A Double-ended Converter System with Two Different DC-buses Using Open Winding Permanent Magnet Machine for Traction Applications

Abstract

In hybrid electric vehicles (HEVs), there are usually several different DC-buses of different voltage levels to handle different loads. DC–DC converters are used to transfer energy between different DC-buses. This paper proposed a double-ended converter for two different DC-buses with large voltage ratio. The high-voltage DC-bus is 600 V for the traction motor drive, while the low-voltage DC-bus is 48 V for the electronic devices on the vehicle. By using the proposed system configuration, energy could be transferred freely between the generator and the two loads, forming a very flexible powertrain. In addition, the weight, volume, and cost of power electronics components could be reduced. This paper introduced the operation principal and control algorithm of the proposed system. Simulations verified the functionality of the proposed system. The proposed system configuration is not only suitable for automotive applications, but can also be implemented in other applications, such as aerospace, marine, and industrial, where multiple DC-bus voltage levels are required.

Keywords::

• double-ended converter system
• hybrid electric vehicle
• open-winding machine
• power electronics

Additional information

Notes on contributors

Silong Li

Silong Li received the B.S. degree from Xi'an Jiaotong University, Xi'an, China, 2011, the M.S. degree from University of Wisconsin-Madison, 2014, and the Ph.D. degree from University of Wisconsin-Madison, 2017, all in electrical and electronics engineering. He is currently a control engineer at Ford Motor Company, Dearborn, MI. During his Ph.D. study, he was a Research Assistant with the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC). His research interests include design and analysis of novel permanent magnet machines, and high-performance permanent magnet machine control algorithms.

Di Han

Di Han received the B.S. degree in electrical engineering from Huazhong University of Science and Technology, Wuhan, China, in 2011 and the Ph.D. degree electrical engineering from the University of Wisconsin-Madison, Madison, WI in 2017. He is currently a senior applications engineer at Monolithic Power Systems, Inc., San Jose, CA. During his Ph.D. study, he was a Research Assistant with the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC). His research interests include wide bandgap devices based power converter design and electromagnetic interference in motor drives.

Bulent Sarlioglu

Bulent Sarlioglu received the B.S. degree from Istanbul Technical University, in 1990 and the M.S. degree from University of Missouri-Columbia, in 1992 and the Ph.D. degree from University of Wisconsin-Madison, in 1999, all in electrical engineering. Since 2011, he has been an assistant professor at the University of Wisconsin-Madison and the associate director of the Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC). From 2000 to 2011, he worked at Honeywell International Inc.'s aerospace division, most recently as a Staff Systems Engineer, Torrance, California. He received Honeywell's outstanding engineer award in 2011. He is the inventor or co-inventor of 16 US patents as well as many international patents. His research interests includes electrical machines, drives, and power electronics.