DC (direct current) motor controller

Abstract

The invention relates to a DC motor controller and solves the technical problem of providing a petroleum well oil pumping DC motor controller which, during working, can timely control the working current and the position of a carbon brush, achieve relatively uniform moment of force, be higher than an AC (alternate current) motor in speed service and be applicable to a high-load working status. According to the technical scheme, the DC motor controller comprises a controller, an inverter, a DC motor and a petroleum well oil pumping machine which are sequentially connected, wherein the controller is connected with a speed sensor. The DE motor controller achieves computer control, can start the DC motor, during working, can timely control the working current and the position of the carbon brush, achieve relatively uniform moment of force, be higher than the AC (alternate current) motor in speed service and be applicable to a high-load working status, and is electricity-saving, environmentally friendly, high in efficiency and advanced in control technology.

Description

technical field [0001] The invention relates to a DC motor controller. Background technique [0002] At present, at present, the motors used in oil well pumping are basically AC motors, which are characterized by relatively high constant speed efficiency, generally at 1500 rpm or 3000 rpm, in line with the division of n (3000 / n), It is the best working method for AC motors. However, the oil well is relatively deep and the load is relatively large. It is difficult to ensure that the working speed deviates from the above figures under the ideal speed state, and the application efficiency is relatively low. Moreover, the AC voltage generally fluctuates, which affects work efficiency. If the frequency conversion technology is used, the torque efficiency is better only within a certain range, which is not the effect advertised, and it cannot reach the same purpose of all torque efficiencies within the range of 1-3000 rpm. Contents of the invention [0003] The technical prob...

AI Technical Summary

Problems solved by technology

However, the oil well is relatively deep and the load is relatively large. It is difficult to ensure that the working speed deviates from the above figures under the ideal speed state, and the application efficiency is relatively low.

Moreover, the AC voltage generally fluctuates, which affects work efficiency.

If the frequency conversion technology is used, the torque efficiency is better only within a certain range, which is not the effect advertised, and it cannot reach the same purpose of all torque efficiencies within the range of 1-3000 rpm.

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