Magnetic flux leakage prevention rotor and disc-type electric motor

Abstract

The present invention relates to the technical field of electric motors, and in particular to a magnetic flux leakage prevention rotor and a disc-type electric motor. The magnetic flux leakage prevention rotor comprises: a main body and a plurality of magnetic members, which are arranged on the main body, wherein by using the center of the main body as the center of a circle, the plurality of magnetic members are distributed on the main body in a ring array, and the magnetic directions of two ends of the magnetic member are parallel to the movement direction of the main body; the main body is provided with a first surface and a second surface, and the plurality of magnetic members are arranged on the first surface; the second surface is provided with a leakage prevention structure, the first surface is configured to face an electromagnetic structure of a stator, and the leakage prevention structure is configured to prevent escape of magnetic field lines of the magnetic members when the magnetic field of the electromagnetic structure is increased; and the leakage prevention structure is prepared by means of transverse magnetization. In the present invention, the leakage prevention structure is arranged on the surface of the rotor facing away from the stator of the electromagnetic structure, and the magnetic field is also arranged on the surface of the rotor facing away from the electromagnetic structure of the stator by means of the leakage prevention structure, such that when the alternating magnetic field of the electromagnetic structure is suddenly increased, magnetic lines of force of the rotor cannot escape, thereby ensuring the normal operation of the electric motor.

Description

A magnetic flow anti-overflow rotor and disc motor Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a magnetic flux overflow prevention rotor and a disc motor. Background Art

[0002] The motor is mainly composed of a stator and a rotor. The stator generates an alternating magnetic field due to the flow of alternating current, which causes the rotor to rotate under the force of the alternating magnetic field, thereby achieving power output.

[0003] The principle of magnetic field change is somewhat similar to the flow of electric current. For example, when electric current has multiple channels, it will spontaneously flow from the channel with the lowest resistance, which is also the principle of short circuit. The magnetic field, on the other hand, is that when there is a magnetic field around a magnet, the distribution of the magnet's magnetic lines of force will spontaneously deform to a direction with a weaker magnetic field.

[0004] Based on the above principle, current motors will have the following phenomenon when in use: If the alternating current passing through the stator is greater than the rated current, the alternating magnetic field generated by the stator will be too large, causing the magnetic lines of force of the rotor magnet to be squeezed. Since the magnetic field is weakest at the end of the rotor magnet facing away from the stator, the magnetic lines of force of the rotor magnet will be squeezed in that direction, resulting in the larger the alternating magnetic field generated by the stator, the weaker the driving effect on the rotor; even when the alternating magnetic field generated by the stator reaches a certain value, the magnetic lines of force of the rotor magnet will disappear directly, resulting in performance collapse.

[0005] However, motors often experience sudden current surges due to various factors. In such cases, the motors often cease to function and must be restarted, disrupting normal production. Therefore, there is an urgent need for a solution that can maintain the performance of the motor rotor's magnets during sudden current surges. Summary of the Invention

[0006] The present invention aims to solve the problems of the prior art by providing a magnetic flux overflow prevention rotor and a disc motor. By adding an overflow prevention structure, there will be no position with a very weak magnetic field around the magnetic parts, thereby avoiding the escape of magnetic lines of force and the resulting performance breakdown.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The present invention provides a magnetic flux overflow prevention rotor, comprising a main body and a plurality of magnetic components disposed on the main body. The plurality of magnetic components are distributed in a circular array on the main body with the center of the main body as the center of a circle, and the magnetic directions of the two ends of the magnetic components are parallel to the direction of movement of the main body. The main body has a first surface and a second surface, the plurality of magnetic components are disposed on the first surface, and the second surface is provided with an overflow prevention structure. The first surface is used to face the electromagnetic structure of the stator, and the overflow prevention structure is used to prevent the magnetic field lines of the magnetic components from escaping when the magnetic field of the electromagnetic structure increases.

[0009] The anti-overflow structure is made by transverse magnetization.

[0010] Furthermore, the anti-overflow structure includes at least two anti-overflow magnets, at least two of which are distributed on the second surface along the rotation direction of the rotor, and adjacent anti-overflow magnets have the same poles facing each other; the anti-overflow magnets and the magnetic parts are arranged with the same poles.

