JOHN I YKEMA
Engineers in Delaware
License number
Pennsylvania PE001002K
Category
Engineers
Type
Professional Engineer
Address
Address
2
Delaware
Media, PA 19063
Media, PA 19063
Professional information
Power Node Control Center
US Patent:
7076592, Jul 11, 2006
Filed:
Dec 17, 1998
Appl. No.:
09/213099
Inventors:
John I. Ykema - Media PA, US
Assignee:
SPD Technologies Inc. - Philadelphia PA
International Classification:
G06F 13/14, G05D 3/12
US Classification:
710305, 700286
Abstract:
An electrical modular power node comprising a power bus backplane containing a plurality of bus bars, at least some of which are connectable to at least one power source, each bus bar having a plurality of terminals at regular intervals along the bus bar, each terminal being in a standard position in a pattern with terminals from the other bus bars and all terminal patterns being in a standard orientation on the backplane, and a plurality of functional modules, each housing circuitry having at least one connector for a connection to at least one terminal on one of the bus bars.
Power Node Switching Center
US Patent:
7667938, Feb 23, 2010
Filed:
Dec 18, 2007
Appl. No.:
11/959055
Inventors:
John I Ykema - Media PA, US
John P. Barber - Kettering OH, US
Antonios Challita - Bellbrook OH, US
John P. Barber - Kettering OH, US
Antonios Challita - Bellbrook OH, US
Assignee:
SPD Electrical Systems - Philadelphia PA
International Classification:
H02H 3/00
US Classification:
361 62, 361 42
Abstract:
A circuit fault detector and interrupter which consists of parallel current conduction paths, including a path through a mechanical contactor and a path through a power electronics switch. A fault can be detected by a fault detection circuit within 50 microseconds of the occurrence of the fault, causing the mechanical contactor to be opened and the fault current to be commutated via a laminated, low-inductance bus through the power electronics switch. The power electronics switch is thereafter turned off as soon as possible, interrupting the fault current. The fault current can be interrupted within 200 microseconds of the occurrence of the fault, and the device reduces or eliminates arcing when the mechanical contactor is opened.
Graded Resistance Solid State Current Control Circuit
US Patent:
8614868, Dec 24, 2013
Filed:
Jun 7, 2012
Appl. No.:
13/490585
Inventors:
Robert Lawler - Philadelphia PA, US
John P. Barber - Kettering OH, US
John I. Ykema - Media PA, US
John P. Barber - Kettering OH, US
John I. Ykema - Media PA, US
Assignee:
SPD Electrical Systems, Inc. - Philadelphia PA
International Classification:
H02H 3/00
US Classification:
361 42, 361 8
Abstract:
A circuit fault detector and interrupter which consists of parallel current conduction paths, including a path through a mechanical contactor and a path through a power electronics switch having active feedback control. A fault can be detected by a fault detection circuit within 50 μS of the occurrence of the fault, causing the mechanical contactor to be opened and the fault current to be commutated via a laminated, low-inductance bus through the power electronics switch. The power electronics switch is thereafter turned off as soon as possible, interrupting the fault current and absorbing the inductive energy in the circuit. The fault current can be interrupted within 200 microseconds of the occurrence of the fault, and the device reduces or eliminates arcing when the mechanical contactor is opened.