CN204046285U - A kind of magneto split stator - Google Patents

Abstract

The utility model relates to a split stator of a permanent magnet motor, which comprises a split stator core and a coil, the coil is wound inside the split stator core, and also includes a fastening ring, and the split stator core is assembled by at least three petals Composition, each petal is provided with complete teeth, complete slots and half slots; the stator core is tightened by a fastening ring; the split stator of the permanent magnet motor is set as a cylinder whose bottom circle diameter is smaller than the length. It can solve the problems of the traditional stator core manufacturing process, such as difficulty in off-line, long winding ends, high manufacturing cost, high heat generated by the coil, low motor efficiency and unfavorable long-term reliable operation. It can be widely used in permanent magnet brushless DC motors Or permanent magnet synchronous motor; the manufacturing and assembly process of the split stator of the permanent magnet motor is simple, the structure is compact, the cogging torque is small, and the winding end is short; its resistance is small, the heat loss is small, the efficiency is high, the maintenance is convenient, and the operation is reliable .

Description

A split stator of a permanent magnet motor

technical field

The utility model belongs to the technical field of electric motors, and relates to a split-lobe stator of a permanent magnet motor, in particular to a split-lobe stator of a permanent magnet motor suitable for the fields of petroleum industry, aerospace or electric power, or for downhole drilling and testing equipment.

Background technique

The permanent magnet motor is an electromagnetic device that uses the magnetic field generated by the permanent magnet as the medium to realize electromechanical energy conversion according to the law of electromagnetic induction. Compared with the traditional electric excitation motor, the permanent magnet motor has simple structure, high reliability and small size. , light weight, high efficiency, low temperature rise, etc., are widely used in various fields of national production; with the development of high-performance permanent magnet materials, permanent magnet motors gradually replace traditional electric excitation motors with their superior performance. It is widely used in industry, aerospace, electric power and other fields. The permanent magnet motor mainly includes two parts: the stator and the rotor. The stator structure of traditional permanent magnet motor mainly includes stator core, winding coil, insulation system and other parts; among them, stator core is an important part of permanent magnet motor, and its material is usually silicon steel with good magnetic permeability. The traditional manufacturing process is to first make silicon steel The sheet metal is directly punched out according to the shape of the iron core to produce tooth-shaped ring pieces, which are stacked and welded. After the stator core is formed, it is rolled off the assembly line as a whole; for traditional flat permanent magnet motors, this manufacturing process can meet the demand. However, in environments with extremely strict requirements on space dimensions, such as aerospace, petroleum industry and other fields, there are strict requirements on radial and axial dimensions, and permanent magnet motors can only use slender structures; under such requirements, traditional The manufacturing process of the advanced stator core is difficult to offline, the winding ends are long, the manufacturing cost is high, the heat generated by the coil is large, and the motor efficiency is low, which is not conducive to long-term reliable operation. Therefore, there is a need for a split stator of a permanent magnet motor and a manufacturing method thereof capable of solving the above-mentioned problems, so as to meet the needs of actual conditions.

Utility model content

The purpose of the utility model is to provide a split stator of a permanent magnet motor to solve the above-mentioned problems in the prior art and meet the needs of the actual situation.

In order to achieve the above object, the utility model provides a split stator of a permanent magnet motor on the one hand, including a split stator core and a coil, the coil is wound inside the split stator core, and also includes a fastening ring, the split stator The stator core is composed of at least three lobes, and each lobe is provided with complete teeth, complete slots and half slots; the stator core is tightened by a fastening ring; the permanent magnet motor split stator is set to have a bottom circle diameter Cylindrical less than the length.

In the above solution, preferably, the aspect ratio of the split stator of the permanent magnet motor, that is, the ratio of the length to the diameter of the bottom circle, is 6:1.

It is also preferable that the split stator core is composed of three lobes, and each lobe is provided with two complete teeth, one complete slot and two half slots.

It is also preferable that the outer side of each lobe of the split stator core is set as an arc-shaped outer circumference of one-third of the circumference, and the inner side thereof is set as an arc-shaped inner circumference of one-third of the circumference, The cross-section formed by the combination of the outer circumference and the inner circumference is fan-shaped.

It is also preferable that an inverted "concave" notch is provided on the outer circumference of each lobe of the split stator core.

It is also preferable that one end of the outer circumference of each lobe of the split stator core is provided with an assembling boss, and the other end is provided with an assembling groove matched therewith.

It may also be preferred that grooves are provided at the ends of the inner circumference of the core teeth.

It may also be preferred that the number of the fastening rings is two, which are respectively arranged at the two ends of the split stator core.

