公开(公告)号：US09774190B2

公开(公告)日：2017-09-26

申请号：US14481904

申请日：2014-09-09

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

IPC: H02J1/10 ,  H02J3/38 ,  H02J9/00 ,  H02J3/32 ,  H02J3/18 ,  H02M7/483 ,  H02J7/34 ,  H02M1/00

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.

公开(公告)号：US20170117748A1

公开(公告)日：2017-04-27

申请号：US15333177

申请日：2016-10-24

Applicant: Inertech IP LLC

Inventor： Subrata K. Mondal

IPC: H02J9/06 ,  H02M7/537 ,  H02M1/12 ,  H02M3/158

CPC classification number: H02M1/12 ,  H02J3/01 ,  H02J3/1857 ,  H02J3/28 ,  H02J3/32 ,  H02M3/158 ,  H02M7/487 ,  Y02E40/26 ,  Y02E40/40

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.