John Kenneth Mackenzie
Electrician at Kaplan Dr, Raleigh, NC
License number
North Carolina 14631-L
Issued Date
Dec 1, 2016
Expiration Date
Nov 30, 2017
Category
Electrican
Type
Limited Classification
Address
Address
5313 Kaplan Dr, Raleigh, NC 27606
Phone
(919) 233-1747
Professional information
Push-Pull Inverter With Snubber Energy Recovery
US Patent:
2006009, May 4, 2006
Filed:
Nov 3, 2004
Appl. No.:
10/980006
Inventors:
Julius Liptak - Knightdale NC, US
Mark Kocher - Raleigh NC, US
John MacKenzie - Raleigh NC, US
Mark Kocher - Raleigh NC, US
John MacKenzie - Raleigh NC, US
International Classification:
H02H 7/122
US Classification:
363056020
Abstract:
An exemplary power inverter comprises a push-pull inverter circuit that includes a transformer having a primary winding coupled to a DC bus and a secondary winding coupled to an AC bus, main power switches coupling each end of the primary winding to a DC return, and one or more supplemental power switches coupling at least one end of the primary winding to a snubber bus. The supplemental switch at a given end of the primary winding forms a buck-mode converter in combination with the primary winding and the associated free-wheeling diode at that end of the primary winding, and can be controlled by a switching controller to effect energy transfer between the snubber bus and DC bus. The switching controller can be configured to control power flow between the DC, AC, and snubber buses by controlling the common-mode and differential-mode voltages of the primary winding via main/supplemental power switch control.
Microcontroller Operated Current Limited Switching Power Supply For Circuit Protective Devices
US Patent:
8237419, Aug 7, 2012
Filed:
Feb 27, 2009
Appl. No.:
12/380484
Inventors:
Jeremy D. Schroeder - North Liberty IA, US
John K. Mackenzie - Raleigh NC, US
Brett Larson - Cedar Rapids IA, US
John K. Mackenzie - Raleigh NC, US
Brett Larson - Cedar Rapids IA, US
Assignee:
Schneider Electric USA, Inc. - Palatine IL
International Classification:
G05F 1/569, G05F 1/567, G05F 1/573
US Classification:
323277, 323276, 363 89
Abstract:
An AC to DC power supply for small heat sensitive electronic device. The power supply being dynamically controlled to operate symmetrically about the lowest point of the AC source voltage waveform for minimum excess heat production.