Outer rotor motor device with oblique angle magnetic steel

Abstract

The utility model belongs to the field of electromagnetic electric technology, and discloses an external rotor motor device with oblique angle magnetic steel, which comprises a rotor and a stator, the rotor comprises a rotor shell, oblique angle magnetic steel, a rotor fan and a rotor central shaft, the rotor fan and the oblique angle magnetic steel are fixedly arranged on the rotor central shaft, and the stator is arranged on the rotor shell. The rotor shell wraps the oblique angle magnetic steel, the rotor fan and the rotor center shaft; the stator comprises a stator iron core, a coil and a stator support, each stator tooth of the stator iron core is a straight slot winding, each stator tooth is wound with the coil, and the stator iron core is fixedly installed on the stator support. According to the utility model, the matching technology of the straight slot stator and the rotor with the oblique angle magnetic steel is used, so that the amplitude of harmonic waves can be effectively reduced, the vibration noise of the motor is reduced, which is equivalent to the traditional matching technology of the skewed slot stator and the right-angle magnetic steel, the winding equipment cost can be reduced by 20%, the winding efficiency is improved by 30%, the slot fullness rate is improved by 5-10%, and the motor efficiency is improved by 2%.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic and electric technology, and particularly relates to an electric motor device which can reduce production costs, improve production efficiency, and improve the motor efficiency by increasing the slot fill factor of the motor. Background Art

[0002] With the improvement of the power per unit volume, speed and efficiency of motors, the problems of motor vibration and noise become particularly prominent. Some manufacturers use the iron core skewing technology to reduce the harmonic amplitude, thereby reducing vibration and noise.

[0003] However, compared with the straight slot motor, the iron core skewing makes winding difficult, reduces the production efficiency by about 30%, reduces the slot fill factor by 5 - 10%, and at the same time, increases the production equipment cost by 20%. Content of the Utility Model

[0004] In order to solve the above technical problems existing in the prior art, the utility model provides an outer rotor motor device with beveled magnets, and its specific technical solutions are as follows:

[0005] An outer rotor motor device with beveled magnets includes a rotor and a stator. The rotor includes a rotor housing, beveled magnets, a rotor fan and a rotor central shaft. The rotor fan and the beveled magnets are fixedly installed on the rotor central shaft. The rotor housing wraps the beveled magnets, the rotor fan and the rotor central shaft. The stator includes a stator core, coils and a stator bracket. Each stator tooth of the stator core is a straight slot winding, and coils are wound on each stator tooth. The stator core is fixedly installed on the stator bracket.

[0006] Further, the stator bracket and the rotor central shaft are connected by interference fit through a front bearing and a rear bearing before and after, and are fixed by a rotor housing flange.

[0007] Further, an installation bushing is also provided at the end of the rotor central shaft.

[0008] Further, it also includes a controller module. The controller module includes controller electronics, a controller housing and a controller wiring port. The controller housing is fixedly installed at one end of the rotor housing. The controller electronics are installed in the controller housing. The controller wiring port is installed on the controller housing for leading out the wiring of the controller electronics. The controller module is used to control the operation of the motor device.

[0009] Further, the beveled magnet is a single-piece magnet.

[0010] Further, the beveled magnet includes an upper beveled magnet and a lower beveled magnet, and the upper beveled magnet and the lower beveled magnet are fixedly connected.

[0011] Further, the upper bevel magnet and the lower bevel magnet are cemented and connected.

[0012] Further, the bevel magnet includes an upper bevel magnet, a middle bevel magnet and a lower bevel magnet, and the upper bevel magnet, the middle bevel magnet and the lower bevel magnet are fixedly connected.

[0013] Further, the upper bevel magnet, the middle bevel magnet and the lower bevel magnet are cemented and connected.

[0014] In an outer rotor motor device with bevel magnets according to an embodiment of the present invention, the combination of such an outer rotor bevel magnet and an inner stator straight slot winding has the same function as the combination of an outer rotor right-angle magnet and an inner stator skewed slot winding. However, the production efficiency of the stator straight slot winding is improved, the slot filling rate is increased, and the motor efficiency is increased, resulting in a reduction in the overall cost of the motor and an increase in the cost performance. The cost of the bevel magnet only increases slightly during mold opening.

[0015] Advantages of the present invention: By using the matching technology of a straight slot stator and a rotor with bevel magnets, the present invention can effectively reduce the amplitude of harmonics and reduce the vibration and noise of the motor. Compared with the traditional matching technology of a skewed slot stator and a right-angle magnet, the cost of the winding equipment can be reduced by 20%, the winding efficiency can be increased by 30%, the slot filling rate can be increased by 5 - 10%, and the motor efficiency can be increased by 2%. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a traditional skewed slot stator core of the prior art;

[0017] Figure 2 is a schematic diagram of an outer rotor and a straight slot stator structure with bevel magnets according to an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of an efficient motor structure according to an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of a two-section bevel magnet according to an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of a three-section bevel magnet according to an embodiment of the present invention.

[0021] In the figure, 1. Rotor housing; 2. Bevel magnet; 201. Upper bevel magnet; 202. Middle bevel magnet; 203. Lower bevel magnet; 3. Rotor housing flange; 4. Stator winding; 5. Stator core; 6. Stator bracket; 7. Rotor fan; 8. Rotor central shaft; 9. Installation bushing; 10. Front bearing; 11. Rear bearing; 12. Controller electronic device; 13. Controller housing; 14. Controller wiring port. Detailed Embodiments

[0022] In order to make the purpose, technical solution and technical effect of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings of the specification and embodiments.

