阅读说明：本技术 一种弧形驱动电机 (Arc-shaped driving motor ) 是由 常九健 宋廷伦 赛影辉 海滨 储亚峰 阴山慧 俞兆伟 于 2019-11-26 设计创作，主要内容包括：本申请公开了一种弧形驱动电机，属于电机技术领域。所述电机包括至少四个定子和一个转子；所述至少四个定子与转台设备的固定台面连接，所述至少四个定子采用错位排列方式安装，且所述至少四个定子之间两两对称；所述转子与所述转台设备的转动部分连接，所述至少四个定子中每个定子与所述转子之间存在间隙。本申请中，弧形驱动电机包括至少四个定子和一个转子，没有诸如齿轮、丝杠、摩擦轮等器件，省去了大量的中间传动环节，提高了系统的传动精度和传动效率。且由于至少四个定子与转台设备的固定台面连接，转子与转台设备的转动部分连接，且每个定子与转子之间存在间隙，说明可以将弧形驱动电机分成多块进行组装，减小了加工和运输难度。(The application discloses arc driving motor belongs to motor technical field. The motor comprises at least four stators and a rotor; the at least four stators are connected with a fixed table top of the rotary table equipment, the at least four stators are installed in a staggered arrangement mode, and the at least four stators are symmetrical in pairs; the rotor is connected to a rotating portion of the turntable device, and a gap exists between each of the at least four stators and the rotor. In this application, arc driving motor includes four at least stators and a rotor, does not have such devices as gear, lead screw, friction pulley, has saved a large amount of middle transmission links, has improved the transmission precision and the transmission efficiency of system. And because at least four stators are connected with the fixed table surface of the rotary table equipment, the rotor is connected with the rotating part of the rotary table equipment, and a gap exists between each stator and the rotor, the arc-shaped driving motor can be divided into a plurality of blocks to be assembled, and the processing and transportation difficulty is reduced.)

1. An arc-shaped driving motor is characterized in that the motor comprises at least four stators and a rotor;

the at least four stators are connected with a fixed table top of the rotary table equipment, the at least four stators are installed in a staggered arrangement mode, and the at least four stators are symmetrical in pairs;

the rotor is connected to a rotating portion of the turntable device, and a gap exists between each of the at least four stators and the rotor.

2. The electric machine of claim 1, wherein each stator comprises a core, coil windings, and a stator housing;

the coil winding is wound on the iron core, and the iron core and the coil winding are fixed in the stator shell;

the stator housing is connected with a fixed table top of the turntable device.

3. The motor of claim 2, wherein the stator housing includes at least two grooves, and wherein each stator is coupled to the stationary table of the turntable device through the at least two grooves of the stator housing.

4. The electric machine of claim 2 wherein said core and said coil windings are secured in said stator housing by epoxy casting.

5. The electric machine of claim 2 wherein the coil windings are wound on the core in a pattern spanning adjacent slots and a predetermined winding pattern.

6. The motor according to claim 1, wherein each of the stators is formed by pressing a predetermined number of cores, and a thickness of each of the cores is a predetermined thickness.

7. The electric machine of any of claims 1-5 wherein each stator is designed with a fractional slot configuration and comprises 11 poles and 10 slots.

8. The motor of claim 1, wherein said rotor comprises a plurality of permanent magnets and a back iron;

the permanent magnets are attached to the outer arc surface of the back iron, the outer arc surface is close to the four stators, and the rotor is connected with the rotating part of the rotary table device through the back iron.

9. The motor of claim 7, wherein the back iron includes at least one through hole, and the rotor is connected to the rotating part of the turntable device through the at least one through hole of the back iron.

10. The electric machine of claim 7 wherein the material of the back iron comprises silicon steel and the material of each of the plurality of permanent magnets comprises neodymium iron boron.

Technical Field

The application relates to the technical field of motors, in particular to an arc-shaped driving motor.

Background

At present, the transmission mode that traditional revolving stage adopted mainly includes: worm and gear transmission, friction transmission and torque motor coaxial installation transmission. These conventional transmission methods play a very important role in the development of large turntable devices.

However, the size of the motor is increased due to the larger and larger size of the large turntable device, and along with the increase of the size of the motor, the motor is inconvenient to process and transport, and the manufacturing cost of the motor is increased.

