Automatic load seeking control for a pumpjack motor

Details Automatic load seeking control for a pumpjack motor Automatic load seeking control for a pumpjack motor

1980-06-05

1984-05-01

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318771, 318806, H02P 528, H02P 132

Patent

active

044464150

ABSTRACT:
Method and apparatus for matching the power output of a high slip motor to the demand requirement of a pumpjack unit. The stators of the high slip motor are automatically connected in various different configurations to provide the optimum torque as required by the pumpjack unit due to the downhole pumping condtions. A novel control circuitry is connected between the motor starter and the motor stators. The control measures the power drawn by the stators and selects the most optimum configuration thereof for the load required by the pumpjack. This selection operates the motor in the lowest possible torque mode, which is considered the best electrical and mechanical operation of the pumpjack apparatus.

REFERENCES:
patent: 2203927 (1940-06-01), Rutherford
patent: 3935519 (1976-01-01), Pfarrer
patent: 4220440 (1980-09-01), Taylor et al.

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