CN218867991U

CN218867991U - Stepping motor stator and stepping motor with same

Info

Publication number: CN218867991U
Application number: CN202223151380.8U
Authority: CN
Inventors: 彭光明; 林聪明
Original assignee: Shanghai Moons Electric Co Ltd
Current assignee: Shanghai Moons Electric Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-14
Anticipated expiration: 2032-11-25

Abstract

The utility model relates to a step motor stator and have step motor of this stator, step motor stator includes stator core, and this stator core includes eight stator main poles A1, A2, B1, B2, A3, A4, B3 and B4, and wherein stator main pole A1, A3, B1, B3 polarity are positive, and stator main pole A2, A4, B2, B4 polarity are negative, each stator main pole under the little tooth central line contained angle of stator be 45.0 in proper order, 45.9, 45.0, 44.1, 45.0, 45.9, 45.0 and 44.1, correspond A1, A2, B1 respectively, B1, B2, A3, A4, B3, B4 and B4, A1. Compared with the prior art, the utility model has the advantages of the magnetic resistance of motor reduces, and motor torque increases, and the loss of motor reduces.

Description

Stepping motor stator and stepping motor with same

Technical Field

The utility model relates to a step motor especially relates to a step motor stator and have step motor of this stator.

Background

In the conventional two-phase hybrid stepping motor with a step angle of 0.9 degrees, the structure of a stator core is shown in fig. 1;

in the existing stator core design scheme, the existing stator core 1 is designed to be 8 main poles, and a plurality of small stator teeth 2 are arranged under each main pole.

Wherein, the main poles of phase A are A1, A2, A3 and A4 respectively; the main poles of the B phase are B1, B2, B3 and B4 respectively;

the polarity of A1, A3, B1 and B3 is positive (+); the polarities of A2, A4, B2 and B4 are negative (-).

In order to meet the operation rule of the 0.9-degree stepping motor, the relative angle of the central line of the small teeth of the lower stator of each main pole is shown in table 1:

TABLE 1

In order to keep the slot area of the motor uniform, the included angle between 8 adjacent main poles is 45 degrees.

Under the design, the central lines of the main poles A1 and A3 are superposed with the central line of the small teeth of the lower stator of the main pole; the center lines of the rest main poles and the center lines of the small teeth of the lower stator of the main poles are not overlapped. The pole shoe portions of the main poles of the respective stators are appropriately extended to ensure that the slot width of the motor is B and the slot width is symmetrical about the center line of the slot.

Under the design idea, the motor stator iron core can not rotate, and the precision of the motor is influenced. Meanwhile, the maximum number of teeth of each main pole stator of the motor is set to be 10, and the torque of the motor is low.

SUMMERY OF THE UTILITY MODEL

The present invention aims to overcome the above-mentioned drawbacks of the prior art and to provide a stator for a stepping motor and a stepping motor having the same.

The purpose of the utility model can be realized through the following technical scheme:

As a preferable technical scheme, the small stator teeth under each main stator pole are symmetrically distributed around the center line of the main stator pole.

Preferably, the included angle between adjacent stator main poles is 45 degrees, and the areas of the stator slots defined between the adjacent stator main poles are the same.

Preferably, the minimum slot width defined between adjacent stator main poles is B0, the minimum slot is distributed between the main poles A1 and B4 and A3 and B2, and the angle defined by the center line of the stator small teeth under the main poles is minimum and is 44.1 °.

Preferably, the position of the main stator pole is fixed, the relative position of the small stator teeth under each main stator pole is fixed, and each small stator tooth is rotated clockwise by 0.45 degrees.

Preferably, the position of the center line of the slot defined by the stator main poles B2 and A3 and the stator main poles A1 and B4 is consistent with the position of the center line of the slot opening width B0 defined by the small stator teeth under the main poles.

Preferably, the stator main poles extend to the circumferential direction to form stator main pole shoes, and the stator slot width b1 defined by the stator small teeth on the lower part of each adjacent main pole is the same.

In a preferred technical scheme, a stator slot central line defined by each adjacent stator main pole is coincident with a stator slot central line defined by each adjacent stator main pole lower stator small tooth.

According to a preferable technical scheme, the outer frame of the stator core is circular or square, and if the outer frame of the stator core is square, the position of a screw hole is additionally arranged.

According to another aspect of the present invention, there is provided a stepping motor having a stator, including the stepping motor stator.

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

1) Due to the design of a short magnetic circuit, the magnetic resistance of the motor is reduced, the torque of the motor is increased, and the loss of the motor is reduced;

2) The stator can rotate by 180 degrees, so that the thickness difference of the stator core during lamination is eliminated, and the difficulty in manufacturing the motor is reduced;

3) When the motor stator is designed by 11 small stator teeth per main pole (in the drawings in the specification, for the sake of clarity, only a schematic diagram of 9 small stator teeth is drawn, and more than 9 small stator teeth are not shown in the drawings), the output torque of the motor is increased under the condition of ensuring the available notch width of the motor.

