Benjamin T Webster

US Patent:

20210341544, Nov 4, 2021

Filed:

Apr 29, 2020

Appl. No.:

16/861375

Inventors:

- Endicott NY, US
Peter A. Carruthers - Ithaca NY, US
Andrew S. Clark - Binghamton NY, US
Arthur P. Lyons - Maine NY, US
Benjamin T. Webster - Lisle NY, US

Assignee:

BAE Systems Controls Inc. - Endicott NY

International Classification:

G01R 31/42
H02M 1/36
H02M 7/44

Abstract:

A fault detection system for a system having a single DC input and a plurality of A/C loads such as an electric or hybrid electric vehicle. A plurality of inverters convert DC to 3-phase A/C and supply A/C power to a corresponding individual A/C load. Each inverter includes a common mode current transformer and a controller. An individual corresponding common mode current transformer is coupled to the 3-phase A/C output of the inverter. An individual corresponding controller is coupled to the output of an individual corresponding common mode current transformer and is coupled to an individual corresponding A/C load. Each controller is configured to detect a fault at the individual corresponding A/C load and in the case of detection of a fault at an individual corresponding A/C load, the corresponding controller disables the A/C load.

US Patent:

20210344297, Nov 4, 2021

Filed:

Apr 29, 2020

Appl. No.:

16/861887

Inventors:

- Endicott NY, US
Peter A. Carruthers - Ithaca NY, US
Benjamin T. Webster - Lisle NY, US

Assignee:

BAE Systems Controls Inc. - Endicott NY

International Classification:

H02P 29/50
H02P 27/08
H02M 1/12
H02J 3/01
H03H 7/01

Abstract:

Passive filters, line replaceable units and a modular power supply are provided. The passive filter comprises an inductor and a diode bridge. The inductor has a first end and a second end. The first end is coupleable to a phase output of an inverter. The diode bridge comprises a first diode and a second diode. The anode of the first diode is coupled to the second end of the inductor and a cathode of the first diode is coupleable to a positive DC bus voltage. The cathode of the second diode is coupled to the second end of the inductor and the anode of the second diode is coupleable to a negative DC bus voltage. The passive filter output is coupleable to cable(s) for an AC electric machine. A reverse recovery charge of the diodes achieves a target DV/DT for an output voltage of the passive filter at operating temperatures.