Electricity: motive power systems – Braking – Dynamic braking
Patent
1994-04-19
1996-01-16
Ip, Paul
Electricity: motive power systems
Braking
Dynamic braking
318 6, 7 34, H02P 500
Patent
active
054850665
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.
REFERENCES:
patent: 2427101 (1947-09-01), Kochli
patent: 2752044 (1956-06-01), Olcott
patent: 2759372 (1956-08-01), Hertrich
patent: 3504794 (1970-04-01), Tholl et al.
patent: 3906315 (1975-09-01), Gotisar
patent: 4118248 (1978-10-01), Lalcher
patent: 4223829 (1980-09-01), Bange
patent: 4443266 (1984-04-01), Schaper et al.
patent: 4482853 (1984-11-01), Bhausar
patent: 4519039 (1985-05-01), Surana et al.
patent: 4520450 (1985-05-01), Snedden et al.
patent: 4532597 (1985-07-01), Satiuddin et al.
patent: 4582097 (1986-04-01), Izzi et al.
patent: 4848673 (1989-07-01), Masuda et al.
patent: 4895733 (1990-01-01), Imanidis et al.
patent: 4947089 (1990-08-01), Abel
patent: 5044092 (1991-09-01), Journet et al.
patent: 5087864 (1992-02-01), Abel
patent: 5115575 (1992-05-01), Journet et al.
patent: 5132142 (1992-07-01), Jones et al.
patent: 5254241 (1993-10-01), Bange et al.
patent: 5346377 (1994-09-01), Bogue et al.
Ip Paul
Savannah Foods and Industries
LandOfFree
Variable speed centrifugal drive control for sugar refining mach does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable speed centrifugal drive control for sugar refining mach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable speed centrifugal drive control for sugar refining mach will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-311788