CN113872413A

CN113872413A - Two-phase octupole hybrid stepping motor

Info

Publication number: CN113872413A
Application number: CN202111255221.XA
Authority: CN
Inventors: 李文亮; 张喜臣; 吴志敢
Original assignee: Shanghai Moons Electric Co Ltd
Current assignee: Shanghai Moons Electric Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2021-12-31

Abstract

The invention relates to a two-phase eight-pole hybrid stepping motor which comprises a stator punching sheet, two-phase windings and a rotor punching sheet, wherein the stator punching sheet is provided with eight stator poles distributed along the circumferential direction, the rotor punching sheet is provided with n rotor teeth uniformly distributed along the circumference, n is 4 x (2 xk +1), k is an integer, and a stepping angle theta is 360 degrees/(4 xn). Compared with the prior art, the invention has the advantages that the number of teeth on the stator pole can be increased under the same size space, the utilization rate of the space is improved, and the like.

Description

Two-phase octupole hybrid stepping motor

Technical Field

The invention relates to a hybrid stepping motor, in particular to a two-phase eight-pole hybrid stepping motor.

Background

At present, the stepping motor is widely applied to motion control equipment such as textile equipment, printers, security equipment, numerical control processing equipment and the like, the automation degree of a factory is higher and higher, and the application occasions of the stepping motor are wider and wider.

The step angle of the conventional two-phase hybrid stepping motor is 1.8 degrees or 0.9 degrees at present, the conventional stepping motor cannot meet the application requirements of some occasions, for example, in order to increase the yield of textile equipment, the action speed of the equipment needs to be increased, and the speed increasing requirement of the equipment is difficult to meet by the motor with the original seat number under the condition that the structure size is not changed.

At present, 4 structures are needed for a stator pole of a motor with a step angle of 0.9 degrees, the space utilization rate is not high, and the output of the motor is not high.

Disclosure of Invention

The present invention is directed to a two-phase eight-pole hybrid stepping motor for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the invention can be realized by the following technical scheme:

according to one aspect of the invention, a two-phase eight-pole hybrid stepping motor is provided, and comprises a stator punching sheet, a two-phase winding and a rotor punching sheet, wherein the stator punching sheet is provided with eight stator poles distributed along the circumferential direction, the rotor punching sheet is provided with n rotor teeth uniformly distributed along the circumference, n is 4 x (2 xk +1), k is an integer, and a step angle theta is 360 degrees/(4 x n).

Preferably, the eight stator poles are divided into four groups, the first stator pole and the second stator pole are the first group, the third stator pole and the fourth stator pole are the second group, the fifth stator pole and the sixth stator pole are the third group, the seventh stator pole and the eighth stator pole are the fourth group, each pole is not repeatedly divided into groups, and the four groups are uniformly distributed along the circumference.

As a preferred technical solution, the four groups of stator poles are divided into two phases, the first group is a phase a, the second group is a phase B, the third group is a phase a, and the fourth group is a phase B, and each phase is wound with a group of windings connected in series.

As a preferred technical scheme, a slot center line or a tooth center line on each stator pole of the phase a is coincident with a center line of the stator pole, wherein the slot center line is adopted when the number of small stator teeth on the stator pole is even, and the tooth center line is adopted when the number of small stator teeth on the stator pole is odd.

As a preferred technical solution, a difference between a slot center line or a tooth center line on each stator pole of the phase B and a center line of the stator pole is a step angle θ, wherein the slot center line is used when the number of small stator teeth on the stator pole is even, and the tooth center line is used when the number of small stator teeth on the stator pole is odd.

As a preferable technical solution, in the a-phase winding, if the winding direction on the first stator pole is positive, the winding is reversely wound on the second stator pole, the winding is forwardly wound on the fifth stator pole, and the winding is reversely wound on the sixth stator pole.

In a preferred embodiment, in the B-phase winding, if the winding direction on the third stator pole is positive, the winding is performed in the reverse direction on the fourth stator pole, the winding is performed in the forward direction on the seventh stator pole, and the winding is performed in the reverse direction on the eighth stator pole.

As an optimal technical scheme, the stator punching sheet, the rotor punching sheet and the two-phase winding are arranged to form a step angle.

As a preferable technical scheme, k is 4, n is 9, and the step angle theta is 2.5 degrees; and four small stator teeth are arranged on each stator pole.

As a preferable technical scheme, k is 12, n is 100, and the step angle theta is 0.9 degree; each stator pole is provided with 11 stator small teeth.

Compared with the prior art, the invention can improve the utilization rate of the space under the space with the same number of teeth, and the structure is simpler because the original four tooth forms are changed into the two tooth forms.

