公开(公告)号：US11927363B2

公开(公告)日：2024-03-12

申请号：US17329132

申请日：2021-05-24

Applicant: INERTECH IP LLC

Inventor： Ken Nguyen

IPC: F24F9/00 ,  F24F13/02 ,  H05K7/20

CPC classification number: F24F9/00 ,  F24F13/0254 ,  H05K7/20709 ,  H05K7/20745 ,  F24F2009/002

Abstract: An air curtain containment system and assembly for data centers forms an air curtain over the server cabinets thereby separating hot air in a hot aisle from cool ambient air. The air curtain containment system includes ducts which include a hot air intake section that receives hot air discharged from servers, which are disposed in server cabinets. The ducts include heat exchangers for cooling the hot air and at least one air curtain discharge section. A housing is coupled to a wall of the ducts, and includes a cooling edge device fan. The cooling edge device fan is disposed along the ducts, and is configured to draw the hot air for cooling through the heat exchangers. An air curtain fan assembly is disposed along the ducts. The air curtain fan assembly expels cold air through the air curtain discharge section, and thereby forms an air curtain over the server cabinets.

公开(公告)号：US11881742B2

公开(公告)日：2024-01-23

申请号：US17697905

申请日：2022-03-17

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.

公开(公告)号：US11296546B2

公开(公告)日：2022-04-05

申请号：US16653988

申请日：2019-10-15

Applicant: Inertech IP LLC

Inventor： Jakob Carnemark ,  Robert S. Stone

IPC: H02J9/08 ,  H02J9/06

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.

公开(公告)号：US20210076538A1

公开(公告)日：2021-03-11

申请号：US16928633

申请日：2020-07-14

Applicant: Inertech IP LLC

Inventor： Earl Keisling ,  John Costakis ,  Gerald McDonnell

IPC: H05K7/20 ,  F21V33/00

Abstract: An air flow distribution system for cooling server racks includes at least one server rack partially defining a hot aisle and a cold aisle, a first air foil disposed above the server rack, and a second air foil disposed above the first air foil. The first air foil and the second air foil are configured to receive air from the hot aisle, and to form turbulent wake patterns in the cold aisle partially defined by the server rack. The air flow distribution system may include a convex ceiling member above the second air foil. A corresponding method includes causing air to be directed between a first air foil disposed above a server rack and a second air foil disposed above the first air foil to form turbulent wake patterns in the cold aisle. An electrical enclosure assembly includes a receptacle and a cover member configured as an air foil.

公开(公告)号：US10931190B2

公开(公告)日：2021-02-23

申请号：US15333177

申请日：2016-10-24

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

IPC: H02J9/06 ,  H02M1/12 ,  H02M3/158 ,  H02M7/537 ,  H02J3/18 ,  H02J3/32 ,  H02M7/487 ,  H02J3/01 ,  H02J3/28

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.

公开(公告)号：US10693312B2

公开(公告)日：2020-06-23

申请号：US15883496

申请日：2018-01-30

Applicant: INERTECH IP LLC

Inventor： Subrata K. Mondal

IPC: H02J1/10 ,  H02J9/06 ,  H02J9/04 ,  G06F1/30

Abstract: An efficient, modular, direct current (DC) uninterruptible power supply (UPS) for at least one server of a data center is disclosed. The single-conversion DC UPS includes an AC-DC converter, an energy storage device electrically coupled to the output of the AC-DC converter, and a single conversion server supply DC-DC converter electrically coupled to the AC-DC converter and the energy storage device, which may be a low-voltage lithium-ion battery or combined with an ultra capacitor. The DC UPS may be incorporated into a UPS system for a data center including a plurality of server rack assemblies and a plurality of cooling distribution units (CDUs). The UPS system includes an electric generator, an AC UPS electrically coupled between the electric generator and the plurality of CDUs, and a plurality of DC UPSs coupled between the electric generator and the plurality of server rack assemblies.

公开(公告)号：US20200076322A1

公开(公告)日：2020-03-05

申请号：US16545974

申请日：2019-08-20

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

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

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.

公开(公告)号：US10193380B2

公开(公告)日：2019-01-29

申请号：US14994850

申请日：2016-01-13

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal ,  Jakob Carnemark

IPC: H02J7/00 ,  H02J9/00 ,  H02J9/06

Abstract: Modular dual power sources and corresponding systems include a common hybrid energy storage system, a high frequency DC-DC converter coupled between the common hybrid energy storage system, and an ultra-capacitor module for starting up a generator, and a two-level inverter coupled to the common hybrid energy storage system to provide power in case of an interruption in power supplied by a utility supply. The hybrid energy storage system includes an ultra-capacitor module and a battery module. A fast charger is coupled to the hybrid energy storage system to quickly charge the ultra-capacitor module and the battery module, which, in turn, charge the ultra-capacitor module for starting up a generator via a high frequency DC-DC converter. High frequency transformers are used to magnetically isolate electrical noise of the generator and UPS functions and operate independently. The modular dual power sources can be connected in parallel to provide large MW output power.

公开(公告)号：US20180294741A1

公开(公告)日：2018-10-11

申请号：US15913387

申请日：2018-03-06

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

IPC: H02M7/487 ,  H02M3/04 ,  H02J9/06 ,  H02M7/5387

CPC classification number: H02M7/487 ,  H02J9/061 ,  H02M1/0845 ,  H02M3/04 ,  H02M7/49 ,  H02M7/53873 ,  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.

公开(公告)号：US20180269782A1

公开(公告)日：2018-09-20

申请号：US15853704

申请日：2017-12-22

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

IPC: H02M3/155 ,  H02J7/00 ,  H02J9/00 ,  H02M1/04 ,  H02M1/08 ,  H02M7/527

CPC classification number: H02M3/155 ,  H02J7/0063 ,  H02J9/00 ,  H02J9/062 ,  H02M1/04 ,  H02M1/083 ,  H02M3/158 ,  H02M3/1582 ,  H02M3/33584 ,  H02M7/487 ,  H02M7/527 ,  H02M2001/0058 ,  H02M2001/0064 ,  H02M2001/007 ,  H02M2001/0077 ,  Y02B70/1491

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.