US 9,813,009 B1
Active gate clamping for inverter switching devices using grounded gate terminals
Zhuxian Xu, Novi, MI (US); and Chingchi Chen, Ann Arbor, MI (US)
Assigned to FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Feb. 7, 2017, as Appl. No. 15/426,288.
Int. Cl. H02P 27/04 (2016.01); H02P 27/08 (2006.01); B60L 11/18 (2006.01); H02M 7/5395 (2006.01); H03K 17/567 (2006.01); H03K 17/687 (2006.01)
CPC H02P 27/08 (2013.01) [B60L 11/1803 (2013.01); H02M 7/5395 (2013.01); H03K 17/567 (2013.01); H03K 17/6872 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An inverter comprising;
a phase leg having series-connected upper and lower transistors adapted to be connected between a positive bus and a ground bus; and
upper and lower gate drive circuits supplying gate drive signals to the upper and lower transistors, respectively, and each including an active clamp for deactivating the upper and lower transistors, respectively;
wherein the transistors are comprised of semiconductor devices, each having respective gate, collector, and emitter terminals;
wherein each pair of gate and emitter terminals is adapted to provide an enhanced common source inductance therebetween; and
wherein each gate terminal is adapted to be tied to a ground voltage of the drive circuits.