WO2022148340A1

WO2022148340A1 - Double-rotor hybrid stepping motor

Info

Publication number: WO2022148340A1
Application number: PCT/CN2022/070096
Authority: WO
Inventors: 彭光明; 金万兵; 林聪明
Original assignee: 上海鸣志电器股份有限公司
Priority date: 2021-01-08
Filing date: 2022-01-04
Publication date: 2022-07-14
Also published as: CN113922613A

Abstract

Provided is a double-rotor hybrid stepping motor, comprising an inner rotor iron core (9), an outer rotor iron core (10) and a third stator iron core (11), wherein an outer side of the third stator iron core (11) is provided with an outer stator main pole corresponding to the outer rotor iron core (10); an inner side of the third stator iron core (11) is provided with an inner stator main pole corresponding to the inner rotor iron core (9); the outer stator main pole and the outer rotor iron core (10) form an outer-rotor hybrid stepping motor; and the inner stator main pole and the inner rotor iron core (9) form an inner-rotor hybrid stepping motor. Compared with the prior art, the double-rotor hybrid stepping motor has the advantages of a low implementation cost, a wide application range, etc.

Description

A dual-rotor hybrid stepping motor

technical field

The invention relates to a stepping motor, in particular to a dual-rotor hybrid stepping motor.

Background technique

As shown in FIG. 1, the existing inner rotor hybrid stepping motor structure includes a first stepping motor stator core 1, a first stator winding (not shown) in the stator core slot, and a certain axial stagger. The first stepper motor rotor core 2 and the second stepper motor rotor core 3 of the angle lamination, and the first magnetic steel 4 in the middle of the rotor core (dotted line circle part);

As shown in FIG. 2, the existing outer rotor hybrid stepping motor structure includes a second stepping motor stator core 5, a second stator winding (not shown) in the stator core slot, and the axial direction is staggered by a certain angle. The laminated third stepping motor rotor iron core 6 and the fourth stepping motor rotor iron core 7, and the second magnetic steel 8 in the middle of the rotor iron core (dotted line circle part).

However, the above-mentioned inner rotor or outer rotor motor has a narrow scope of application, especially in the application of axial multi-layer motion, so it cannot be applied. Therefore, how to combine the inner rotor and the outer rotor to reduce the axial size of the motor and make it Applicable to the application of axial multi-layer motion, it has become a technical problem that needs to be solved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a dual-rotor hybrid stepping motor with low implementation cost and wide application range in order to overcome the above-mentioned defects of the prior art.

The object of the present invention can be realized through the following technical solutions:

According to one aspect of the present invention, a dual-rotor hybrid stepping motor is provided, comprising an inner rotor iron core, an outer rotor iron core and a third stator iron core, wherein an outer side of the third stator iron core is provided with an outer an outer stator main pole corresponding to the rotor iron core, and an inner stator main pole corresponding to the inner rotor iron core is arranged on the inner side of the third stator iron core;

The outer stator main pole and the outer rotor iron core form an outer rotor hybrid stepping motor; the inner stator main pole and the inner rotor iron core form an inner rotor hybrid stepping motor.

As a preferred technical solution, the motor is an internal and external two-phase dual-rotor hybrid stepping motor.

As a preferred technical solution, the outer stator has eight main poles, which are A1 to A4 of phase A and B1 to B4 of phase B; the inner stator has eight main poles, which are a1 of phase a. ～a4 and b1～b4 of b phase;

The eight outer stator main poles A1-A4 and B1-B4 and the outer rotor iron core form an outer rotor hybrid stepping motor;

The eight inner stator main poles a1-a4 and b1-b4 and the inner rotor iron core form an inner rotor hybrid stepping motor.

As a preferred technical solution, the motor is an inner two-phase and an outer three-phase dual-rotor hybrid stepping motor.

As a preferred technical solution, the outer stator main poles are twelve, which are A1-A4 of A-phase, B1-B4 of B-phase and C1-C4 of C-phase; the inner stator main pole is provided with eight main poles. a1 to a4 of phase a and b1 to b4 of phase b;

The twelve outer stator main poles A1-A4, B1-B4 and C1-C4 and the outer rotor iron core form an outer rotor hybrid stepping motor;

As a preferred technical solution, the motor is an inner three-phase and an outer two-phase dual-rotor hybrid stepping motor.

As a preferred technical solution, there are eight main poles of the outer stator, which are A1 to A4 of phase A and B1 to B4 of phase B; and twelve main poles of the inner stator, which are respectively of phase a. a1～a4, b1～b4 of b phase and c1～c4 of c phase;

The twelve inner stator main poles a1-a4, b1-b4 and c1-c4 and the inner rotor iron core form an inner rotor hybrid stepping motor.

