ELECTRIC POWER SAVING DEVICE FOR MOTOR OF PUMP JACKS APPARATUS

摘要

An electric power saving device for motor of pump jack apparatus. The electric power saving device preferably detects current and voltage generated from a motor of the pump jack during the up stroke and down stroke and preferably converts the real-time load torque obtained using an AC amplifier and voltage converter. The electric power saving device preferably minimizes the counter electromotive force (Back-EMF) and preferably reduces consumption of electrical energy by automatically reducing speed in a heavy-load during an up stroke, while automatically increasing speed in un-load, during a down stroke. This is preferably done by converting real-time load torque obtained by torque formula and through the output value according to load torque in order to minimize Back-EMF.

主权项

1. An electric power saving device for motor of pump jack apparatus, comprising:
a current detector; a current amplifier and voltage converter; a voltage-current converter and an inverter; wherein said current detector is coupled between a motor of a pump jack and said current amplifier and voltage converter; wherein said current amplifier and voltage converter is coupled between said current detector and said voltage-current converter; wherein said voltage-current converter is coupled between said current amplifier and voltage converter and said inverter and wherein said inverter is coupled between said voltage-current converter and said motor of said pump jack.