Disclosure of Invention

The application provides an arc driving motor, can solve motor processing among the correlation technique, transportation difficulty, and the higher problem of manufacturing cost. The technical scheme is as follows:

in one aspect, an arc-shaped drive motor is provided, the motor comprising at least four stators and a rotor;

the at least four stators are connected with a fixed table top of the rotary table equipment, the at least four stators are installed in a staggered arrangement mode, and the at least four stators are symmetrical in pairs;

the rotor is connected to a rotating portion of the turntable device, and a gap exists between each of the at least four stators and the rotor.

In some embodiments, each stator comprises a core, a coil winding, and a stator housing;

the coil winding is wound on the iron core, and the iron core and the coil winding are fixed in the stator shell;

the stator housing is connected with a fixed table top of the turntable device.

In some embodiments, the stator housing comprises at least two grooves, and each stator is connected with the fixed table of the turntable device through the at least two grooves of the stator housing.

In some embodiments, the core and the coil windings are secured in the stator housing by epoxy casting.

In some embodiments, the coil winding is wound on the core in a manner spanning adjacent slots and a predetermined winding manner.

In some embodiments, each of the stators is formed by pressing a predetermined number of cores, and a thickness of each of the cores is a predetermined thickness.

In some embodiments, each of the stators is designed in a fractional slot configuration and each of the stators includes 11 poles and 10 slots.

In some embodiments, the rotor comprises a plurality of permanent magnets and a back iron;

the permanent magnets are attached to the outer arc surface of the back iron, the outer arc surface is close to the four stators, and the rotor is connected with the rotating part of the rotary table device through the back iron.

In some embodiments, the back iron includes at least one through hole, and the rotor is connected to the rotating portion of the turntable device through the at least one through hole of the back iron.

In some embodiments, the material of the back iron comprises silicon steel, and the material of each of the plurality of permanent magnets comprises neodymium iron boron.

The technical scheme provided by the application can at least bring the following beneficial effects:

in the embodiment of the application, the arc-shaped driving motor can comprise at least four stators and one rotor, and other devices such as gears, lead screws, friction wheels and the like are not arranged, so that a large number of intermediate transmission links are omitted, and the transmission precision and the transmission efficiency of the system are greatly improved. And because at least four stators are connected with the fixed table top of the rotary table equipment, the rotor is connected with the rotating part of the rotary table equipment, and a gap exists between each stator and the rotor, the arc-shaped driving motor can be divided into a plurality of blocks for assembly, the processing and transportation difficulty is greatly reduced, the requirement of the development of large rotary table equipment on a novel transmission mode can be met, and the stable and high-precision operation of the large rotary table equipment is realized. In addition, at least four stators can be installed in a staggered arrangement mode and are symmetrically distributed in pairs, so that the radial attraction force between the stators and the rotor can be counteracted, and the high-frequency vibration and noise of the motor, which are generated by the radial force, are eliminated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an arc-shaped driving motor provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a rated torque per stator output provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a four stator misalignment output torque rating provided by an embodiment of the present application;

fig. 4 is a schematic view of a tooth slot structure of a stator provided by an embodiment of the present application;

fig. 5 is a schematic view of an internal structure of a stator provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a coil winding arrangement provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a stator casing according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another arc-shaped driving motor provided by the embodiment of the application;

fig. 9 is a schematic shape diagram of a permanent magnet provided in an embodiment of the present application.

Reference numerals:

1: stator, 2: a rotor;

11: core, 12: coil winding, 13 stator case, 21: permanent magnet, 22: back iron;

221: a through hole;

131: first groove, 132: a second groove.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an arc-shaped driving motor provided by an embodiment of the present application, see fig. 1, which includes at least four stators 1 and a rotor 2; the at least four stators 1 are connected with a fixed table top of the turntable equipment, the at least four stators 1 are installed in a staggered arrangement mode, and the at least four stators 1 are symmetrical in pairs; the rotor 2 is connected to the rotating part of the turntable device, and a gap exists between each stator 1 of the at least four stators 1 and the rotor 2.

