Kenneth W Jackson

US Patent:

57711615, Jun 23, 1998

Filed:

Jan 10, 1997

Appl. No.:

8/782477

Inventors:

Kenneth R. Jackson - Columbia MD
Stephen A. Lane - Cockeysville MD

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H02M 112
H02M 114

US Classification:

363 40

Abstract:

A supplementary DC power source is coupled to the DC link circuit of an active power line conditioner (APLC) for sustaining uninterrupted AC power to a load during the time interval needed for AC power restoration or for an alternate or a back-up AC source to be brought on line to power the load upon temporary or continued failure of an AC power source. The supplementary DC source is comprised of a rectifier circuit across which is connected a storage capacitor. A boost converter and an auctioneer diode are coupled between the storage capacitor and the DC link circuit so that when the DC link drops in voltage in response to a sag in the AC source voltage upon loss of the AC voltage source, the necessary power is provided by the storage capacitor and boost converter. A pair of fast acting switches are also coupled between the AC source and the power bus feeding the inverters to isolate the AC source from the APLC and the load upon loss of the AC source. When the back-up AC source is required and comes up to voltage and is synchronized with the APLC, the fast acting switches are again closed to connect the back-up AC source to the APLC and the load.

US Patent:

20190018076, Jan 17, 2019

Filed:

Jul 10, 2018

Appl. No.:

16/032040

Inventors:

- Bethesda MD, US
Cedric H. WU - Bethesda MD, US
Yongdan HU - Bethesda MD, US
Kenneth Michael JACKSON - Bethesda MD, US
Gregory Scott BRUCE - Bethesda MD, US
Wilbur LEW - Bethesda MD, US
Andrew Raymond MANDEVILLE - Bethesda MD, US
Duc HUYNH - Bethesda MD, US

Assignee:

LOCKHEED MARTIN CORPORATION - Bethesda MD

International Classification:

G01R 33/032
G01N 21/64
G01N 22/00

Abstract:

A magnetometer for magnetic detection includes a magneto-optical defect center material having at least one magneto-optical defect center; a radio frequency (RF) exciter system including a radio frequency (RF) excitation source; an optical excitation system including an optical excitation source; an optical detector configured to receive an optical signal based on light emitted by the magneto-optical defect center material due RF excitation and optical excitation provided to the magneto-optical defect center material via the RF excitation source and the optical excitation source, respectively; a magnetic field generator configured to generate a magnetic field detected at the magneto-optical defect center material; and a system controller.