As a preferred technical solution, the motor is an internal and external three-phase dual-rotor hybrid stepping motor.

As a preferred technical solution, the outer stator main poles are twelve, which are A1-A4 of A-phase, B1-B4 of B-phase and C1-C4 of C-phase; the inner stator main pole is provided with ten main poles. Two, respectively a1-a4 of a phase, b1-b4 of b-phase and c1-c4 of c-phase;

As a preferred technical solution, the third stator core slot is provided with a third stator winding.

Compared with the prior art, the present invention has the following advantages:

1) The realization cost is low, and the inner and outer double-rotor hybrid stepping motor shares a stator iron core, which greatly saves the manufacturing cost of the motor compared with the existing motor;

2) Wide range of applications, the inner and outer double rotor hybrid stepping motor is an extension of the radial dimension, and the axial dimension of the motor is shortened, which is suitable for applications where the axial dimension is limited and the axial multi-layer movement;

3) By changing the number of main poles of the inner and outer stators, the manufacture of various motors can be realized, which further improves the application scope of the motors.

Description of drawings

1 is a schematic structural diagram of an existing inner rotor hybrid stepping motor;

2 is a schematic structural diagram of an existing outer rotor hybrid stepping motor;

3 is a schematic structural diagram of an inner and outer two-phase dual-rotor hybrid stepping motor according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of an inner two-phase and an outer three-phase dual-rotor hybrid stepping motor according to Embodiment 2 of the present invention;

5 is a schematic structural diagram of an inner three-phase and an outer two-phase dual-rotor hybrid stepping motor according to Embodiment 3 of the present invention;

6 is a schematic structural diagram of an internal and external three-phase dual-rotor hybrid stepping motor according to Embodiment 4 of the present invention;

1 is the first stepping motor stator iron core, 2 is the first stepping motor rotor iron core, 3 is the second stepping motor rotor iron core, 4 is the first magnetic steel, and 5 is the second stepping motor stator iron Core, 6 is the third stepping motor rotor core, 7 is the fourth stepping motor rotor core, 8 is the second magnetic steel, 9 is the inner rotor core, 10 is the outer rotor core, 11 is the third stator iron core.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Example 1

As shown in FIG. 3, a dual-rotor hybrid stepping motor includes an inner rotor iron core 9, an outer rotor iron core 10 and a third stator iron core 11. The outer side of the third stator iron core 11 is provided with a The outer stator main pole corresponding to the outer rotor iron core 10, the inner stator main pole corresponding to the inner rotor iron core 9 is arranged on the inner side of the third stator iron core 11; the outer stator main pole and the outer rotor iron core are 10 constitutes an outer rotor hybrid stepping motor; the inner stator main pole and inner rotor iron core 9 constitute an inner rotor hybrid stepping motor.

The present invention combines the first stepping motor stator iron core 1 and the second stepping motor stator iron core 5 of the internal and external rotor hybrid stepping motor on the basis of the existing internal and external rotor hybrid stepping motor into one entity, that is, For the third stator iron core 11 in FIG. 3 , another inner and outer rotor iron core, magnetic steel and stator winding are not shown for simplicity.

The motor is an internal and external two-phase dual-rotor hybrid stepping motor.

The outer stator has eight main poles, which are A1 to A4 of the A phase and B1 to B4 of the B phase; the inner stator has eight main poles, which are respectively a1 to a4 of the a phase and a1 to a4 of the b phase. b1～b4; the eight outer stator main poles A1～A4 and B1～B4 and the outer rotor core 10 form an outer rotor hybrid stepping motor; the eight inner stator main poles a1～a4 and b1～ b4 and the inner rotor core 9 form an inner rotor hybrid stepping motor.

Example 2

As shown in Figure 4, the motor is an inner two-phase and an outer three-phase dual-rotor hybrid stepping motor.

The outer stator has twelve main poles, which are A1-A4 of A-phase, B1-B4 of B-phase and C1-C4 of C-phase; the inner stator has eight main poles, which are respectively a-phase a1-a4 and b1-b4 of phase b; the twelve outer stator main poles A1-A4, B1-B4 and C1-C4 and the outer rotor core 10 form an outer rotor hybrid stepping motor;

The eight inner stator main poles a1-a4 and b1-b4 and the inner rotor iron core 9 form an inner rotor hybrid stepping motor.

Example 3

As shown in Figure 5, the motor is an inner three-phase and an outer two-phase dual-rotor hybrid stepping motor.

