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公开(公告)号：US20230031815A1
公开(公告)日：2023-02-02
申请号：US17856654
申请日：2022-07-01
Applicant: INERTECH IP LLC
Inventor： Ming Zhang , Ken Nguyen , Doron Shapiro , John Costakis
IPC: F28D7/00 , H05K7/20 , F28D1/047 , F28F1/02 , G06F1/20 , F28F9/013 , F28F1/12 , F28D1/053 , F28F21/08 , B23K1/00 , B23P15/26 , F28F9/02
Abstract: A cooling system includes a heat exchanger having one or more rows of multiple flat tubes, louvered fins disposed between pairs of flat tubes, and special header tube connections to form a counter flow heat exchanger. Heat exchangers having multiple rows may be placed near or close to the server racks and may be in fluid communication with an outdoor heat exchanger having one or more rows. A single-phase fluid is pumped through a fluid circuit or loop, which includes the heat exchangers at the server racks and the outdoor heat exchanger. The single-phase fluid circuit including the heat exchangers at the IT racks may alternatively be in thermal communication with a water circuit that includes an outdoor fluid cooler. The flat tubes can be formed tubes with one or more channels, or extruded tubes with multiple channels. The heat exchangers include header tubes/connections, which facilitate easy fabrication and connection between rows and inlet/outlet, and lower the pressure drop.
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公开(公告)号：US11539236B2
公开(公告)日：2022-12-27
申请号：US17124491
申请日：2020-12-16
Applicant: INERTECH IP LLC
Inventor： Subrata K. Mondal
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.
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公开(公告)号：US11384989B2
公开(公告)日：2022-07-12
申请号：US15697445
申请日：2017-09-06
Applicant: Inertech IP LLC
Inventor： Ming Zhang , Ken Nguyen , Doron Shapiro , John Costakis
IPC: F28D7/00 , H05K7/20 , F28D1/047 , F28F1/02 , G06F1/20 , F28F9/013 , F28F1/12 , F28D1/053 , F28F21/08 , B23K1/00 , B23P15/26 , F28F9/02
Abstract: A cooling system includes a heat exchanger having one or more rows of multiple flat tubes, louvered fins disposed between pairs of flat tubes, and special header tube connections to form a counter flow heat exchanger. Heat exchangers having multiple rows may be placed near or close to the server racks and may be in fluid communication with an outdoor heat exchanger having one or more rows. A single-phase fluid is pumped through a fluid circuit or loop, which includes the heat exchangers at the server racks and the outdoor heat exchanger. The single-phase fluid circuit including the heat exchangers at the IT racks may alternatively be in thermal communication with a water circuit that includes an outdoor fluid cooler. The flat tubes can be formed tubes with one or more channels, or extruded tubes with multiple channels. The heat exchangers include header tubes/connections, which facilitate easy fabrication and connection between rows and inlet/outlet, and lower the pressure drop.
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公开(公告)号：US20220014088A1
公开(公告)日：2022-01-13
申请号：US17182035
申请日：2021-02-22
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal
Abstract: Systems and methods of the present disclosure involve passive, hybrid, and active filtering configurations to mitigate current harmonics for various electrical loads. One hybrid filtering configuration is medium voltage (MV) active filtering using a DC-DC converter and a multi-level inverter, and low voltage (LV) passive filtering. Another hybrid filtering configuration is MV passive filtering and LV active filtering using a two-level inverter. An active filtering configuration includes both MV and LV active filtering. The present disclosure also features power distribution unit (PDU) transformers electrically coupled to respective power supplies on the LV side of an electrical system. Each PDU transformer includes primary coils in a delta configuration and secondary coils in a wye configuration. The secondary coils are in series with respective leakage inductance coils. The secondary coils and the leakage inductance coils are integrated together into a single unit or module.
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45.发明申请公开(公告)号：US20210218269A1
公开(公告)日：2021-07-15
申请号：US17124491
申请日：2020-12-16
Applicant: INERTECH IP LLC
Inventor： Subrata K. Mondal
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.
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Patent Agency Ranking
公开(公告)号：US20200227939A1
公开(公告)日：2020-07-16
申请号：US16653988
申请日：2019-10-15
Applicant: Inertech IP LLC
Inventor： Jakob CARNEMARK , Robert S. STONE
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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公开(公告)号：US10673327B2
公开(公告)日：2020-06-02
申请号：US15853704
申请日：2017-12-22
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal
IPC: H02M3/155 , H02J7/00 , H02M7/527 , H02M1/04 , H02M1/08 , H02J9/00 , H02M7/487 , H02M3/158 , H02M3/335 , H02J9/06 , H02M1/00
Abstract: Systems and methods of this disclosure use low voltage energy storage devices to supply power at a medium voltage from an uninterruptible power supply (UPS) to a data center load. The UPS includes a low voltage energy storage device (ultracapacitor/battery), a high frequency (HF) bidirectional DC-DC converter, and a multi-level (ML) inverter. The HF DC-DC converter uses a plurality of HF planar transformers, multiple H-bridge circuits, and gate drivers for driving IGBT devices to generate a medium DC voltage from the ultracapacitor/battery energy storage. The gate drivers are controlled by a zero voltage switching (ZVS) controller, which introduces a phase shift between the voltage on the primary and secondary sides of the transformers. When the primary side leads the secondary side, the ultracapacitor/battery discharges and causes the UPS to supply power to the data center, and when the secondary side leads the primary side, power flows from the grid back to the UPS, thereby recharging the ultracapacitor/battery.
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公开(公告)号：US10448539B2
公开(公告)日：2019-10-15
申请号：US15590596
申请日：2017-05-09
Applicant: INERTECH IP LLC
Inventor： Earl Keisling , John Costakis , Gerald McDonnell , Michael Welch
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.
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公开(公告)号：US10389272B2
公开(公告)日：2019-08-20
申请号：US15913387
申请日：2018-03-06
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal
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.
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公开(公告)号：US20180087841A1
公开(公告)日：2018-03-29
申请号：US15697445
申请日：2017-09-06
Applicant: Inertech IP LLC
Inventor： Ming Zhang , Ken Nguyen , Doron Shapiro , John Costakis
CPC classification number: F28D7/0066 , B23K1/0012 , B23P15/26 , F28D1/0478 , F28D1/05391 , F28F1/022 , F28F1/12 , F28F1/128 , F28F9/013 , F28F9/02 , F28F21/084 , F28F2225/08 , F28F2275/04 , G06F1/20 , G06F2200/201 , H05K7/20654 , H05K7/2079
Abstract: A cooling system includes a heat exchanger having one or more rows of multiple flat tubes, louvered fins disposed between pairs of flat tubes, and special header tube connections to form a counter flow heat exchanger. Heat exchangers having multiple rows may be placed near or close to the server racks and may be in fluid communication with an outdoor heat exchanger having one or more rows. A single-phase fluid is pumped through a fluid circuit or loop, which includes the heat exchangers at the server racks and the outdoor heat exchanger. The single-phase fluid circuit including the heat exchangers at the IT racks may alternatively be in thermal communication with a water circuit that includes an outdoor fluid cooler. The flat tubes can be formed tubes with one or more channels, or extruded tubes with multiple channels. The heat exchangers include header tubes/connections, which facilitate easy fabrication and connection between rows and inlet/outlet, and lower the pressure drop.
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