US 12,235,301 B2
Methods and systems for electric propulsor fault detection
Jeffrey K. Petter, Williston, VT (US)
Assigned to BETA AIR LLC, South Burlington, VT (US)
Filed by BETA AIR LLC, South Burlington, VT (US)
Filed on Apr. 26, 2023, as Appl. No. 18/139,601.
Application 18/139,601 is a continuation of application No. 17/740,984, filed on May 10, 2022, granted, now 11,686,751.
Application 17/740,984 is a continuation in part of application No. 17/366,449, filed on Jul. 2, 2021, granted, now 11,353,511, issued on Jun. 7, 2022.
Prior Publication US 2023/0314493 A1, Oct. 5, 2023
Int. Cl. G01R 23/165 (2006.01); B60L 3/00 (2019.01); B64C 29/00 (2006.01); B64D 27/24 (2024.01); B64D 35/04 (2006.01); G01R 31/00 (2006.01); G01R 31/34 (2020.01)
CPC G01R 23/165 (2013.01) [B60L 3/003 (2013.01); B64C 29/0008 (2013.01); B64D 27/24 (2013.01); B64D 35/04 (2013.01); G01R 31/008 (2013.01); G01R 31/343 (2013.01); B60L 2200/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system comprising:
at least a first inverter configured to:
accept a direct current; and
power a first motor;
a first propulsor, wherein the first propulsor is configured to provide thrust;
the first motor operatively connected with the first propulsor; and
at least a monitoring circuit electrically connected with the direct current and configured to:
detect a ground fault in the first motor or first inverter, wherein detecting the ground fault includes detecting a frequency in the direct current within a specified range; and
control the direct current to the first inverter based on detecting the frequency within the specified range.