公开(公告)号：WO2019168755A1

公开(公告)日：2019-09-06

申请号：PCT/US2019/019173

申请日：2019-02-22

Applicant: NORTH CAROLINA STATE UNIVERSITY

Inventor： LUKIC, Srdjan ,  WON, Jehyuk ,  SRDIC, Srdan ,  LIANG, Xinyu

IPC: H02M1/12 ,  H02M3/28 ,  H02M7/219 ,  H02M7/483 ,  H02M7/797 ,  H02J3/32 ,  H02J7/34

Abstract: A cascaded modular multilevel converter for medium-voltage power electronics systems is disclosed. The converter can be used in applications such as an auxiliary power supply for medium-voltage (MV) power electronics system, or a unidirectional SST which powers a home (where very light load conditions are experienced when the home is unoccupied or during the night). Unlike the traditional solutions which use a grid-frequency, bulky, and heavy power transformers, the disclosed converter can operate at higher switching frequencies, weigh less, and provide a higher power density than other approaches. Additionally, the disclosed converter features an internal capacitor voltage balancing and can achieve power factor correction (PFC) using predictive control.

公开(公告)号：WO2018208991A1

公开(公告)日：2018-11-15

申请号：PCT/US2018/031903

申请日：2018-05-09

Applicant: NORTH CAROLINA STATE UNIVERSITY

Inventor： LUKIC, Srdjan ,  LIANG, Xinyu ,  ZHANG, Chi ,  SRDIC, Srdan

IPC: H02J7/10 ,  H02M7/04 ,  H02H3/08 ,  H02H3/20 ,  H01F19/08

Abstract: Certain embodiments involve a modular medium voltage fast charger. The modular medium voltage fast charger can include: (1) a predictive power factor correction ("PFC") controller (or predictive controller) for series-interleaved multi-cell three-level boost ("SIMCB") converters, (2) an active neutral point clamped ("NPC") dual active bridge ("DAB") modulation scheme to achieve soft switching, (3) an auxiliary capacitor to reduce NPC DAB turn-off voltages, (4) a comprehensive and scalable protection circuit, and (5) a high-isolation pulse transformer with a bobbin for reducing coupling capacitance of the pulse transformer.