In the embodiment of the application, the arc-shaped driving motor can comprise at least four stators and one rotor, and other devices such as gears, lead screws, friction wheels and the like are not arranged, so that a large number of intermediate transmission links are omitted, and the transmission precision and the transmission efficiency of the system are greatly improved. And because at least four stators are connected with the fixed table top of the rotary table equipment, the rotor is connected with the rotating part of the rotary table equipment, and a gap exists between each stator and the rotor, the arc-shaped driving motor can be divided into a plurality of blocks for assembly, the processing and transportation difficulty is greatly reduced, the requirement of the development of large rotary table equipment on a novel transmission mode can be met, and the stable and high-precision operation of the large rotary table equipment is realized. In addition, at least four stators can be installed in a staggered arrangement mode and are symmetrically distributed in pairs, so that the radial attraction force between the stators and the rotor can be counteracted, and the high-frequency vibration and noise of the motor, which are generated by the radial force, are eliminated.

It should be noted that for convenience of description, the drawings of the embodiments of the present application may be assembled by four stators 1 and one rotor 2, and the four stators are identical in structural form. Referring to fig. 1, two non-adjacent stators among four stators are symmetrically distributed at 180 °, so that a radial attraction force between the stator 1 and the rotor 2 can be offset, and high-frequency vibration and noise generated by the motor due to the radial force can be eliminated. And the phase difference between every two adjacent stators in the four stators is 87.1875 degrees, so that the cogging torque and the side end torque can be reduced to the maximum extent, and the torque fluctuation generated by the cogging torque and the side end torque can be reduced.

As an example, referring to fig. 2, the embodiment of the present application provides a schematic diagram of rated torque output of each stator, and as can be seen from fig. 2, each stator 1 generates a force of 30N · m at rated voltage and rated rotation speed, and through structural optimization of the motor, the torque ripple coefficient is 5%. Compared with the motor which is not optimized under the condition of the same output force, the torque fluctuation coefficient is about 1/3.

As an example, when the motor includes 4 stators 1, referring to fig. 3, the embodiment of the present application provides a schematic diagram of rated torque output by a misaligned arrangement of four stators 1. Under rated voltage and rotating speed, the four stators 1 output 120N m together, and through the dislocation arrangement of the positions of the stators 1, the moment fluctuation coefficient is 3 percent, which is reduced by 2 percent compared with the moment fluctuation coefficient arranged by a conventional method under the same condition.

As an example, the length of each stator 1 may be designed through finite element optimization, and the central angle of each stator 1 may be designed to be 54 ° through finite element analysis.

It should be noted that, because the length of each stator 1 can be designed through finite element optimization, and because the magnitude of the side end force is related to the length of the stator, the side end force can be greatly reduced by optimizing the length of the stator 1, so that the moment fluctuation caused by the side end moment can be reduced to the maximum extent.

As an example, the gap between each stator 1 and the rotor 2 may be a preset gap, which may be set in advance, for example, the preset gap may be 1.2mm, and the effective thickness of the motor may be 50 mm.

As an example, each stator 1 may be designed in a fractional slot configuration and each stator includes 11 poles and 10 slots.

It should be noted that, the number of slots per phase per pole is 3/8, the central angle of the coil pitch is 5 ° (i.e. 160 ° electrical angle), and the three-phase coils are different in spatial phase by 120 ° electrical angle. The stator slot opening size can adopt finite element optimization design, so that the cogging torque can be reduced to the maximum extent. Fig. 4 is a schematic diagram of a tooth slot structure of a stator provided in an embodiment of the present application, and table 1 is parameters of a tooth slot provided in an embodiment of the present application.

TABLE 1

b0	0.6
		b1	6
b2	7.8
		h0	0.5
h2	18

In some embodiments, each stator 1 may include a core 11, a coil winding 12, and a stator housing 13; the coil winding 12 is wound on the iron core 11, and the iron core 11 and the coil winding 12 are fixed in the stator housing 13; the stator housing 13 is connected to the stationary table of the turntable device.

As an example, each stator 1 may be formed by pressing a predetermined number of cores 11, and the thickness of each core 11 is a predetermined thickness.

It should be noted that the iron core 11 may be an arc-shaped silicon steel sheet. The preset number and the preset thickness can be set in advance according to requirements, the preset number can be 100, and the preset thickness can be 0.35mm (millimeter). That is, each stator 1 may be pressed from 100 silicon steel sheets having a thickness of 0.35 mm.

Since the iron core 11 may be an arc-shaped silicon steel sheet, each stator 1 may be in the shape of an arc-shaped stator, and when the motor includes four stators 1, the outer radius of each stator 1 may be 240mm, the inner radius may be 200mm, the central angle may be 54 °, and the outer arc length may be 226.2 mm.

