CN214755763U - Tooth yoke disconnect-type PMSM stator structure - Google Patents
Tooth yoke disconnect-type PMSM stator structure Download PDFInfo
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- CN214755763U CN214755763U CN202121190989.9U CN202121190989U CN214755763U CN 214755763 U CN214755763 U CN 214755763U CN 202121190989 U CN202121190989 U CN 202121190989U CN 214755763 U CN214755763 U CN 214755763U
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Abstract
The utility model provides a yoke of tooth disconnect-type PMSM stator structure, includes stator yoke portion and stator tooth portion, stator yoke portion and stator tooth portion are stamped through cold rolled silicon steel sheet and are folded and press the shaping, stator tooth portion on the outside be provided with a plurality of evaginations and encircle the stator tooth portion and arrange the stator tooth portion, the hole profile of stator yoke portion is formed by the concatenation of multistage circular arc line, connects through the line segment between the circular arc line, each section circular arc line corresponds one stator tooth on the stator tooth portion. The utility model discloses a hole profile of stator yoke portion is taken shape by the concatenation of multistage circular arc line, connects through the line segment between the circular arc line, and each section circular arc line corresponds one stator tooth portion on solve and piece together at present the stator structure and assemble the problem that the technology is complicated, full circle circularity is difficult to the assurance, can solve integral type stator structure again because of the internal diameter is less, the problem that the interior winding degree of difficulty is big. The structure greatly solves the winding problem, and meanwhile, the assembly is simple and the precision is higher.
Description
Technical Field
The utility model belongs to the technical field of the motor, especially, relevant with a tooth yoke disconnect-type PMSM stator structure.
Background
The submersible motor is not only the core part of the submersible screw pump oil production system, but also the subject of energy consumption. At present, the submersible screw pump driving motor at home and abroad is mainly an asynchronous motor. However, the submersible screw pump asynchronous motor has the disadvantages of high production cost, large energy consumption, low efficiency, short service life at high temperature and the like, and along with continuous deep exploitation of oil fields, the submersible screw pump oil production system driven by the asynchronous motor is difficult to adapt to complex well conditions such as high-viscosity oil, high-sand-content oil and the like due to high motor rotating speed. And another development direction of the submersible screw pump driving motor is a submersible screw pump permanent magnet synchronous motor, and compared with a submersible screw pump asynchronous motor, the submersible screw pump driving motor has the following advantages: the operation efficiency is high; the efficiency of the submersible screw pump asynchronous motor is lower, and the efficiency of the submersible screw pump permanent magnet synchronous motor is higher; the volume and weight of the submersible screw pump permanent magnet synchronous motor are smaller than those of a submersible screw pump asynchronous motor with the same capacity and pole number. Thus, the load of a mechanical system can be reduced in an actual installation, and the floor area of the submersible motor can be reduced. The rotating speed does not change along with the load, and the running stability is high. The speed difference exists between each section of rotor of the submersible screw pump asynchronous motor, the slip of each section of rotor is different when the section of rotor runs at the optimal working point due to the manufacturing process, but the whole motor is a shaft, so that each section of rotor is rigidly connected together and rotates at the same slip, some rotor units are overloaded, some rotor units are lightly loaded, and the motor cannot run at the optimal working point. The situation is even more severe if the load varies and the entire motor will be scrapped if the overloaded unit fails. In the working process of the submersible screw pump permanent magnet synchronous motor, as long as the power supply frequency is kept unchanged, the rotating speed of the submersible screw pump permanent magnet synchronous motor is also kept unchanged no matter how the load is changed, the rotating speeds of all sections of rotors are completely consistent, and the respective borne torques are also completely the same, so the running stability of the submersible screw pump permanent magnet synchronous motor is higher than that of the submersible screw pump asynchronous motor.
The control of the submersible screw pump permanent magnet synchronous motor is simpler than that of the submersible screw pump asynchronous motor, and the overload capacity of the submersible screw pump permanent magnet synchronous motor is larger than that of the corresponding asynchronous motor. The permanent magnet for the submersible screw pump permanent magnet synchronous motor replaces an electric excitation winding of the submersible screw pump asynchronous motor, so that the total power supply current is reduced, and the power supply quality of the whole power grid is improved. In conclusion, the submersible screw pump permanent magnet synchronous motor replaces a submersible screw pump asynchronous motor, so that efficiency can be improved, energy can be saved, and the submersible screw pump permanent magnet synchronous motor has important significance for building a conservation-oriented society.
