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Series connection and parallel connection methods of series motor stator winding

A technology for motor stator and stator winding, which is applied in the shape/style/structure of winding conductors, electric components, and the manufacture of motor generators, etc. It can solve the problems of inconsistent mechanical properties, inability to connect motors in series, and achieve consistent mechanical properties. , load distribution balance, the effect of reducing radial size

Active Publication Date: 2016-03-23
石家庄远见水泵制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key point of connecting the motors in series lies in the connection method of the stator windings of the two submersible motors. If the winding method of the stator windings is unreasonable, the mechanical properties such as the speed and torque of the two series connection motors will be inconsistent, and the mechanical properties such as the torque of the two series connection motors will not be consistent. Intended purpose of concatenation
Although the current series-connected motors can solve some problems in practical applications, there is still a big gap from the formation of real practical and mature products, and continuous improvement is needed

Method used

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  • Series connection and parallel connection methods of series motor stator winding
  • Series connection and parallel connection methods of series motor stator winding
  • Series connection and parallel connection methods of series motor stator winding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The two submersible motors connected in series realize the connection of the upper and lower motor shafts in a certain way in terms of mechanical structure, and the stator windings of the upper and lower submersible motors are connected in a special series connection. The serial expansion diagram of the stator windings of the upper and lower submersible motors is as follows: figure 1 shown.

[0025] When the upper and lower motors are connected in series, and the three-phase windings are connected in series in a star (Y-shape), when the stator winding of the upper motor is wound, each wire slot of the M group of winding wires is wound enough for the designed number of coil turns. , followed by winding the N groups of winding wires of the motor stator, among the N groups of winding wires, there is only one specially designated wire slot k (for example, the 14th wire slot in this embodiment), the number of winding turns in the ratio of the designed number of turns One le...

Embodiment 2

[0027] The two submersible motors connected in series realize the connection of the upper and lower motor shafts in a certain way in terms of mechanical structure, and the stator windings of the upper and lower submersible motors are connected in a special series connection. The serial expansion diagram of the stator windings of the upper and lower submersible motors is as follows: figure 2 shown.

[0028] When the upper and lower motors are connected in series and the three-phase windings are connected in delta (△) in series, there is only one specially designated slot q in the M groups of winding wires in the stator winding of the upper motor (for example, the 12th wire in the embodiment Slot) is less than the designed number of winding turns, and the remaining wire slots in the M group of winding wires are wound according to the designed number of turns. When the M group of winding wires in the stator winding of the upper motor are wound, the winding wires are led to the l...

Embodiment 3

[0030] The two submersible motors connected in series realize the connection of the upper and lower motor shafts in a certain way in terms of mechanical structure, and the stator windings of the upper and lower submersible motors are connected in a special parallel manner. The parallel expansion diagram of the stator windings of the upper and lower submersible motors is as follows: image 3 and Figure 4 shown.

[0031] When two submersible motors are connected in series up and down, a special winding method is adopted when the stator windings of the two motors are connected in parallel, and the M group of winding wires and the N group of winding wires in the stator windings of the upper and lower motors are exchanged for one turn, that is, the upper The winding wires of group M of the motor are wound one less turn, and the coil of this turn is moved to the winding wires of group N of the lower motor, and the winding wires of group N of the lower motor are wound one less turn...

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Abstract

The invention relates to series connection and parallel connection methods of a series motor stator winding. By using the methods, internal series connection and parallel connection of upper and lower submersible motor stator windings can be cleverly realized; the number of turns of each corresponding stator, a size of each phase current and phases are completely consistent and generated stator magnetic potential waves are the same so that mechanical properties of two motors are consistent and load distribution is balance. The series-connected lower motor has no individual outgoing cable so that a radial space size of the upper motor is not occupied and a radial size of the motor can be reduced maximumly.

Description

technical field [0001] The invention belongs to the field of submersible motors, and in particular relates to a series and parallel connection method of stator windings of a serially connected motor. Background technique [0002] In recent years, as the groundwater table has dropped, well drilling depths have also increased. Drilling costs will increase sharply with the increase of well depth and diameter. In order to save costs, the drilling diameter should be as small as possible under the condition of meeting the use requirements. This requires the submersible pump used to meet the requirements of high head, large power, small diameter requirements. A submersible motor with high power and small outer diameter can only be realized by lengthening the motor core, but the length of the motor shaft will also increase accordingly. When reaching a certain length, the motor shaft stiffness and critical speed will have a negative impact on the performance and reliability of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K15/00
CPCH02K3/28H02K15/00
Inventor 张顺明吴学志李凤元祁文格李玉增
Owner 石家庄远见水泵制造有限公司
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