阅读说明：本技术 一种混合步进电机 (Hybrid stepping motor ) 是由 李文亮 张喜臣 吴志敢 于 2021-10-27 设计创作，主要内容包括：本发明涉及一种混合步进电机,包括定子冲片、转子冲片和两相绕组所述的定子冲片包括沿圆周分布的8个定子极,所述的转子冲片设有n个沿圆周均匀分布的转子齿,其中n＝2×k+1,k为整数,步距角为θ＝360°/(4×n)。与现有技术相比,本发明具有提高了电机空间的利用率等优点。(The invention relates to a hybrid stepping motor which comprises a stator punching sheet, a rotor punching sheet and two-phase windings, wherein the stator punching sheet comprises 8 stator poles distributed along the circumference, the rotor punching sheet is provided with n rotor teeth uniformly distributed along the circumference, n is 2 multiplied by k +1, k is an integer, and a step angle theta is 360 degrees/4 multiplied by n. Compared with the prior art, the motor has the advantages of improving the utilization rate of the motor space and the like.)

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

2. A hybrid stepping motor as claimed in claim 1, wherein said eight stator poles are divided into four groups, wherein said first stator pole (1) and said second stator pole (2) are a first group, said third stator pole (3) and said fourth stator pole (4) are a second group, said fifth stator pole (5) and said sixth stator pole (6) are a third group, said seventh stator pole (7) and said eighth stator pole (8) are a fourth group, each of said groups being non-repeating and wherein said four groups are uniformly circumferentially distributed.

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

4. A hybrid stepping motor as claimed in claim 3 wherein the slot or tooth centerline of one stator pole in each set is coincident with the stator pole centerline and the slot or tooth centerline of the other stator pole is different from the stator pole centerline by θ/2; the stator pole is provided with a plurality of stator small teeth, wherein a slot central line is adopted when the number of the stator small teeth on the stator pole is even, and a tooth central line is adopted when the number of the stator small teeth on the stator pole is odd.

5. A hybrid stepping motor as claimed in claim 4 wherein the two stator poles of the four sets are arranged in the same order in tandem.

6. A 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 reverse on the fifth stator pole (5), and in forward on the sixth stator pole (6).

7. A 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 reversed on the fourth stator pole (4), reversed on the seventh stator pole (7), and forward on the eighth stator pole (8).

8. The 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 hybrid stepper motor as defined in claim 1, wherein k is 37, n is 75, and the step angle θ is 1.2 °.

10. A hybrid stepping motor according to claim 1, wherein each of said stator poles is provided with 8 stator teeth (9).

Technical Field

The invention relates to a motor, in particular to a 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.

At present, the conventional stepping motors with the stepping angles of 1.2 degrees are all three-phase, and the positioning accuracy of the stepping motors is high relative to that of two-phase stepping motors with the stepping angles of 1.8 degrees, but the three-phase stepping motors have a fatal defect, because the three-phase stepping motors are generally powered on by two-phase windings when in operation, the torque of the motors can be reduced. This indicates that the positioning accuracy of the three-phase motor is improved while the space utilization is reduced.

Disclosure of Invention

The present invention is directed to a 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 an aspect of the present invention, a hybrid stepping motor is provided, including a stator lamination, a rotor lamination, and a two-phase winding, where the stator lamination includes 8 stator poles distributed along a circumference, the rotor lamination is provided with n rotor teeth uniformly distributed along the circumference, where n is 2 × k +1, k is an integer, and a step angle θ is 360 °/(4 × n).

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 grouped, 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 set of windings connected in series.

As a preferred technical scheme, the central line of a slot or a tooth on one stator pole in each group is superposed with the central line of a stator pole, and the difference between the central line of a slot or a tooth of the other stator pole and the central line of the stator pole is theta/2; the stator pole is provided with a plurality of stator small teeth, wherein a slot central line is adopted when the number of the stator small teeth on the stator pole is even, and a tooth central line is adopted when the number of the stator small teeth on the stator pole is odd.

As a preferable technical scheme, the front and back arrangement sequence of two stator poles in the four groups is consistent.

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, reversely wound on the fifth stator pole, and positively 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, and the winding is performed in the reverse direction on the seventh stator pole, and the winding is performed in the positive 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.

