Electricity: motive power systems – Positional servo systems – With compensating features
Patent
1994-05-10
1995-11-21
Ip, Paul
Electricity: motive power systems
Positional servo systems
With compensating features
318640, 364476, 425149, 425135, B29C 4577, G05B 1101
Patent
active
054690382
ABSTRACT:
A method for compensating for variations in the operating efficiency of electric motors used in plastic processing machines. The current to the motor is continually monitored during all periods of operation to identify variations in the motor's actual efficiency as it relates to measurable machine performance. Normal operation of the electric motor is monitored to establish baseline current usage for the various periods of the operating cycle under given conditions. With a baseline established, variations in motor efficiency can be detected by monitoring the current during closed loop control of specific parameters and comparing the results to the baseline. Since the parameter is held constant by virtue of the closed loop, a deviation in current from the baseline indicates a change in efficiency. Based on the identified variance, the current to the motor during other (open loop) operations can be adjusted accordingly.
REFERENCES:
patent: 4060362 (1977-11-01), Wilson, III
patent: 4540359 (1985-09-01), Yamazaki
patent: 4772830 (1988-09-01), Kobari et al.
patent: 4837490 (1989-06-01), Neko
patent: 4847023 (1993-07-01), Neko
patent: 4851170 (1989-07-01), Shimizu et al.
patent: 4988273 (1991-01-01), Faig et al.
patent: 5030395 (1991-07-01), Kamiguchi et al.
patent: 5062785 (1991-11-01), Stroud, III et al.
patent: 5182716 (1993-01-01), Stroud, III et al.
patent: 5258918 (1993-11-01), Giancola
Cincinnati Milacron Inc.
Friskney Stephen H.
Ip Paul
LandOfFree
Method for compensating for efficient variations in an electric does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for compensating for efficient variations in an electric , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for compensating for efficient variations in an electric will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1139791