It should be noted that the material model of the silicon steel sheet may be 35WW 270.

Referring to fig. 5, the embodiment of the present application provides a structure diagram of the inside of a stator, that is, a structure diagram of winding a coil winding 12 around a core 11. For convenience of explanation, the embodiment of the present application further provides a schematic diagram of a coil winding arrangement, see fig. 6.

As an example, the core 11 and the coil windings 12 are fixed in the stator case 13 by epoxy casting.

As an example, the coil winding 12 is wound on the core 11 in a manner crossing adjacent slots and a predetermined winding manner.

It should be noted that the preset winding manner may be from left to right, and the three-phase windings are respectively wound in the manner of aaaaaabbbbbbbbbcccc, where a represents winding in of the coil of phase a, a represents winding out of the coil of phase a, B represents winding in of the coil of phase B, B represents winding out of the coil of phase B, C represents winding in of the coil of phase C, and C represents winding out of the coil of phase C.

It should be further noted that, when the motor includes four stators 1, two stators 1 that are not adjacent to each other may be connected in parallel, where one group of stators 1 that are not adjacent to each other is controlled by using the circuit a, and the other group of stators 1 that are not adjacent to each other is controlled by using the circuit B. Wherein the circuit a and circuit B output voltages may be sine wave voltages having the same peak value, the same frequency, except that the initial phase of circuit a is pi/2 later than the initial phase of circuit B.

As an example, the coil winding 12 may be an enameled wire with a wire diameter of 0.5mm, and the coil is wound in a bifilar manner and has 60 turns.

Referring to fig. 7, the stator housing 13 includes at least two grooves, and each stator 1 is connected to the stationary table of the turntable device through the at least two grooves of the stator housing 13. The first groove 131 and the second groove 132 are illustrated in the drawings of the embodiments of the present application.

It should be noted that the at least two grooves may be U-shaped grooves, or grooves with other shapes. Each stator 1 can be positioned and positionally adjusted by means of a groove in the stator housing 13.

Referring to fig. 8, the rotor 2 includes a plurality of permanent magnets 21 and a back iron 22; the permanent magnets 21 are attached to the outer arc surface of the back iron 22, the outer arc surface is the surface close to the at least four stators 1, and the rotor 2 is connected with the rotating part of the rotary table device through the back iron 22.

As an example, referring to fig. 8, the back iron 22 includes at least one through hole 221, and the rotor 2 is connected to the rotating part of the turntable device through the at least one through hole 221 of the back iron 22.

It should be noted that the material of the back iron 22 may include silicon steel, the material of each permanent magnet 21 in the plurality of permanent magnets 21 may include neodymium iron boron, the material type of the permanent magnet 21 may be N38UH, the maximum height of the permanent magnet 21 may be 6mm, the remanence of the permanent magnet 21 may reach 1.2T, and the coercive force may reach 790 KA/m.

As an example, the rotor 2 may include 64-pole (32 pairs) permanent magnets 21, of course, as the motor increases, the number of the permanent magnets 21 included in the rotor 2 increases, and the shape of the permanent magnets 21 may be optimally designed by using a finite element method, for example, the shape of the permanent magnets 21 may be as shown in fig. 9. Because the shape of the permanent magnet 21 can be optimally designed by adopting a finite element method, the magnetic field in the air gap can be distributed in a sine rule, and the torque fluctuation generated by the motor can be reduced to the maximum extent.

In the embodiment of the application, the arc-shaped driving motor can comprise at least four stators and one rotor, and other devices such as gears, lead screws, friction wheels and the like are not arranged, so that a large number of intermediate transmission links are omitted, and the transmission precision and the transmission efficiency of the system are greatly improved. And because at least four stators are connected with the fixed table top of the rotary table equipment, the rotor is connected with the rotating part of the rotary table equipment, and a gap exists between each stator and the rotor, the arc-shaped driving motor can be divided into a plurality of blocks for assembly, the processing and transportation difficulty is greatly reduced, the requirement of the development of large rotary table equipment on a novel transmission mode can be met, and the stable and high-precision operation of the large rotary table equipment is realized. In addition, at least four stators can be installed in a staggered arrangement mode and are symmetrically distributed in pairs, so that the radial attraction force between the stators and the rotor can be counteracted, and the high-frequency vibration and noise of the motor, which are generated by the radial force, are eliminated.

The above-mentioned embodiments are provided not to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.