Dwayne R Zeigler
Engineers in Savannah, GA
License number
Georgia PE021424
Issued Date
Aug 7, 1994
Renew Date
Dec 12, 2002
Expiration Date
Dec 31, 2004
Category
Engineers & Land Surveyors
Type
Professional Engineer
Address
Address
Savannah, GA
Professional information
Assistant Plant Manager At Louis Dreyfus Commodities
Position:
Assistant Plant Manager at Louis Dreyfus Commodities, Senior Project Manager at Imperial Sugar
Location:
Savannah, Georgia Area
Industry:
Food & Beverages
Work:
Louis Dreyfus Commodities
- Port Wentworth GA since Oct 2012
-
Assistant Plant Manager
Imperial Sugar
since Feb 2007
-
Senior Project Manager
Imperial Sugar Company
Mar 1987 - Feb 2008
-
Operations Manager
Education:
Georgia Institute of Technology 1982 - 1987
Variable Speed Centrifugal Drive Control For Sugar Refining Machines And The Like
US Patent:
5485066, Jan 16, 1996
Filed:
Apr 19, 1994
Appl. No.:
8/231221
Inventors:
Dwayne Zeigler - Savannah GA
Assignee:
Savannah Foods and Industries - Savannah GA
International Classification:
H02P 500
US Classification:
318375
Abstract:
A drive control system for a centrifugal used in, for example, a sugar refining operation, optimizes the deceleration and plow-out phases of its operation based on the torque characteristics of its particular drive motor. This is achieved by providing a centrifugal having a pulse-width modulated (PWM) frequency-modulated drive controlled by a programmable logic controller (PLC) running a ladder logic program. The ladder logic program implements a regenerative braking loop which complements the dynamic braking characteristic curve of the drive motor, thereby obtaining an optimal amount of braking torque for the motor over a wide range of motor revolutions or frequencies. Preferably, the system also implements a dynamic plow-out control for the motor when in plow-out mode to enable the centrifugal to be plowed-out in a minimal amount of time.
Ultrasonic Loading Control For Centrifuge Basket
US Patent:
5900156, May 4, 1999
Filed:
Jun 4, 1997
Appl. No.:
8/868920
Inventors:
Dwayne Zeigler - Port Wentworth GA
Assignee:
Savannah Foods and Industries - Savannah GA
International Classification:
B01D 17038, B01D 1712, G01N 924
US Classification:
210744
Abstract:
A loading control system for a centrifuge used in, for example, a sugar refining operation, optimizes the introduction of product to be centrifuged. A loading system has an ultrasonic loading probe, a sound tube for delivering the sound signals to the sugar wall and returning to the ultrasonic probe, an analog controllable feed valve and a programmable logic controller which is used to control the operation. The logic program implements a control loop which analyses the signal from the probe and controls the position of the gate accordingly. Preferably, the system also implements a control loop for automatic adjustment of the flow rate and amount of sugar in the machine in order to optimize the loading process.