The outer stator has eight main poles, which are A1 to A4 of phase A and B1 to B4 of phase B; the inner stator has twelve main poles, which are a1 to a4 of phase a and phase b. b1-b4 and c1-c4 of phase c; the eight outer stator main poles A1-A4 and B1-B4 and the outer rotor core 10 form an outer rotor hybrid stepping motor; the twelve inner stators The sub main poles a1-a4, b1-b4 and c1-c4 and the inner rotor iron core 9 form an inner rotor hybrid stepping motor.

Example 4

As shown in Figure 6, the motor is an internal and external three-phase dual-rotor hybrid stepping motor.

There are twelve main poles of the outer stator, which are A1 to A4 of the A phase, B1 to B4 of the B phase and C1 to C4 of the C phase; the inner stator has twelve main poles, which are respectively a phase a1-a4, b-phase b1-b4 and c-phase c1-c4; the twelve outer stator main poles A1-A4, B1-B4 and C1-C4 and the outer rotor core 10 form the outer rotor Hybrid stepping motor; the twelve inner stator main poles a1-a4, b1-b4 and c1-c4 and the inner rotor core 9 form an inner rotor hybrid stepping motor.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

A dual-rotor hybrid stepping motor is characterized by comprising an inner rotor iron core (9), an outer rotor iron core (10) and a third stator iron core (11), the third stator iron core (11) ) is provided with an outer stator main pole corresponding to the outer rotor iron core (10), and the inner side of the third stator iron core (11) is provided with an inner stator main pole corresponding to the inner rotor iron core (9);

The outer stator main pole and the outer rotor iron core (10) form an outer rotor hybrid stepping motor; the inner stator main pole and the inner rotor iron core (9) form an inner rotor hybrid stepping motor.
The dual-rotor hybrid stepping motor according to claim 1, wherein the motor is an inner and outer two-phase dual-rotor hybrid stepping motor.
The dual-rotor hybrid stepping motor according to claim 2, wherein the outer stator has eight main poles, which are A1-A4 of A-phase and B1-B4 of B-phase; There are eight main poles of the inner stator, which are a1-a4 of the a-phase and b1-b4 of the b-phase;

The eight outer stator main poles A1-A4 and B1-B4 and the outer rotor iron core (10) form an outer rotor hybrid stepping motor;

The eight inner stator main poles a1-a4 and b1-b4 and the inner rotor iron core (9) form an inner rotor hybrid stepping motor.
A dual-rotor hybrid stepping motor according to claim 1, wherein the motor is an inner two-phase and an outer three-phase dual-rotor hybrid stepping motor.
The dual-rotor hybrid stepping motor according to claim 4, wherein the outer stator has twelve main poles, which are A1-A4 of A-phase, B1-B4 of B-phase and C-phase respectively. There are eight main poles of the inner stator, which are a1 to a4 of the a phase and b1 to b4 of the b phase;

The twelve outer stator main poles A1-A4, B1-B4 and C1-C4 and the outer rotor iron core (10) form an outer rotor hybrid stepping motor;

The eight inner stator main poles a1-a4 and b1-b4 and the inner rotor iron core (9) form an inner rotor hybrid stepping motor.
A dual-rotor hybrid stepping motor according to claim 1, wherein the motor is an inner three-phase and an outer two-phase dual-rotor hybrid stepping motor.
The dual-rotor hybrid stepping motor according to claim 6, wherein the outer stator has eight main poles, which are A1-A4 of A-phase and B1-B4 of B-phase; There are twelve main poles of the inner stator, which are a1-a4 of the a-phase, b1-b4 of the b-phase and c1-c4 of the c-phase;

The eight outer stator main poles A1-A4 and B1-B4 and the outer rotor iron core (10) form an outer rotor hybrid stepping motor;

The twelve inner stator main poles a1-a4, b1-b4 and c1-c4 and the inner rotor iron core (9) form an inner rotor hybrid stepping motor.
A dual-rotor hybrid stepping motor according to claim 1, wherein the motor is an internal and external three-phase dual-rotor hybrid stepping motor.
The dual-rotor hybrid stepping motor according to claim 8, wherein the outer stator has twelve main poles, which are A1-A4 of A-phase, B1-B4 of B-phase, and C-phase. There are twelve main poles of the inner stator, which are a1-a4 of a phase, b1-b4 of b-phase and c1-c4 of c-phase;

The twelve outer stator main poles A1-A4, B1-B4 and C1-C4 and the outer rotor iron core (10) form an outer rotor hybrid stepping motor;

The twelve inner stator main poles a1-a4, b1-b4 and c1-c4 and the inner rotor iron core (9) form an inner rotor hybrid stepping motor.
A dual-rotor hybrid stepping motor according to claim 1, characterized in that a third stator winding is arranged in the slot of the third stator iron core (11).