Preferably, k is 37, n is 75, and the step angle θ is 1.2 °.

As a preferable technical scheme, each stator pole is provided with 8 small stator teeth.

Compared with the prior art, the invention changes the three-phase winding structure into the two-phase winding structure, the step angles are the same, and the utilization rate of the motor space is improved; meanwhile, a new motor scheme can be obtained by adjusting the structure of the motor.

Drawings

Fig. 1 is a schematic structural diagram of a stator punching sheet of the present invention, in which 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 diagram of a rotor sheet of the present invention, wherein 12 is a rotor tooth, and 13 is a rotor sheet;

FIG. 3 is a schematic diagram of the arrangement of the windings of the present invention, wherein A + A-is phase A and B + B-is phase B;

fig. 4 is a schematic structural diagram of a stator punching sheet of the current design, wherein 14 is a conventional stator punching sheet.

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.

As shown in fig. 1, the present invention relates to a stator lamination 11, a rotor lamination 13, and a two-phase winding a phase and a B phase.

The stator punching sheet 11 is provided with eight stator poles which are uniformly distributed along the circumference, each stator pole is provided with eight 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 centerline of the slot 10 on one pole in each group coincides with the pole centerline, the centerline of the slot 10 on the other pole differs from the pole centerline by 0.6 °, as shown in fig. 1, the centerline of each pole of the first stator pole 1 in the first group, the third stator pole 3 in the second group, the fifth stator pole 5 in the third group, and the seventh stator pole 7 in the fourth group coincides with the slot centerline, and the slot centerlines of the second stator pole 2 in the first group, the fourth stator pole 4 in the second group, the sixth stator pole 6 in the third group, and the eighth stator pole 8 in the fourth group are offset from the pole centerline by 0.6 °.

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 4, A + A-is A phase, B + B-is 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, reversely wound on the fifth stator pole 5, and positively 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, reversely wound on the seventh stator pole 7, and positively wound on the eighth stator pole 8.

75 rotor teeth 12 are uniformly distributed on the rotor punching sheet 13. The stator punching sheet 11, the rotor punching sheet 13 and the winding are arranged to form a step angle of 1.2 degrees.

Comparing fig. 1 and fig. 4, it can be seen from fig. 4 that the existing stator punching 14 has nine poles, which is to average the number of poles of each phase to be equal, because the magnetic circuit of the stator punching is asymmetric when the profile is in a square structure, and therefore, the poles of the three-phase 1.2 ° stepping motor 9 need to be manufactured into a circular structure. The two-phase 1.2-degree stepping motor is not limited by the shape structure, can be made into the existing round shape, and can also be made into the conventional square profile, and the square profile which is convenient to process can be selected for technical processing.

When the motor runs, only two phases of the three-phase 1.2-degree stepping motor are electrified at each moment, three poles of nine poles are not electrified, the space of the motor cannot be fully utilized, the existing space can be fully utilized according to the structure of the stator punching sheet 11, and the performance of the motor is improved.

Summarizing the tooth number n on the rotor punching sheet of the invention is 2 xk +1, wherein k is an integer, the step angle theta is 360 °/(4 xn), when k takes different values, different n is obtained, at this time, the stator punching sheet can be designed into 8 poles, and the tooth number on each pole can be determined according to the size of the step angle, the space size and the process processing requirement. 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 an A phase, the second group is a B phase, the third group is an A phase, the fourth group is a B phase, each phase is wound with one group of windings connected in series, the central line of a slot or a tooth on one pole in each group is superposed with the central line of a pole, the central line of a slot or a tooth on the other pole is different from the central line of the pole by a step angle theta/2 of one half, the front and back sequence of the two pole shapes in each group is not unique, but the front and back arrangement sequence of the two pole shapes in the four groups is consistent, when the sequence is the same as that in the figure 1, the central line of the slot of one pole in each group is offset by the central line theta/2 of the pole clockwise, and when the sequence is opposite to that in the figure 1, the central line of the slot of one pole in each group is offset by the central line theta/2 of the pole anticlockwise.

The invention provides a design theory that the number of rotor teeth is n ═ 2 xk +1, wherein 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 1.2 °.

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.

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.