Electricity: motive power systems – Automatic and/or with time-delay means – Time or with time-delay means
Patent
1986-05-19
1987-09-22
Dobeck, Benjamin
Electricity: motive power systems
Automatic and/or with time-delay means
Time or with time-delay means
318308, 318318, 417 1, H02P 104
Patent
active
046957790
ABSTRACT:
Method and apparatus for providing an electric motor such as used on an oil well pumping unit with stall protection. The system comprises means for generating a signal representative of motor speed and for establishing at least two stall speed set points corresponding to upper and lower stall speeds of the motor. Upon the motor speed signal reaching the upper speed set point for one time duration or the lower stall speed set point for a second short time duration, a motor control function is generated. The system may be used for motors having a plurality of operating modes. In this case, at least two stall condition suites, comprising at least two upper and lower stall speed set points as described above, are established corresponding to at least two motor modes, e.g., high torque and low torque modes. The motor winding leads are monitored to identify whether the motor is in the high torque or low torque mode and the appropriate stall condition suite selected.
REFERENCES:
patent: 3191114 (1965-06-01), Reed
patent: 3306210 (1967-02-01), Boyd et al.
patent: 3413535 (1968-11-01), Hubby
patent: 3515971 (1970-06-01), Joslyn et al.
patent: 3778694 (1973-12-01), Hubby et al.
patent: 4028601 (1977-06-01), Peterson
patent: 4245370 (1981-01-01), Baker
patent: 4322668 (1982-03-01), Trussler et al.
patent: 4470092 (1984-09-01), Lombardi
patent: 4504881 (1985-03-01), Wada et al.
Dobeck Benjamin
Sargent Oil Well Equipment Company of Dover Resources, Incorpora
LandOfFree
Motor protection system and process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motor protection system and process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor protection system and process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2060847