Another aspect of the utility model provides a manufacturing method of a split-lobe stator of a permanent magnet motor. First, a sufficient number of silicon steel sheets are prepared according to the axial length of the split-lobe stator core, and then silicon steel sheets are made according to the shape of each split-lobe stator core. The material is punched and formed, so that the left end of the silicon steel sheet protrudes from an assembly boss, and the right end has an assembly groove with the same shape as the step, so that the split stator core can be positioned and used when assembled into a whole; the yoke of the silicon steel sheet There is a weld seam in the center for welding; the tooth bottom of the silicon steel sheet, that is, the inner circumference, is slotted, which plays a role in positioning and fastening when the stator is laminated and assembled as a whole; The top slots are aligned, laminated as a whole, and then welded along the reserved weld seam to form each lobe of the split stator core; after the split stator core is formed, the wires are laid along its teeth, and then the split The stator core is assembled into a whole stator core.

In the above solutions, preferably, the assembled stator cores are fastened together by two fastening rings.

Compared with the prior art, the utility model has the following advantages:

A split stator of a permanent magnet motor and a manufacturing method thereof of the utility model can solve the difficulties in offline production of the traditional stator core manufacturing process in the prior art, long winding ends, high manufacturing cost, large heat generated by the coil, and low motor efficiency And the problems that are not conducive to long-term reliable operation can be widely used in permanent magnet brushless DC motors or permanent magnet synchronous motors; the manufacturing and assembly process of the split stator of the permanent magnet motor is simple, the structure is compact, the cogging torque is small, and The end of the winding is short; because the coil is shorter than the traditional stator, its resistance is small, the heat loss is small, the efficiency is high, and the maintenance is convenient, which can ensure the long-term reliable operation of the permanent magnet motor in a limited space environment, especially suitable for demanding volume requirements Permanent magnet motors used in the petroleum industry and aerospace; solve the design and processing problems of slender motors under special environmental requirements; the split stator adopts segmented off-line, which can effectively reduce the length of the coil end and greatly improve the efficiency of the motor ; Its split stator adopts a three-lobed segmented structure, and the manufacturing, offline and assembly processes are very simple, which can effectively reduce costs. It also makes maintenance simple and feasible, and improves the maintainability of the motor; the split electronic stator core is slotted and processed to make assembly simple and feasible, and can also reduce the cogging torque of the motor.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the structural representation of the split stator of permanent magnet motor of the present utility model;

Fig. 2 is the A-A sectional view of the split stator of the permanent magnet motor in Fig. 1;

Fig. 3 is the structural representation of the silicon steel sheet of the permanent magnet motor split stator of the utility model;

Fig. 4 is the structural representation of each petal of the split stator core of the permanent magnet motor split stator of the utility model;

Fig. 5 is a schematic diagram of the overall structure of the split stator core of the split stator of the permanent magnet motor of the present invention.

In the figure, 1 is a fastening ring, 2 is a coil, and 3 is a split stator core.

Detailed ways

In order to better understand the utility model, the utility model is described in detail below in conjunction with specific embodiments. It will, however, be evident that various changes and modifications can be made to the invention without departing from the broader spirit and scope of the invention as defined in the appended claims. Therefore, the following examples have an illustrative rather than a limiting meaning.

Example 1:

A split stator of a permanent magnet motor, comprising a split stator core 3 and a coil 2, the coil 2 is wound inside the split stator core 3, and also includes a fastening ring 1, the split stator core 3 is composed of at least three Each petal is assembled with complete teeth, complete slots and half slots; the stator core is tightened by the fastening ring 1; the split stator of the permanent magnet motor is set as a cylinder whose bottom circle diameter is smaller than the length shape.

Example 2:

A split stator of a permanent magnet motor, similar to Embodiment 1, the difference is that the split stator core 3 is composed of three lobes, each lobe is provided with two complete teeth, a complete slot and two half slot; the outside of each lobe of the split stator core 3 is set as an arc-shaped outer circumference of one-third of the circumference, and its inner side is set as an arc-shaped inner circumference of one-third of the circumference concentric with it, and the outer The cross-section formed by the combination of the circumference and the inner circumference is fan-shaped; the outer circumference of each lobe of the split stator core 3 is provided with an inverted "concave" notch; each lobe of the split stator core 3 One end of the outer circumference is provided with an assembly boss, and the other end is provided with a matching assembly groove; the core teeth are provided with a groove at the end of the inner circumference.

Example 3:

A split stator of a permanent magnet motor is similar to Embodiment 2, the difference is that the number of fastening rings 1 is two, which are respectively arranged at the two ends of the split stator core 3 . The aspect ratio of the split stator of the permanent magnet motor, that is, the ratio of the length to the diameter of the bottom circle, is 6:1.

