US 12,438,475 B2
Performance enhanced brushless motor with virtual wye neutral point switching
Naison E. Mastrocola, Goshen, CT (US); and Steven A. Avritch, Bantam, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on May 10, 2023, as Appl. No. 18/315,044.
Prior Publication US 2024/0380335 A1, Nov. 14, 2024
Int. Cl. H02P 21/22 (2016.01); H02M 7/487 (2007.01); H02M 7/5387 (2007.01); H02P 25/03 (2016.01); H02P 25/16 (2006.01); H02P 27/06 (2006.01)
CPC H02M 7/487 (2013.01) [H02M 7/53871 (2013.01); H02P 21/22 (2016.02); H02P 25/03 (2016.02); H02P 25/16 (2013.01); H02P 27/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A motor drive system comprising:
a three-phase motor including a first phase lead including a first phase input end and a first phase neutral end, a second phase lead including a second phase input end and a second phase neutral end, and a third phase lead including a third phase input end and a third phase neutral end, each of the first phase neutral end, the second phase neutral end, and the third phase neutral end separated from one another;
a virtual neutral bridge inverter circuit including a first neutral switch pair connected at a first neutral connection node, a second neutral switch pair connected at a second neutral connection node, and a third neutral switch pair connected at a third neutral connection node,
wherein the first phase neutral end is connected to the first neutral connection node, the second phase neutral end is connected to the second neutral connection node, and the third phase neutral end is connected to the third neutral connection node,
wherein the virtual neutral bridge inverter circuit operates according to a dual-space vector modulation scheme including a first binary set that controls the first, second and third input lead switch pairs, and a second binary set that controls the first, second, and third neutral switch pairs.