-level diode-clamped inverters while supplying both active and reactive power to an IT load. Using the control system, one can generate a symmetrical PWM signal that fully covers the linear under-modulation region.

    SYSTEM AND METHODS FOR COOLING ELECTRONIC EQUIPMENT
    16.
    发明申请
    SYSTEM AND METHODS FOR COOLING ELECTRONIC EQUIPMENT 审中-公开
    冷却电子设备的系统和方法

    公开(公告)号：US20160120067A1

    公开(公告)日：2016-04-28

    申请号：US14834746

    申请日：2015-08-25

    Applicant: INERTECH IP LLC

    Inventor： Gerald McDonnell ,  Earl Keisling ,  John Costakis

    IPC: H05K7/20

    CPC classification number: H05K7/20381 ,  F25B31/006 ,  F25B2600/021 ,  H05K7/2029 ,  H05K7/20327 ,  H05K7/20745 ,  H05K7/20827 ,  Y02B30/741 ,  Y10T29/49359

    Abstract: Systems and methods for cooling an inverter of a variable frequency drive that drives a compressor in a cooling system for electronic equipment are disclosed. The system includes a first fluid circuit that cools electronic equipment using a first fluid flowing therethrough and a second fluid circuit that free cools a second fluid flowing therethrough. The second fluid circuit cools the first fluid using the free-cooled second fluid. The system further includes a third fluid circuit that mechanically cools the second fluid using a third fluid flowing therethrough as a function of the wet bulb temperature of atmospheric air. The third fluid circuit includes at least one compressor compresses the third fluid and is driven by a motor coupled to the variable frequency drive. At least a portion of the first fluid flowing through the third fluid circuit is diverted to cool the inverter of the variable frequency drive.

    Abstract translation: 公开了用于冷却驱动电子设备的冷却系统中的压缩机的变频驱动器的逆变器的系统和方法。 该系统包括使用流过其中的第一流体冷却电子设备的第一流体回路，以及第二流体回路，其自由地冷却流过其中的第二流体。 第二流体回路使用自由冷却的第二流体冷却第一流体。 该系统还包括第三流体回路，其使用流过其中的第三流体作为大气空气的湿球温度的函数机械地冷却第二流体。 第三流体回路包括至少一个压缩机压缩第三流体并由耦合到变频驱动器的马达驱动。 流过第三流体回路的第一流体的至少一部分被转向以冷却变频驱动器的逆变器。

    COOLING SYSTEM INCLUDING A CONTROLLED ATMOSPHERIC HEAT REJECTION CYCLE WITH WATER RE-CAPTURE
    17.
    发明申请
    COOLING SYSTEM INCLUDING A CONTROLLED ATMOSPHERIC HEAT REJECTION CYCLE WITH WATER RE-CAPTURE 审中-公开
    包括控制大气热排放周期的冷却系统

    公开(公告)号：US20140096562A1

    公开(公告)日：2014-04-10

    申请号：US14050324

    申请日：2013-10-09

    Applicant: Inertech IP LLC

    Inventor： Gerald McDonnell ,  Earl Keisling

    IPC: F25B39/02

    CPC classification number: F25B39/028 ,  F24F5/0035 ,  F28C1/14 ,  F28D5/02

    Abstract: The present disclosure relates to a cooling system including a controlled atmospheric heat rejection cycle with water re-capture. The cooling system for cooling a heat load includes a first evaporative section configured to circulate a first fluid to enable heat transfer from the heat load to the first fluid, a second evaporative section in fluid communication with the first evaporative section and configured to circulate the first fluid, and a liquid refrigerant distribution unit in thermal communication with the second evaporative section. The liquid refrigerant distribution unit is configured to circulate a second fluid to enable heat transfer from the first fluid to the second fluid.

    Abstract translation: 本公开涉及一种包括具有水再捕获的受控大气排热循环的冷却系统。 用于冷却热负荷的冷却系统包括第一蒸发部分，其被配置为循环第一流体以使得能够从热负荷到第一流体的热传递;第二蒸发部分，其与第一蒸发部分流体连通并且构造成使第一流体循环 流体和与第二蒸发部热连通的液体制冷剂分配单元。 液体制冷剂分配单元构造成使第二流体循环，以使得能够从第一流体到第二流体的热传递。

    Systems and Methods for Supplying Uninterruptible Power
    19.
    发明公开
    Systems and Methods for Supplying Uninterruptible Power 审中-公开

    公开(公告)号：US20240243606A1

    公开(公告)日：2024-07-18

    申请号：US18419522

    申请日：2024-01-22

    Applicant: Inertech IP LLC

    Inventor： Jakob CARNEMARK ,  Robert S. STONE

    IPC: H02J9/08 ,  H02J9/06

    CPC classification number: H02J9/08 ,  H02J9/062

    Abstract: Electrical systems for providing uninterruptible power to a critical load. One electrical system includes a ring bus, multiple power blocks including one or more generators electrically coupled to the ring bus, and uninterruptible power supplies (UPSs) electrically coupled to the ring bus. In some aspects, the electrical system includes a UPS switchgear electrically coupled between the ring bus and the UPSs. In other aspects, the UPSs are electrically coupled together in parallel. Another electrical system includes a utility switchgear, UPS blocks electrically coupled together in parallel and electrically coupled to the utility switchgear via transformers, low voltage (LV) power blocks electrically coupled to the UPS blocks, and medium voltage (MV) switchgear electrically coupled to the UPS blocks via transformers. Each of the LV power blocks include one or more generators.

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