Drawings

Fig. 1 is a schematic structural diagram of a conventional stator core;

fig. 2 is a schematic structural view of a stator core of embodiment 1;

fig. 3 is a schematic structural view of a stator core according to embodiment 2;

fig. 4 is a schematic structural view of a stator core according to embodiment 3;

fig. 5 is a schematic structural view of a stator core according to embodiment 4;

fig. 6 is a schematic structural view of a stator core of embodiment 5;

wherein 1 is an existing stator core, 2 is a stator small tooth, 3 is a stator pole shoe extension, 4 is a first stator core of

embodiment

1, 5 is a second stator core of embodiment 2, 6 is a third stator core of embodiment 3, 7 is a stator main pole shoe extension, 8 is a fourth stator core of

embodiment

4, and 9 is a fifth stator core of embodiment 5.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

In embodiment 1, in the first stator core 4 shown in fig. 2 below, the stator small teeth under each stator main pole are symmetrically distributed about the stator main pole center line;

the distribution of 8 stator main poles is A1, A2, B1, B2, A3, A4, B3 and B4;

the polarities of A1, A3, B1 and B3 are positive (+);

the polarities of A2, A4, B2 and B4 are negative (-);

in order to meet the operation rule of the 0.9-degree stepping motor, the relative angle of the central line of the small teeth of the lower stator of each main pole is shown in table 2:

TABLE 2

In the design, the included angle between every 4 adjacent stator main poles is 180 degrees, the stator core can realize 180-degree rotation, and the precision of the motor is improved. However, the problem that the areas of the stator slots defined by the adjacent main stator poles are not consistent, so that the winding slot fullness of the motor is different, and the motor output is small is also solved.

Example 2

In example 2, in the second stator core 5 shown in fig. 3 below, in example 1, the position of the lower stator small teeth of the main pole is fixed, and the angle between the adjacent main poles is adjusted to 45 ° with respect to the A2 stator main pole

1) The stator slots defined between adjacent main poles of the stator have the same area

2) The minimum slot width defined between adjacent poles of the machine, B0, occurs between poles A1 and B4 and A3 and B2, with the minimum angle defined by the centerline of the stator teeth below the poles, 44.1.

3) The central line position of the slot is the central position of the winding nozzle in and out of the slot, and when the central line of the slot is inconsistent with the central line position of the notch, the winding efficiency of the motor is reduced.

Example 3

In embodiment 3, in the third stator core 6 shown in fig. 4 below,

on the basis of the embodiment 2, the position of the main pole of the stator is fixed, the relative position of the small teeth of the lower stator of each main pole of the stator is fixed, and each small tooth of the stator is rotated by 0.45 degrees clockwise.

2) The minimum slot width defined between adjacent main poles of the motor is B0 and occurs between main poles A1 and B4 and A3 and B2, and the angle defined by the center line of the small teeth of the stator below the main poles is the smallest and 44.1 °.

3) The positions of the center lines of the slots defined by the main poles B2 and A3 and the main poles A1 and B4 are consistent with the positions of the center lines of the slot openings B0 defined by the small teeth of the stators under the main poles.

The relative angle positions of the stator main pole and the stator small tooth central line under the stator main pole are as follows:

the A2 main pole and the Y axis are coincident, and the relative positions of other main poles are shown in Table 3:

TABLE 3

The A2 main pole and the Y axis are coincident, and the relative positions of the other main poles are shown in Table 4:

TABLE 4

Example 4

In example 4, in a fourth stator core 8 shown in fig. 5 below, in addition to example 3, stator main pole shoes are extended in the circumferential direction as appropriate;

1) Ensuring that the widths of stator notches defined by the small stator teeth under each adjacent main pole are the same and are b1;

2) The center line of the stator slot defined by each adjacent main pole is ensured to be coincident with the center line of the stator slot defined by the small stator tooth under each adjacent main pole.

Example 5

In example 5, as shown in fig. 6 below, in the stator core 9, the motor core outer frame was adjusted to be square in addition to examples 1 to 4, and the screw hole positions were increased.

Example 6

This embodiment also provides a stepping motor having a stator, including the stepping motor stator described in any one of embodiments 1 to 5.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A stepping motor stator comprises a stator core, wherein the stator core comprises eight stator main poles A1, A2, B1, B2, A3, A4, B3 and B4, the polarities of the stator main poles A1, A3, B1 and B3 are positive, and the polarities of the stator main poles A2, A4, B2 and B4 are negative, and the stepping motor stator is characterized in that the stator core comprises a stator core body and a stator core body;

the included angles of the central lines of the small teeth of the lower stator of the main pole of each stator are 45.0 degrees, 45.9 degrees, 45.0 degrees, 44.1 degrees, 45.0 degrees and 45.9 degrees in sequence, 45.0 deg. and 44.1 deg., corresponding to A1, A2, B1, B2, B2, A3, A4, B3, B4 and B4, A1.

2. The stator as claimed in claim 1, wherein the small teeth of the stator under each main pole of the stator are symmetrically distributed about the center line of the main pole of the stator.

3. The stator as claimed in claim 1, wherein the included angle between adjacent stator poles is 45 °, and the stator slots defined between adjacent stator poles have the same area.

4. A stator for a stepping motor according to claim 3, wherein a minimum notch width defined between adjacent stator poles is B0, the minimum notch is distributed between the main poles A1 and B4 and A3 and B2, and an angle defined by a center line of the stator small teeth under the main pole is a minimum of 44.1 °.

5. A stator for a stepping motor according to claim 3, wherein said stator main pole position is fixed, and the relative position of the stator small teeth under each stator main pole is fixed, and each stator small tooth is rotated clockwise by 0.45 °.

6. The stator of claim 5, wherein the position of the center line of the slot defined by the stator main poles B2 and A3 and the stator main poles A1 and B4 is identical to the position of the center line of the slot width B0 defined by the small stator teeth under the main poles.

7. The stator as claimed in claim 6, wherein the stator main poles extend circumferentially to each stator main pole shoe such that the stator slot width b1 defined by the stator teeth under each adjacent main pole is the same.

8. The stepping motor stator as claimed in claim 7, wherein a stator slot center line defined by each adjacent stator main pole coincides with a stator slot center line defined by each adjacent stator main pole lower stator small tooth.

9. The stator of claim 1, wherein the outer frame of the stator core is circular or square, and if square, screw holes are added.

10. A stepping motor having a stator, comprising the stepping motor stator according to any one of claims 1 to 9.