Circulating current injection control

Publication Date
2018-12-11Filing Date
2017-05-15Inventor
Wang, Jun
Burgos, Rolando
Boroyevich, Dushan
Metadata
Show full item recordAbstract
In one example, a power converter includes a modular multilevel converter (MMC) electrically coupled between a first power system and a second power system. The MMC includes an arrangement of switching submodules, and the switching submodules include an arrangement of switching power transistors and capacitors. The MMC also includes a controller configured to inject a common mode frequency signal into a circulating current control loop. The circulating current control loop is relied upon to reduce at least one low frequency component in power used for charging the capacitors in the switching submodules. By injecting the common mode frequency signal into the circulating current control loop, the switching submodules can be switched at higher frequencies, the capacitances of the capacitors in the MMC can be reduced, and the power density of the MMC can be increased.
Assignee
Virginia Tech Intellectual Properties, Inc.
Toyota Motor Engineering & Manufacturing North America, Inc.
Patent Number
10153712
Application Number
15595109
Primary/U.S. Class
Other/U.S. Class
CPC Class
H02M7/539
H02J5/00
H02M1/143
H02M7/483
H02M2007/4835
Patent Type
utility
Collections
- Virginia Tech Patents [689]