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Switched reluctance motor of directly-driven submersible screw pump

A technology of switched reluctance motors and electric shafts, which is applied in the direction of electrical components, electromechanical devices, magnetic circuit static parts, etc., can solve the problems of large power consumption, high loss, and insufficient motor utilization, and achieve reduced system costs and performance Reliable, Simple Effects

Inactive Publication Date: 2011-04-27
万奥普(北京)石油工程技术开发研究院有限公司 +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, kowtow machines are generally used in oil fields to drive reciprocating pumps for oil extraction operations. This method has disadvantages such as excessive power consumption, high loss, and insufficient utilization of the motor.

Method used

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  • Switched reluctance motor of directly-driven submersible screw pump
  • Switched reluctance motor of directly-driven submersible screw pump
  • Switched reluctance motor of directly-driven submersible screw pump

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Embodiment Construction

[0017] Such as figure 1 As shown in , the switched reluctance motor includes a motor casing 4, an upper joint 6 and a lower joint 5 arranged at both ends of the motor casing, and a stator 1, a rotor 2 and an electric shaft 3 arranged in the motor casing. The rotor 2 is composed of several subsections, and the subsections are a power generation structure composed of a stator and a rotor. The motor in the present invention is composed of 8 subsections, that is, 8 subsections connected in series. Such as figure 2 As shown, the rotor 2 is fixed on the electric shaft 3, and the stator 1 is arranged outside the rotor 2. The motor adopts a three-phase 6 / 4 structure, that is, the stator 1 is provided with three sets of symmetrically arranged stator teeth 1a, A, B, and C, and each stator tooth 1a is provided with a concentrated winding coil 1b, and two radially opposite coils They are connected in series to form a phase winding, and two sets of four rotor teeth 2a are arranged on th...

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Abstract

The invention discloses a switched reluctance motor, which comprises a stator, a rotor and an electric shaft, wherein the rotor is fixed on the electric shaft; the stator is arranged outside the rotor; the motor has a three-phase 6 / 4 structure; the stator is provided with three groups of stator teeth which are arranged radially oppositely; each stator tooth is provided with a centralized winding coil; two radially opposite coils are connected in series to form a winding; and the rotor is provided with two groups of rotor teeth, namely four rotor teeth. The switched reluctance motor has a simple structure, so that output power can be increased by increasing the axial lengths of the stator and the rotor or increasing the section number of a generating structure consisting of the stator and the rotor which are connected in series. Therefore, radial size of the motor can be reduced, the switched reluctance motor can be provided with a slender structure and is suitable for underground operation and the common prejudice that the switched reluctance motor cannot be applied to underground operation because of a large radial size in the prior art is changed.

Description

technical field [0001] The invention relates to a submersible motor, in particular to a submersible motor used in a direct-drive submersible screw pump. Background technique [0002] At present, the kowtow machine is generally used to drive the reciprocating pump in the oil field for oil extraction operations. This method has the disadvantages of excessive power consumption, high loss, and insufficient utilization of the motor. Submersible motors have been developed to this day, and have formed several series, which are widely used in various oil fields all over the world. The submersible motor drives the submersible centrifugal pump to extract underground crude oil, which is the most complicated part of the entire oil production system. At present, the motors used in submersible centrifugal pumps are two-pole three-phase squirrel-cage asynchronous motors. The length of a single section is between 1.5-10m, the high power adopts multi-section series connection, and differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K1/14H02K1/24H02K3/28
Inventor 张庆生刘建宏吴数
Owner 万奥普(北京)石油工程技术开发研究院有限公司
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