An integrated rare earth permanent magnet variable frequency drive motor for pumping units

Abstract

The invention discloses an integrated rare-earth permanent magnet variable-frequency driving energy-saving motor for a pumping unit. The motor comprises a rare-earth permanent magnet motor, and further comprises a variable-frequency driving device, an intelligent control module, a remote communication module, a start-stop button, a change-over switch set, a switching power source, an intermediate relay set, an air switch, a contactor set, a wiring terminal and a current transformer. The variable-frequency driving device, the start-stop button, the change-over switch set, the intermediate relay set, the air switch, the contactor set, the wiring terminal and the current transformer are all mounted on a control cabinet, the intelligent control module, the remote communication module and the switching power source are all mounted on a fixed plate, and the switching power source is connected with the variable-frequency driving device, the intelligent control module and the remote communication module through the wiring terminal. Output can be adjusted according to different acting conditions, energy consumption can be reduced, impacts to a power grid can be reduced, power frequency and variable frequency automatic switching and motor protection functions are achieved, high networking capacity is achieved, and remote monitoring and maintenance are convenient.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an integrated rare-earth permanent magnet variable-frequency drive motor for a pumping unit, and is especially suitable for a beam pumping unit. Background technique [0002] At present, many oil fields in China's oil-producing areas are complex fault-block oil fields with low porosity and low permeability, and most of them use beam pumping units, commonly known as "kowtow pumps". Due to its mechanical characteristics, the motor is always switching between the motoring state and the power generation state, and the switching frequency is relatively high. When the motor is in the power generation state, the excess energy will be fed back to the grid, causing the voltage of the main circuit bus to increase, reducing the power supply quality of the grid, frequent impacts will also cause damage to the motor, affecting production efficiency, increasing maintenance costs, and causing maj...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide an integrated rare-earth permanent magnet variable-frequency drive motor for pumping units, which aims to solve the problems of low efficiency, serious line loss and variable loss of ordinary AC asynchronous motors in the prior art , the starting current is large, and the technical problem that has a great impact on the voltage fluctuation of the power grid can not only complete the motor drag, but also adjust the output according to the different work conditions of the pumping unit, reduce the loss of electric energy, and reduce the impact on the power grid; not only has Industrial frequency automatic switching and motor protection function, also has a strong networking capability, convenient for customers to carry out remote monitoring and maintenance

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