Drawings

Fig. 1 is a schematic structural diagram of a stator punching sheet according to embodiment 1 of the present invention, where 1 is a first stator pole, 2 is a second stator pole, 3 is a third stator pole, 4 is a fourth stator pole, 5 is a fifth stator pole, 6 is a sixth stator pole, 7 is a seventh stator pole, 8 is an eighth stator pole, 9 is a stator small tooth, 10 is a slot, and 11 is a stator punching sheet;

fig. 2 is a schematic structural view of a rotor sheet according to embodiment 1 of the present invention, in which 12 is the rotor sheet and 13 is the rotor tooth;

FIG. 3 is a schematic diagram of the winding layout of patent example 1, wherein A + A-is phase A, and B + B-is phase B;

fig. 4 is a schematic structural diagram of a stator punching sheet according to the current design scheme of embodiment 1, where 14 is a conventional stator punching sheet.

Fig. 5 is a schematic structural view of a stator punching sheet in embodiment 2 of the present invention;

fig. 6 is a schematic structural diagram of a stator punching sheet according to the current design scheme of embodiment 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

Example 1

As shown in FIG. 1, the invention relates to a stator punching sheet 11, a rotor punching sheet 12, and two-phase windings A + A-and B + B-.

The stator punching sheet 11 is provided with eight stator poles which are uniformly distributed along the circumference, each stator pole is provided with four stator small teeth 9, the eight poles are divided into four groups, a first stator pole 1 and a second stator pole 2 are a first group, a third stator pole 3 and a fourth stator pole 4 are a second group, a fifth stator pole 5 and a sixth stator pole 6 are a third group, a seventh stator pole 7 and an eighth stator pole 8 are a fourth group, and the four groups are uniformly distributed along the circumference.

The four groups are divided into two phases, the first group is A phase, the second group is B phase, the third group is A phase, the fourth group is B phase, each phase is wound with a group of windings connected in series, as shown in figure 3, A + and A-are A phase, B + and B-are B phase.

In the phase a winding, if the winding direction on the first stator pole 1 is positive, the winding is reversely wound on the second stator pole 2, the winding is forwardly wound on the fifth stator pole 5, and the winding is reversely wound on the sixth stator pole 6. Similarly, in the phase B winding, if the winding direction on the third stator pole 3 is positive, the phase B winding is reversely wound on the fourth stator pole 4, forwardly wound on the seventh stator pole 7, and reversely wound on the eighth stator pole 8.

The center line of each slot 10 on the 4 poles of the a phase (the first stator pole 1, the second stator pole 2, the fifth stator pole 5, and the sixth stator pole 6) coincides with the center line of each pole, and the center line of each slot 10 on the 4 poles of the B phase (the third stator pole 3, the fourth stator pole 4, the seventh stator pole 7, and the eighth stator pole 8) differs from the pole center line by 2.5 °, as shown in fig. 1.

36 rotor teeth 13 are uniformly distributed on the rotor punching sheet 12. The stator punching sheet 11, the rotor punching sheet 12 and the winding are arranged to form a step angle of 2.5 degrees.

Comparing fig. 1 and fig. 4, the punching structure according to the new invention can make full use of the existing space, improve the performance of the motor, if the punching structure is designed by the existing design method as fig. 4, the punching structure will be unreasonable when there are four small stator teeth 9 on the stator poles, the notch of the power supply machine is too small, it can only be designed as the structure of three teeth on each pole, the space of the motor can not be fully utilized.

Compared with the stator punching sheet 11 in fig. 1 and the existing stator punching sheet 14 in fig. 4, under the condition that the number of teeth on the stator pole is the same, the structure of the stator punching sheet is simpler as the original four tooth-shaped arrangement structures are changed into the existing two tooth-shaped arrangement structures.

Summarizing the number of teeth n on the rotor sheet of the invention is 4 × (2 × k +1), wherein k is an integer and the step angle is θ ═ 360 °/(4 × n), when k takes different values, different n is obtained, then the stator sheet can be designed into 8 poles, the 8 poles are divided into four groups, two adjacent poles are in one group, the four groups are uniformly distributed along the circumference, the four groups are divided into two phases, the first group is phase a, the second group is phase B, the third group is phase a, the fourth group is phase B, each phase is wound with a group of windings connected in series, wherein the central lines of the grooves or teeth on the 4 poles divided into one phase are superposed with the central lines of the poles, and the central lines of the grooves or teeth on the 4 poles of the other phase are different from the central lines of the poles by a step angle θ. The invention proposes a design theory in which the number of rotor teeth is n ═ 4 × (2 × k +1), where k is an integer. The theory can be applied to all schemes that satisfy the number of rotor teeth, and is not limited to the design scheme with the step angle of 2.5 °.

