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公开(公告)号：US12255458B2
公开(公告)日：2025-03-18
申请号：US18087303
申请日：2022-12-22
Applicant: INERTECH IP LLC
Inventor： Subrata K. Mondal
Abstract: Systems and methods for supplying power (both active and reactive) at a medium voltage from a DCSTATCOM to an IT load without using a transformer are disclosed. The DCSTATCOM includes an energy storage device, 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 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.
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公开(公告)号：US20230318299A1
公开(公告)日：2023-10-05
申请号：US18087303
申请日：2022-12-22
Applicant: INERTECH IP LLC
Inventor： Subrata K. Mondal
CPC classification number: H02J3/32 , H02J3/1857 , H02M7/483 , H02M7/4837 , H02J7/345
Abstract: Systems and methods for supplying power (both active and reactive) at a medium voltage from a DCSTATCOM to an IT load without using a transformer are disclosed. The DCSTATCOM includes an energy storage device, 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 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.
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公开(公告)号：US11552474B2
公开(公告)日：2023-01-10
申请号：US17202329
申请日：2021-03-15
Applicant: INERTECH IP LLC
Inventor： Subrata K. Mondal
Abstract: Systems and methods for supplying power (both active and reactive) at a medium voltage from a DCSTATCOM to an IT load without using a transformer are disclosed. The DCSTATCOM includes an energy storage device, 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 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.
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4.发明申请公开(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
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：US10951032B2
公开(公告)日：2021-03-16
申请号：US15715872
申请日：2017-09-26
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal
Abstract: Systems and methods for supplying power (both active and reactive) at a medium voltage from a DCSTATCOM to an IT load without using a transformer are disclosed. The DCSTATCOM includes an energy storage device, 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 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.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190044370A1
公开(公告)日：2019-02-07
申请号：US15883496
申请日：2018-01-30
Applicant: INERTECH IP LLC
Inventor： Subrata K. Mondal
CPC classification number: H02J9/06 , G06F1/30 , H02J1/10 , H02J9/04 , Y10T307/344
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.
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7.发明申请POWER SOURCES AND SYSTEMS UTILIZING A COMMON ULTRA-CAPACITOR AND BATTERY HYBRID ENERGY STORAGE SYSTEM FOR BOTH UNINTERRUPTIBLE POWER SUPPLY AND GENERATOR START-UP FUNCTIONS 审中-公开电源和系统使用通用超级电容器和电池混合动力储存系统，用于两个不间断电源和发电机启动功能公开(公告)号：US20160204654A1
公开(公告)日：2016-07-14
申请号：US14994850
申请日：2016-01-13
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal , Jakob Carnemark
CPC classification number: H02J9/066 , H02J7/0068 , H02J7/007
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.
Abstract translation: 模块化双电源和相应的系统包括通用混合能量存储系统，耦合在公共混合能量存储系统之间的高频DC-DC转换器和用于启动发电机的超级电容器模块，以及耦合 到普通的混合动力储能系统，以便在公用电力供应的电力中断的情况下提供电力。 混合能量存储系统包括超电容器模块和电池模块。 快速充电器耦合到混合能量存储系统，以便对超电容器模块和电池模块进行快速充电，该电池模块和电池模块又对超电容器模块充电，以通过高频DC-DC转换器启动发电机。 高频变压器用于磁隔离发电机和UPS功能的电气噪声，并独立运行。 模块化双电源可以并联连接，以提供大的MW输出功率。
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8.发明申请MULTI-LEVEL MEDIUM VOLTAGE DATA CENTER STATIC SYNCHRONOUS COMPENSATOR (DCSTATCOM) FOR ACTIVE AND REACTIVE POWER CONTROL OF DATA CENTERS CONNECTED WITH GRID ENERGY STORAGE AND SMART GREEN DISTRIBUTED ENERGY SOURCES 有权多级中压电压数据中心静态同步补偿器（DCSTATCOM）用于与数据中心进行有源和无功功率控制，与数据中心连接，具有能量储存和智能绿色分布式能源公开(公告)号：US20150155712A1
公开(公告)日：2015-06-04
申请号：US14481904
申请日：2014-09-09
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal
CPC classification number: H02J3/32 , H02J3/1857 , H02J7/345 , H02M7/483 , H02M2001/007 , H02M2007/4835 , Y02E40/16 , Y02E40/26 , Y02E70/40 , Y10T307/344
Abstract: Systems and methods for supplying power (both active and reactive) at a medium voltage from a DCSTATCOM to an IT load without using a transformer are disclosed. The DCSTATCOM includes an energy storage device, 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 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.
Abstract translation: 公开了在不使用变压器的情况下从DCSTATCOM向IT负载提供中压电力（有源和无功）的系统和方法。 DCSTATCOM包括一个能量存储装置，一个两级DC-DC转换器和一个多电平逆变器，每个逆变器都电耦合到一个公共负母线。 DC-DC转换器可以包括双向配置的两个阶段。 DC-DC转换器的一个阶段使用飞跨电容拓扑结构。 通过固定占空比操作，飞跨电容拓扑的电容器两端的电压平衡，开关损耗最小化。 DC-DC转换器从诸如电池和/或超电容器的低或高电压能量存储装置产生高直流电压。 多电平中性点二极管钳位逆变器使用空间矢量脉宽调制（SVPWM）技术将高直流电压转换为中等交流电压。
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公开(公告)号：US20250023488A1
公开(公告)日：2025-01-16
申请号：US18780449
申请日：2024-07-22
Applicant: Inertech IP LLC
Inventor： Subrata K. Mondal
IPC: H02M7/483 , H02J7/00 , H02J9/00 , H02J9/06 , H02M1/00 , H02M1/04 , H02M1/08 , H02M3/155 , H02M3/158 , H02M3/335 , H02M7/487 , H02M7/527
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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10.发明授权公开(公告)号：US11923725B2
公开(公告)日：2024-03-05
申请号：US18078401
申请日：2022-12-09
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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