公开(公告)号：US20210184595A1

公开(公告)日：2021-06-17

申请号：US17130779

申请日：2020-12-22

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

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

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：US10739042B2

公开(公告)日：2020-08-11

申请号：US15479588

申请日：2017-04-05

Applicant: Inertech IP LLC

Inventor： Ming Zhang ,  John Costakis

IPC: F25B7/00 ,  F25B25/00 ,  H05K7/20 ,  F25B41/04 ,  F25B49/02

Abstract: The cooling systems of the present disclosure include a first refrigerant circuit in thermal communication with a heat load and in fluid communication with a main condenser, a free cooling circuit in fluid communication with the main condenser and a free-cooled water source, a chilled water circuit in fluid communication with the main condenser and an evaporator, and a second refrigerant circuit in fluid communication with the evaporator and a secondary condenser. The free cooling circuit is in thermal communication with the first refrigerant circuit via the main condenser, the chilled water circuit is in thermal communication with the first refrigerant circuit via the main condenser, and the second refrigeration circuit is in thermal communication with the chilled water circuit and the free cooling circuit. The second refrigeration circuit cools a fluid flowing in the chilled water circuit. Methods of operating a cooling system are also disclosed.

公开(公告)号：US20200076229A1

公开(公告)日：2020-03-05

申请号：US16505543

申请日：2019-07-08

Applicant: Inertech IP LLC

Inventor： Jakob CARNEMARK ,  Piero OLIVERI

IPC: H02J9/06 ,  H02J3/38

Abstract: A power supply system includes an energy storage device electrically connected to a power grid, a power distribution assembly electrically connected to a load, and a power generation device electrically connected to the power distribution assembly. The energy storage device and the power grid are configured to supply electric power having a first voltage range to the power distribution assembly, which in turn, is configured to supply electric power having a second voltage range less than the first voltage range to the load. The energy storage device and the power generation device each are configured to at least temporarily supply a flow of electric power to the power distribution assembly when electric power from the power grid is interrupted such that a substantially uninterrupted flow of electric power is supplied to the load.

公开(公告)号：US10348125B2

公开(公告)日：2019-07-09

申请号：US15141406

申请日：2016-04-28

Applicant: INERTECH IP, LLC

Inventor： Jakob Carnemark ,  Piero Oliveri

IPC: H02J9/06 ,  H02J3/38

Abstract: A power supply system includes an energy storage device electrically connected to a power grid, a power distribution assembly electrically connected to a load, and a power generation device electrically connected to the power distribution assembly. The energy storage device and the power grid are configured to supply electric power having a first voltage range to the power distribution assembly, which in turn, is configured to supply electric power having a second voltage range less than the first voltage range to the load. The energy storage device and the power generation device each are configured to at least temporarily supply a flow of electric power to the power distribution assembly when electric power from the power grid is interrupted such that a substantially uninterrupted flow of electric power is supplied to the load.

公开(公告)号：USD744996S1

公开(公告)日：2015-12-08

申请号：US29449647

申请日：2013-03-15

Applicant: INERTECH IP LLC

Designer： Earl Keisling ,  John Costakis ,  Michael Welch

公开(公告)号：US20140311169A1

公开(公告)日：2014-10-23

申请号：US13821623

申请日：2012-05-14

Applicant: Gerald McDonnell ,  Earl Keisling ,  John Costakis

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。