Example 4:

A method for manufacturing a split stator of a permanent magnet motor. First, a sufficient number of silicon steel sheets are prepared according to the axial length of the split stator core 3, and then the silicon steel sheet is punched into shape according to the shape of each split stator core 3, so that A rectangular assembling boss protrudes from the left end of the silicon steel sheet, and a rectangular assembling groove identical in shape to the rectangular step is left at the right end, so that the split stator core 3 can be positioned for use when assembled into a whole; the center of the yoke of the silicon steel sheet leaves a There are welds for welding; the bottom of the teeth of the silicon steel sheet, that is, the inner circumference, has a rectangular groove, which plays a role in positioning and fastening when the stator is stacked and assembled; The rectangular slots are aligned, laminated as a whole, and then welded along the reserved weld seam to form each lobe of the split stator core 3; The split stator core 3 is assembled into a whole stator core.

Example 5:

A method for manufacturing a split stator of a permanent magnet motor is similar to Embodiment 4, except that two fastening rings 1 are used to fasten the assembled stator core together.

The split stator of the permanent magnet motor of the utility model and its manufacturing method, its three split stator cores 3 are combined into a whole stator core, tightened by the fastening ring 1, and the coil 2 is wound in the core slot. The traditional motor stator manufacturing method is to weld and form the stator core as a whole, and then roll off the assembly line as a whole. For the slender motor under special environmental requirements, because the motor is long and narrow, tooling and manual work are not easy to enter the inner hole of the stator core. It brings great difficulty, and even makes it impossible to go off the assembly line. While reducing the difficulty of off-line, it can also effectively shorten the length of the end of the coil 2 and improve the efficiency of the motor; there are small slots in the inner hole of the split stator core 3, which can not only play a role in process fixing, but also reduce the motor cogging torque; the utility model solves the design technology of the split stator of the slender permanent magnet motor. When the silicon steel sheet is manufactured, the silicon steel sheet is first punched and formed according to the shape of each core. As shown in Figure 3, a rectangular step protrudes from the left end of the silicon steel sheet, and a rectangular groove with the same shape as the step is left on the right end, so that it can be separated. The petal stator core 3 is used for positioning when assembled into a whole. The processing accuracy of the steps and grooves here must be strictly controlled to ensure that there are no gaps when the two are assembled; a weld seam is left in the center of the yoke of the silicon steel sheet for welding. There are rectangular slots on the bottom of the teeth of the silicon steel sheets, which play a role in positioning and fastening during the stator stacking and overall assembly; after the split stator core 3 is formed, the three split stator cores are laid separately along the teeth, and then the three split The stator core 3 is assembled into a whole stator core. This method makes it very simple to go off the assembly line. The split stator core 3 can be used directly without further processing after being manufactured; when the split stator core 3 is assembled, it is necessary to ensure that the rectangular steps fully extend into the groove , there is no gap between the two; the assembled stator core is fastened together by two fastening rings 1 to ensure the reliable use of the stator core.

Claims (8)

1. A split stator of a permanent magnet motor comprises a split stator core (3) and a coil (2), and the coil (2) is wound inside the split stator core (3), and is characterized in that: it also includes a tight The fixed ring (1), the split stator core (3) is composed of at least three lobes, and each lobe is respectively provided with complete teeth, complete slots and half slots; the stator core is passed through the fastening ring (1) Tightening; the split stator of the permanent magnet motor is set as a cylinder whose bottom circle diameter is smaller than the length. 2. The split stator of the permanent magnet motor according to claim 1, wherein the aspect ratio of the split stator of the permanent magnet motor, that is, the ratio of the length to the diameter of the bottom circle, is 6:1. 3. The split stator of permanent magnet motor as claimed in claim 1, characterized in that: the split stator core (3) consists of three lobes, each lobe is provided with two complete teeth, one complete slot and two half a slot. 4. The split-lobe stator of permanent magnet motor as claimed in claim 3, characterized in that: the outside of each lobe of the split-lobe stator core (3) is set as an arc-shaped outer circumference of one-third of the circumference, and its inner side It is set as an arc-shaped inner circumference of one-third of the circumference concentric with it, and the cross-section formed by the combination of the outer circumference and the inner circumference is fan-shaped. 5. The split stator of permanent magnet motor according to claim 4, characterized in that: the outer circumference of each lobe of the split stator core (3) is provided with an inverted "concave" notch. 6. The split-lobe stator of permanent magnet motor as claimed in claim 5, characterized in that: one end at the outer circumference of each lobe of the split-lobe stator core (3) is provided with an assembly boss, and the other end is provided with an assembly boss. The matching assembly groove. 7. The split-lobe stator of a permanent magnet motor according to claim 6, wherein a groove is provided at the end of the inner circumference of the core teeth. 8. The split stator of permanent magnet motor according to any one of claims 1-7, characterized in that: the number of the fastening rings (1) is two, which are respectively arranged on the split stator core (3) at both ends of the position.