Multi-winding motor driving system, variable-frequency electric driving system, pumping system and equipment

Abstract

The multi-winding motor driving system comprises a motor and a power unit. The motor is provided with a plurality of windings which are mutually independent. The power unit comprises a rectification unit and a plurality of inversion units, the plurality of inversion units are in one-to-one correspondence with the plurality of windings of the motor in number, and each inversion unit supplies power to a corresponding one of the plurality of windings of the motor. The pumping system comprises the multi-winding motor driving system and at least one plunger pump. The plunger pump and the multi-winding motor driving system are integrally installed together, and the plunger pump is driven by the motor. The transmission input shaft of the plunger pump is directly and mechanically connected with the transmission output shaft of the motor or indirectly and mechanically connected with the transmission output shaft of the motor through a clutch or a coupling. The fracturing equipment or well site equipment comprises the pumping system, a liquid feeding manifold arranged on one side of the plunger pump, a discharge manifold arranged at one or two ends of the plunger pump and the like.

Description

technical field [0001] The invention relates to the field of oil and gas field fracturing, in particular to a multi-winding motor drive system, a variable frequency electric drive system, a pumping system, fracturing equipment and well site equipment. Background technique [0002] In view of the fact that the global oil and gas development equipment is developing in the direction of "low energy consumption, low noise and low emission", the traditional fracturing equipment with diesel engines as the power source has been replaced by the electric drive fracturing equipment with electric motors as the power source. In the existing electrically driven fracturing equipment or well site equipment containing such as fracturing equipment, pumping equipment or cementing equipment, etc., a frequency converter is used to drive an electric motor, and the electric motor drives a plunger pump to work to transfer materials such as fracturing fluid, Cement slurry or pumped liquid is pressur...

AI Technical Summary

Problems solved by technology

The problem brought about is: the frequency converter and the motor are separated by a certain distance, and there are many wirings between the motor and the frequency converter, which need to be connected by the complete machine manufacturer or field workers.

In addition, there are situations in the prior art where multiple frequency converters share transformers and / or rectification units

In these cases, there are also problems caused by the inclusion of transformers.

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