US 12,068,707 B2
Inverter circuits and electrical propulsion systems for eVTOL aircraft
Stephen Spiteri, San Jose, CA (US)
Assigned to ARCHER AVIATION, INC., San Jose, CA (US)
Filed by Archer Aviation, Inc., San Jose, CA (US)
Filed on Aug. 1, 2023, as Appl. No. 18/363,535.
Claims priority of provisional application 63/378,680, filed on Oct. 7, 2022.
Claims priority of provisional application 63/378,536, filed on Oct. 6, 2022.
Prior Publication US 2024/0120869 A1, Apr. 11, 2024
Int. Cl. H02P 27/08 (2006.01); B60L 15/06 (2006.01); B60L 15/38 (2006.01); B64D 27/24 (2024.01); H02M 7/5395 (2006.01); H02P 21/00 (2016.01)
CPC H02P 27/08 (2013.01) [B60L 15/06 (2013.01); B60L 15/38 (2013.01); B64D 27/24 (2013.01); H02M 7/5395 (2013.01); H02P 21/50 (2016.02); B60L 2200/10 (2013.01); B60L 2210/40 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A propulsion system for an aircraft, comprising:
an electrical motor configured to drive one or more propellers of the aircraft; and
a capacitor configured to stabilize a direct current (DC) bus voltage;
a first inverter circuit coupled to the capacitor and configured to convert the DC bus voltage on a first bus of the first inverter circuit to alternate current (AC) voltages to drive a first set of stator windings of the electrical motor, based on a first pulse width modulation (PWM) vector; and
a second inverter circuit coupled to the capacitor and configured to convert the DC bus voltage on a second bus of the second inverter circuit to AC voltages to drive a second set of stator windings of the electrical motor, based on a second PWM vector, wherein:
the first PWM vector and the second PWM vector are substantially equal and opposite vectors; and
the first set of stator wings and the second set of stator wings are shifted by substantially 180 degrees.