An H7 Current-Source Inverter using Wide Bandgap Bidirectional Switches to Achieve High Efficiency and Low Conducted Common-Mode EMI

In the below linked research paper published on the website IEEE Xplore, researchers from Wisconsin Electric Machines and Power Electronics Consortium (WEMPEC), University of Wisconsin-Madison, use a Yokogawa Test&Measurement WT1806 High-Performance Power Analyzer to measure the efficiencies of inverters used in the research.

• Title: An H7 Current-Source Inverter using Wide Bandgap Bidirectional Switches to Achieve High Efficiency and Low Conducted Common-Mode EMI
• Authors: Hang Dai, Renato A. Torres, Jerome Gossmann, Woongkul Lee, Thomas M. Jahns, Bulent Sarlioglu
• Abstract: Traditional current-source inverters (CSI) using silicon-based reverse-voltage-blocking (RB) switches typically have high conduction loss, low switching frequency, and bulky size. New bidirectional (BD) switches (also called four-quadrant switches) built from wide-bandgap semiconductor materials such as gallium nitride (GaN) and silicon carbide (SiC) offer both RB capability and low conduction loss that make them appealing candidates for increasing the CSI’s efficiency. This paper proposes a new modulation scheme for an emerging three-phase CSI topology (H7-CSI) to make it compatible with BD switches to achieve higher efficiency compared to the conventional H6-CSI topology. In addition, the modulation strategy combined with the topology can noticeably reduce the conducted CM EMI. Analysis, simulation and experimental results confirm the advantages of the proposed BD switch-enabled H7-CSI over conventional H6-CSIs.

To access the full research paper, click here: An H7 Current-Source Inverter using Wide Bandgap Bidirectional Switches to Achieve High Efficiency and Low Conducted Common-Mode EMI