[0011] Furthermore, two adjacent anti-overflow magnets are spaced apart from each other, and the same poles of the two adjacent anti-overflow magnets are both oriented toward the same extreme poles corresponding to the magnetic member.

[0012] Furthermore, the ratio of the number of the magnetic parts to the anti-overflow magnets is 1:3.

[0013] Furthermore, the first surface is provided with a first mounting groove, the second surface is provided with a second mounting groove, the magnetic component is installed in the first mounting groove, and the anti-overflow structure is installed in the second mounting groove.

[0014] The present invention also provides a disc motor, comprising a stator module and two rotors, wherein the stator module is disposed between the two rotors, and both rotors are rotatable relative to the stator module, wherein the rotor is the above-mentioned magnetic flux overflow prevention rotor.

[0015] Beneficial effects of the present invention: The present invention provides an anti-overflow structure on the side of the electromagnetic structure of the rotor facing away from the stator, and also sets a magnetic field on the side of the electromagnetic structure of the rotor facing away from the stator through the anti-overflow structure, so that when the alternating magnetic field of the electromagnetic structure suddenly increases, the magnetic lines of force of the rotor will not escape, thereby ensuring that the motor can work normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of Example 1.

[0017] FIG2 is a schematic diagram of another viewing angle of Example 1.

[0018] FIG3 is a schematic diagram of the magnetic component and the anti-overflow structure of Example 1.

[0019] FIG4 is a schematic diagram of Example 2.

[0020] Figure numerals: 1—main body, 2—magnetic part, 3—anti-overflow structure, 4—anti-overflow magnet, 5—first mounting slot, 6—second mounting slot, 7—stator module, 8—rotor. DETAILED DESCRIPTION

[0021] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings. Example

[0022] As shown in Figures 1 to 3, this embodiment provides a magnetic flux overflow prevention rotor 8, comprising a main body 1 and a plurality of magnetic members 2 arranged on the main body 1. With the center of the main body 1 as the center of a circle, the plurality of magnetic members 2 are distributed in a circular array on the main body 1, and the magnetic directions of the two ends of the magnetic members 2 are parallel to the movement direction of the main body 1; the main body 1 has a first surface and a second surface, the plurality of magnetic members 2 are all arranged on the first surface, and the second surface is provided with an overflow prevention structure 3, the first surface is used to face the electromagnetic structure of the stator, and the overflow prevention structure 3 is used to prevent the magnetic field lines of the magnetic members 2 from escaping when the magnetic field of the electromagnetic structure increases;

[0023] The anti-overflow structure 3 is manufactured by a transverse magnetization method, while the magnetic member 2 is manufactured by a longitudinal magnetization method.

[0024] Specifically, for ease of description, in this embodiment, the side of the magnetic part 2 facing the electromagnetic structure of the stator is referred to as the front side, and the other side is referred to as the back side. The present invention adds an anti-overflow structure 3 on the back side of the magnetic part 2, and the anti-overflow structure 3 also has magnetic properties, which is equivalent to building an anti-escape wall on the back side of the magnetic part 2. When the motor provided with the present invention is working, if the current suddenly increases and the alternating magnetic field generated by the electromagnetic structure of the stator suddenly increases, due to the provision of the anti-overflow structure 3, the magnetic lines of force of the magnetic part 2 will not escape to the back side due to being squeezed by the alternating magnetic field of the electromagnetic structure, that is, the magnetic lines of force of the magnetic part 2 will remain basically unchanged, thereby avoiding the performance collapse of the magnetic part 2 and causing the motor to stop rotating.

[0025] After testing, a motor equipped with the present invention and with a rated power of 3kW can still work normally when its real-time power suddenly increases to 10kW, confirming that the anti-overflow structure 3 can indeed prevent the magnetic lines of the magnetic part 2 from escaping to ensure normal operation.

[0026] In addition, the transverse magnetization method of the anti-overflow structure 3 of the present invention is also one of the core points of the present invention, which ensures that the magnetic field of the anti-overflow structure 3 is sufficiently stable to ensure that the magnetic part 2 does not experience magnetic line escape.

[0027] In this embodiment, the anti-overflow structure 3 includes at least two anti-overflow magnets 4, and at least two of the anti-overflow magnets are distributed on the second surface along the rotation direction of the rotor 8, and the same poles of adjacent anti-overflow magnets 4 are opposite to each other; the anti-overflow magnet 4 is arranged with the same pole as the magnetic part 2.

