RALPH RAYMOND FLAUGHER
Engineers in Allison Park, PA
License number
Pennsylvania PE052025E
Category
Engineers
Type
Professional Engineer
Address
Address
Allison Park, PA 15101
Professional information
System And Method For Parallel Control Of Variable Frequency Drives
US Patent:
2007003, Feb 15, 2007
Filed:
Aug 11, 2006
Appl. No.:
11/503327
Inventors:
Mukul Rastogi - Murrysville PA, US
Ronald Gaillot - Lower Burrell PA, US
Anthony Schneider - Monroeville PA, US
Ralph Flaugher - Allison Park PA, US
Yusuke Fukuta - Pittsburgh PA, US
Ronald Gaillot - Lower Burrell PA, US
Anthony Schneider - Monroeville PA, US
Ralph Flaugher - Allison Park PA, US
Yusuke Fukuta - Pittsburgh PA, US
International Classification:
H02P 7/00
US Classification:
318432000
Abstract:
A method for controlling at least two variable frequency drives connected in parallel. The method comprises, for each variable frequency drive, communicating a magnetizing current component value to a master controller, and receiving a speed demand, a flux demand, and an average magnetizing current component value from the master controller. The method also comprises determining a motor speed and a motor flux based on measurements of a stator voltage and current of a motor coupled to the variable frequency drive, determining a speed reference based on a torque current component value, and determining a flux reference based on the magnetizing current component value and the average magnetizing current component value. The method further comprises adjusting a torque current component based on the speed reference and/or adjusting a magnetizing current component based on the flux reference.
Apparatus And Methods For Input Protection For Power Converters
US Patent:
2014006, Mar 6, 2014
Filed:
Sep 6, 2012
Appl. No.:
13/605316
Inventors:
James Buckey - Lower Burrell PA, US
Ralph Flaugher - Allison Park PA, US
Shelby Chun - Mt. Lebanon PA, US
Naren Nagarur - Pittsburgh PA, US
Ralph Flaugher - Allison Park PA, US
Shelby Chun - Mt. Lebanon PA, US
Naren Nagarur - Pittsburgh PA, US
Assignee:
SIEMENS INDUSTRY, INC. - Alpharetta GA
International Classification:
H02H 7/10
US Classification:
363 50
Abstract:
Systems and methods in accordance with this invention provide a power converter including an input signal terminal, a first output signal at a first output signal terminal, and a controller. The controller is adapted to switch the first output signal from a first value to a second value, measure a voltage at the input signal terminal as a function of time, set a flag to a first flag value if the measured voltage falls below a predetermined value within a first predetermined time interval after the first output signal has been switched from the first value to the second value, otherwise set the flag to a second flag value, and save the flag in a memory. Numerous other aspects are also provided.
Dual Processor Power Supply
US Patent:
2009008, Mar 26, 2009
Filed:
Sep 23, 2008
Appl. No.:
12/235902
Inventors:
James A. Buckey - Lower Burrell PA, US
Ralph Raymond Flaugher - Allison Park PA, US
Ralph Raymond Flaugher - Allison Park PA, US
Assignee:
SIEMENS ENERGY & AUTOMATION, INC. - Alpharetta GA
International Classification:
G06F 1/26, G06F 9/305, G06F 9/30
US Classification:
713300, 712 37, 712 30, 712E09018, 712E09028
Abstract:
A power supply includes multiple power cells and a master control system in communication with each of the power cells. The master controller includes a control processor configured to receive power cell control information and a host in communication with the control processor wherein the host is configured to receive command and status information.