Because of the special environment in the well, the submersible screw pump driving motor should be driven into the oil well with the inner diameter of the casing tube of 0.127-0.340m to drive the submersible screw pump to pump the crude oil, so the outer diameter is limited. In order to ensure that the motor has certain load capacity and has enough output power, the length of the motor can only be increased. The length-diameter ratio of the stator core of the ordinary motor is about 1 generally, while the length-diameter ratio of the stator core of the submersible screw pump motor is about 50 or even higher.
The traditional submersible screw pump motor generally adopts a two-pole three-phase squirrel-cage asynchronous machine with a slender structure, and is vertically arranged. The stator is composed of multiple sections of iron cores separated by nonmagnetic objects, namely, the stator is divided into multiple sections of structures, and the sections are not magnetically conducted. For ease of manufacture, the rotor is also divided into a number of segments with bearings placed between the rotor segments to prevent the stator and rotor from wandering. Long-term engineering practice shows that the asynchronous machine has the problems of uneven power distribution of each section of rotor, different slip ratios and the like, the complete independence of a mechanical structure is not realized, and the service life of the motor is greatly shortened. And the uniformity of the air gap of the motor is difficult to ensure, the stator and the rotor are easy to generate friction, and once the stator fails, the whole motor cannot work. The presence of the nonmagnetic regions also increases the end leakage reactance of the machine.
The submersible screw pump permanent magnet synchronous motor is characterized in that a unit combined permanent magnet motor is adopted to replace a super-long-length ratio motor in order to solve the problem that the process manufacturing caused by a super-long-thin ratio structure is difficult to realize, the traditional super-long-thin ratio motor is divided into a plurality of conventional small motors, the small motors are called unit motors, the unit motors are combined to run in parallel, the unit motors are independent, the heads and the tails of the unit motors are tightly connected together like a battery, and the submersible screw pump permanent magnet synchronous motor is equivalent to a large permanent magnet motor in efficiency. The screw pump direct-drive permanent magnet unit motor combination is simple and convenient to operate, the installation cost is saved, and the sectional structure not only simplifies the process, but also facilitates the coil inserting. However, due to the limitation of the pipe diameter of an oil well, the coil inserting of the permanent magnet synchronous motor of the submersible screw pump is still difficult, and needs to occupy quite long working hours, the split stator structure is convenient to wind, but the concentricity of the stator and the rotor is difficult to keep higher precision, and for a motor with a slender structure, the eccentricity between the stator and the rotor of the motor generates larger unilateral magnetic pulling force, so that the deflection of the motor is increased, the vibration and the noise of the motor are further caused, and the service life of the motor is further shortened. Therefore, a method which is convenient for inserting the motor off line, improves the production efficiency and ensures the quality of the motor is urgently needed to be provided.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned background art exists, the utility model provides a tooth yoke disconnect-type PMSM stator structure.
Therefore, the utility model adopts the following technical scheme: the utility model provides a yoke of tooth disconnect-type PMSM stator structure, includes stator yoke portion and stator tooth portion, characterized by, stator yoke portion and stator tooth portion punch through cold rolling silicon steel sheet and fold and press the shaping, the stator tooth portion on the outside be provided with a plurality of evaginations and encircle the stator tooth portion stator tooth that arranges, the hole profile of stator yoke portion is formed by the concatenation of multistage circular arc line, connects through the line segment between the circular arc line, each section circular arc line correspond one the stator tooth on the stator tooth portion.
As the supplement and improvement to the technical proposal, the utility model also comprises the following technical characteristics.
Stator slots are formed among the stator teeth, and insulating paper is arranged in the stator slots.
And insulating spacers matched with the stator teeth in profile are fixedly arranged at two end parts of the stator tooth part, the coil surrounds the stator teeth through the insulating spacers, and the stator teeth with the windings are inserted into the stator yoke along the inner circular arc of the stator yoke, so that the whole stator is assembled.