[0028] That is, in actual use, the ratio of the number of magnetic members 2 to the anti-overflow magnets 4 is 1:3. For example, there are three anti-overflow magnets 4, namely magnet A, magnet B, and magnet C, where the north pole of magnet A faces the north pole of magnet B, and the south pole of magnet B faces the south pole of magnet C. The north poles of magnet A and magnet B are located behind the north pole of magnetic member 2, while the south poles of magnet B and magnet C are located behind the south pole of magnetic member 2. By the principle that like magnetic fields repel each other, the magnetic field lines of magnetic member 2 are reliably blocked to prevent the magnetic field lines of magnetic member 2 from escaping.

[0029] In this embodiment, two adjacent anti-overflow magnets 4 are spaced apart, with the same poles of the two adjacent anti-overflow magnets 4 facing the corresponding same poles of the magnetic member 2. In other words, in actual use, the volume of the anti-overflow magnets 4 is less than half the volume of the magnetic member 2, so the two anti-overflow magnets 4 need to be spaced apart. By combining multiple anti-overflow magnets 4, the magnetic field strength of the anti-overflow structure 3 is enhanced through the principle of magnetic field superposition.

[0030] In this embodiment, the first surface is provided with a first mounting groove 5, the second surface is provided with a second mounting groove 6, the magnetic member 2 is installed in the first mounting groove 5, and the anti-overflow structure 3 is installed in the second mounting groove 6. Preferably, after the magnetic member 2 is installed in the first mounting groove 5 and the anti-overflow structure 3 is installed in the second mounting groove 6, they are respectively fixed by conventional means such as welding or gluing. Example

[0031] This embodiment provides a disc motor, including a stator module 7 and two rotors 8. The stator module 7 is arranged between the two rotors 8. Both rotors 8 can rotate relative to the stator module 7. The rotor 8 is the magnetic flow anti-overflow rotor 8 described in Example 1.

[0032] The disc motor's driving principle can be found in Chinese invention patent number CN201610075290.5. Specifically, two rotors 8 are located on either side of a stator module 7. The opposite sides of the two rotors 8 have overflow prevention structures 3, ensuring that the stator module 7 can stably drive the two rotors 8 while also allowing the disc motor to operate under overload conditions.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

[0034] Type your sequence listing free description paragraph here.

Claims

1. A magnetic flow overflow prevention rotor, comprising a main body and a plurality of magnetic parts arranged on the main body, Features: With the center of the main body as the center of the circle, multiple magnetic parts are distributed in the main body in a circular array, and the magnetic directions of the two ends of the magnetic parts are parallel to the movement direction of the main body; the main body has a first surface and a second surface, and the multiple magnetic parts are arranged on the first surface, and the second surface is provided with an overflow prevention structure, the first surface is used to face the electromagnetic structure of the stator, and the overflow prevention structure is used to prevent the magnetic field lines of the magnetic parts from escaping when the magnetic field of the electromagnetic structure increases; The anti-overflow structure is made by transverse magnetization.

2. The magnetic flow anti-overflow rotor according to claim 1, Features: The anti-overflow structure includes at least two anti-overflow magnets, at least two of which are distributed on the second surface along the rotation direction of the rotor, and adjacent anti-overflow magnets have the same poles facing each other; the anti-overflow magnets and the magnetic parts are arranged with the same poles corresponding to each other.

3. The magnetic flow anti-overflow rotor according to claim 2, Features: Two adjacent anti-overflow magnets are arranged at intervals, and the same poles of the two adjacent anti-overflow magnets are both oriented toward the same poles corresponding to the magnetic member.

4. The magnetic flow anti-overflow rotor according to claim 2, Features: The ratio of the number of the magnetic parts to the anti-overflow magnets is 1:

3.

5. The magnetic flow anti-overflow rotor according to claim 1, Features: The first surface is provided with a first mounting groove, the second surface is provided with a second mounting groove, the magnetic component is installed in the first mounting groove, and the anti-overflow structure is installed in the second mounting groove.

6. A disc motor, comprising a stator module and two rotors, wherein the stator module is arranged between the two rotors, and the two rotors can rotate relative to the stator module. Features: The rotor is the magnetic flow anti-overflow rotor as described in any one of claims 1-5.

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