The design method of the hybrid stepping motor theory expands the existing design method of the stepping motor, and can help a motor designer adjust and adjust the distribution of the rotor teeth according to the requirements of customers so as to meet the use of the customers.

Example 2

At present, the number of teeth of a rotor of a 0.9 ° stepping motor is n ═ 100, the motor satisfies the condition that the number of teeth on a rotor punching sheet is n × (2 × k +1), taking a 42.2mm motor as an example, for comparing a stator punching sheet 11 in fig. 5 with a stator punching sheet 14 in fig. 6, fig. 5 shows a structure in which 11 teeth are provided on stator poles, a first stator pole 1 and a second stator pole 2 are a first group, a third stator pole 3 and a fourth stator pole 4 are a second group, a fifth stator pole 5 and a sixth stator pole 6 are a third group, a seventh stator pole 7 and an eighth stator pole 8 are a fourth group, the fourth group is uniformly distributed along the circumference, the first group is an a phase, the second group is a B phase, the third group is an a phase, the fourth group is a phase, a group of windings connected in series are wound on each phase, the winding structure is shown in fig. 3, wherein the center lines of the teeth and the poles on the first stator pole 1, the second stator pole 2, the fifth stator pole 5, the sixth stator pole 6 of the a phase coincide, the tooth center lines and the pole center lines of the third stator pole 3, the fourth stator pole 4, the seventh stator pole 7 and the eighth stator pole 8 of the other phase are different by a step angle of 0.9 degrees.

The motor with the stator punching sheet 11 structure in the newly designed figure 5 has the advantage that the holding torque of the motor with the stator punching sheet 14 structure in the existing figure 6 is improved by 12 percent. The theory can be used for motors with other size structures of 0.9 degrees, is not limited to a motor with 42.2mm and a motor with an 11-tooth structure on a stator pole, and can design the number of the stator pole teeth of the motor with other step angles of 0.9 degrees according to the size.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a two-phase eight-pole hybrid stepping motor, includes stator punching (11), two-phase winding and rotor punching (12), its characterized in that, stator punching (11) be equipped with eight stator poles along the circumferencial direction distribution, rotor punching (12) be equipped with along the circumference evenly distributed n rotor teeth (13), wherein n is 4 x (2 xk +1), k is the integer, the step angle is theta 360 °/(4 xn).

2. A two-phase eight-pole hybrid stepping motor according to claim 1, wherein eight of said stator poles are divided into four groups, a first stator pole (1) and a second stator pole (2) are a first group, a third stator pole (3) and a fourth stator pole (4) are a second group, a fifth stator pole (5) and a sixth stator pole (6) are a third group, a seventh stator pole (7) and an eighth stator pole (8) are a fourth group, each of the poles is not repeatedly divided, and the four groups are uniformly distributed along the circumference.

3. A two-phase eight-pole hybrid stepping motor as claimed in claim 2, wherein said four sets of stator poles are divided into two phases, the first set is phase a, the second set is phase B, the third set is phase a, and the fourth set is phase B, each phase having a series winding wound thereon.

4. A two-phase eight-pole hybrid stepping motor according to claim 3, wherein a slot center line or a tooth center line on each stator pole of the a-phase coincides with a center line of the stator pole, wherein the slot center line is used when the number of small stator teeth on the stator pole is even, and the tooth center line is used when the number of small stator teeth on the stator pole is odd.

5. A two-phase eight-pole hybrid stepping motor according to claim 3, wherein a slot center line or a tooth center line of each stator pole of the B-phase is different from a stator pole center line by a step angle θ, wherein the slot center line is used when the number of stator teeth on the stator pole is even, and the tooth center line is used when the number of stator teeth on the stator pole is odd.

6. A two-phase eight-pole hybrid stepping motor according to claim 3, wherein if the winding direction on the first stator pole (1) is positive in the a-phase winding, the winding is performed in reverse on the second stator pole (2), in forward on the fifth stator pole (5), and in reverse on the sixth stator pole (6).

7. A two-phase eight-pole hybrid stepping motor according to claim 3, wherein if the winding direction on the third stator pole (3) is positive in the B-phase winding, the winding is performed in reverse on the fourth stator pole (4), in forward on the seventh stator pole (7), and in reverse on the eighth stator pole (8).

8. The two-phase eight-pole hybrid stepping motor according to claim 1, wherein the stator lamination (11), the rotor lamination (12) and the two-phase winding are arranged to form a step angle.

9. A two-phase eight-pole hybrid stepper motor as defined in claim 1, wherein k is 4, n is 9, and the step angle θ is 2.5 °; four small stator teeth (9) are arranged on each stator pole.

10. A two-phase eight-pole hybrid stepper motor as defined in claim 1, wherein k is 12, n is 100, and the step angle θ is 0.9 °; each stator pole is provided with 11 stator small teeth (9).