The utility model discloses following beneficial effect can be reached: the utility model discloses a hole profile of stator yoke portion is formed by multistage circular arc line concatenation, connects through the line segment between the circular arc line, and each section circular arc line corresponds one stator tooth portion on the stator tooth portion, can prevent that the stator tooth is rotatory along the circumferencial direction inside the stator yoke. The stator tooth part no longer adopts the structural style of present stator inner circle fluting, through designing into dentate structure, is similar to outer rotor permanent magnet synchronous machine's stator structure, and stator tooth number is according to required tooth's socket structure optimal design, solves the problem that present piece together the stator structure assembly technology is complicated, whole circle circularity is difficult to guarantee, can solve integral type stator structure again because of the internal diameter is less, the interior problem that the wire winding degree of difficulty is big. The structure greatly solves the winding problem, and meanwhile, the assembly is simple and the precision is higher.
Drawings
Fig. 1 is a schematic structural diagram of a stator yoke according to the present invention.
Fig. 2 is a schematic diagram of a stator tooth structure according to the present invention.
Fig. 3 is a schematic view of the matching structure of the stator yoke and the stator teeth of the present invention.
Fig. 4 is a schematic view of the structure of the insulating gasket of the present invention.
Fig. 5 is a schematic structural diagram of a stator with windings according to the present invention.
Fig. 6 is a schematic view of the stator assembly structure with windings according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the drawings, and the described embodiments are illustrative and explanatory of the present invention, and do not constitute the only limitations of the present invention.
As shown in fig. 1-6, the utility model discloses a stator yoke portion and stator tooth portion, stator yoke portion and stator tooth portion are folded through cold rolled silicon steel sheet punching and are folded and press and take shape, stator tooth portion on the outside be provided with a plurality of evaginations and encircle the stator tooth that stator tooth portion arranged, stator yoke portion's hole profile is formed by the concatenation of multistage circular arc line, connects through the line segment between the circular arc line, each section circular arc line corresponds one stator tooth portion on. Preferably, stator slots are formed between the stator teeth, and insulating paper is arranged in the stator slots. And insulating spacers matched with the stator teeth in profile are fixedly arranged at two end parts of the stator tooth part, the coil is wound on the stator teeth through the insulating spacers, and the stator teeth with the windings are inserted into the stator yoke along the inner circular arc of the stator yoke, so that the whole stator is assembled.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a tooth yoke disconnect-type PMSM stator structure, includes stator yoke portion and stator tooth portion, its characterized in that: the stator yoke and the stator tooth part are punched and laminated by a cold-rolled silicon steel sheet, a plurality of stator teeth which protrude outwards and are arrayed around the stator tooth part are arranged on the outer side of the stator tooth part, the inner hole profile of the stator yoke is formed by splicing a plurality of sections of arc lines, the arc lines are connected with one another through line segments, and each section of arc line corresponds to one stator tooth on the stator tooth part.
2. The stator structure of a permanent magnet synchronous motor with a split tooth yoke as claimed in claim 1, wherein: stator slots are formed among the stator teeth, and insulating paper is arranged in the stator slots.
3. The stator structure of a permanent magnet synchronous motor with a split tooth yoke as claimed in claim 2, wherein: and the two end parts of the stator tooth part are fixedly provided with insulating spacers matched with the stator tooth in profile, and the coil is wound on the stator tooth through the insulating spacers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121190989.9U CN214755763U (en) | 2021-05-31 | 2021-05-31 | Tooth yoke disconnect-type PMSM stator structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121190989.9U CN214755763U (en) | 2021-05-31 | 2021-05-31 | Tooth yoke disconnect-type PMSM stator structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214755763U true CN214755763U (en) | 2021-11-16 |
Family
ID=78626664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121190989.9U Active CN214755763U (en) | 2021-05-31 | 2021-05-31 | Tooth yoke disconnect-type PMSM stator structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214755763U (en) |
-
2021
- 2021-05-31 CN CN202121190989.9U patent/CN214755763U/en active Active
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