| Abstract |
This paper presents a scalable design for up to 8 GaN transistors per switch in a three-phase motor drive.To minimize the layout related issues, a fully symmetrical 'butterfly' layout was considered. Anexperimental three-phase prototype with a total of 8 chips per switch was built to verify the concept.Due to the highly symmetrical nature, this work focuses on four half-bridges in parallel, i.e. 4 chips perswitch. For evaluation, the design is operated as a 100 kHz buck converter with 50\% duty cycle. At 24and 48 V output currents up to 100 and 60 A respectively are achieved reliably. Measured voltagetransition times of 6 ns for all devices and minimal variations between device's temperature (_) of 12 and 5 K for 24 V/100 A and 48 V/ 60 A respectively confirm a correct operation. |