[0023] As Figure 1 shown, the existing traditional inclined slot iron core has a certain angular inclination with the axis, aiming to reduce harmonics and noise. However, it also brings difficulties in winding, reduces production efficiency, reduces the slot fill factor, and at the same time increases the cost of production equipment.

[0024] As Figure 2 shown, an outer rotor motor device with an inclined angle magnet of an embodiment of the present utility model includes a rotor and a stator. The rotor includes a rotor housing 1, an inclined angle magnet 2, a rotor fan 7 and a rotor central shaft 8. The rotor fan 7 and the inclined angle magnet 2 are fixedly installed on the rotor central shaft 8, and the rotor housing 1 is wrapped outside the inclined angle magnet 2, the rotor fan 7 and the rotor central shaft 8. The stator includes a stator core 5, a coil 4 and a stator bracket 6. Each stator tooth of the stator core 5 is a straight slot winding, and a coil 4 is wound on each stator tooth. The stator core 5 is fixedly installed on the stator bracket 6.

[0025] As Figure 3 shown, the stator bracket 6 and the rotor central shaft 8 are connected by interference fit through a front bearing 10 and a rear bearing 11, and are fixed by a rotor housing flange 3. The end of the rotor central shaft 8 also has a mounting bushing 9.

[0026] It further includes a controller module. The controller module includes controller electronics 12, a controller housing 13 and a controller connection port 14; the controller housing 13 is fixedly installed at one end of the rotor housing 1, the controller electronics 12 is installed in the controller housing 13, and the controller connection port 14 is installed on the controller housing 13 for leading out the wiring of the controller electronics 12. The controller module is used to control the operation of the motor device.

[0027] As Figure 4 shown, the inclined angle magnet 2 can be a whole piece of magnet, or can be composed of an upper inclined angle magnet 201 and a lower inclined angle magnet 203. The upper inclined angle magnet 201 and the lower inclined angle magnet 202 are composed by bonding, but bonding is not limited.

[0028] As Figure 5 shown, the inclined angle magnet 2 can also be composed of an upper inclined angle magnet 201, a middle inclined angle magnet 202 and a lower inclined angle magnet 203. The upper inclined angle magnet 201, the middle inclined angle magnet 202 and the lower inclined angle magnet 203 are composed by bonding, but bonding is not limited.

[0029] The above is only the preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Although the implementation process of the present utility model has been described in detail above, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An outer rotor motor device with an angled permanent magnet, comprising a rotor and a stator, characterized in that, The rotor comprises a rotor housing (1), an angled magnetic steel (2), a rotor fan (7) and a rotor central shaft (8), wherein the rotor fan (7) and the angled magnetic steel (2) are fixedly mounted on the rotor central shaft (8), and the rotor housing (1) is wrapped around the outside of the angled magnetic steel (2), the rotor fan (7) and the rotor central shaft (8); the stator comprises a stator core (5), a coil and a stator bracket (6), wherein each stator tooth of the stator core (5) is a straight slot winding, and each stator tooth is wound with a coil, and the stator core (5) is fixedly mounted on the stator bracket (6).

2. The outer rotor motor device with an angled permanent magnet according to claim 1, wherein The stator bracket (6) is connected to the rotor central axis (8) front and rear through interference fit via a front bearing (10) and a rear bearing (11), and is fixed via a rotor housing flange (3).

3. The outer rotor motor device with beveled magnetic steel according to claim 1, characterized in that: The end of the rotor central shaft (8) is also provided with a mounting bushing (9).

4. The outer rotor motor device with an angled permanent magnet according to claim 1, wherein The invention also includes a controller module, wherein the controller module includes a controller electronic device (12), a controller housing (13) and a controller wiring port (14); the controller housing (13) is fixedly mounted on one end of the rotor housing (1), the controller electronic device (12) is mounted in the controller housing (13), and the controller wiring port (14) is mounted on the controller housing (13) and is used to lead out wiring of the controller electronic device (12); and the controller module is used to control the operation of the motor device.

5. The outer rotor motor device with beveled magnetic steel according to claim 1, characterized in that: The bevel magnetic steel (2) is a whole piece of magnetic steel.

6. The outer rotor motor device with beveled magnetic steel according to claim 1, characterized in that: The beveled magnetic steel (2) comprises an upper beveled magnetic steel (201) and a lower beveled magnetic steel (203), and the upper beveled magnetic steel (201) and the lower beveled magnetic steel (203) are fixedly connected.

7. The outer rotor motor device with beveled magnetic steel according to claim 6, characterized in that: The upper bevel magnetic steel (201) and the lower bevel magnetic steel (203) are glue-connected.

8. The outer rotor motor device with an angled permanent magnet according to claim 1, characterized in that, The bevel magnetic steel (2) comprises an upper bevel magnetic steel (201), a middle bevel magnetic steel (202) and a lower bevel magnetic steel (203), wherein the upper bevel magnetic steel (201), the middle bevel magnetic steel (202) and the lower bevel magnetic steel (203) are fixedly connected.

9. The outer rotor motor device with angled magnetic steel according to claim 8, characterized in that: The upper bevel magnetic steel (201), the middle bevel magnetic steel (202) and the lower bevel magnetic steel (203) are glue-connected.

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