Staggered permanent magnet motor with heat dissipation device

Abstract

The utility model is applicable to the field of motors, and particularly relates to a staggered permanent magnet motor with a heat dissipation device, and a stator yoke part comprises a motor roller and a motor protection magnetic ring; the rotor tooth part and the rotor yoke part are integrally formed, and a motor output shaft is also fixed at one end of the rotor yoke part; a cooling sleeve is fixed between the rotor tooth part and the permanent magnet, a ceramic radiating fin is wrapped outside the cooling sleeve, cooling liquid is filled in the cooling sleeve, and the front end and the rear end of the cooling sleeve are connected with a cooling channel conversion device through pipelines. According to the motor cooling device, the stator and the permanent magnet are staggered, so that torque pulsation is restrained, the motor efficiency is enhanced, the fault-tolerant capability of the motor in a fault state is improved, meanwhile, the cooling sleeve is arranged between the permanent magnet and the rotor, and the cooling liquid is filled in the sleeve. According to the utility model, the heat dissipation of the motor is uniform, the motor can operate for a long time, the service life of the motor is prolonged, and the energy consumption of the motor is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of motors, and particularly relates to a misaligned permanent magnet motor with a heat dissipation device. Background Art

[0002] The misaligned permanent magnet motor is a new type of motor, and its design aims to improve the efficiency and performance of the motor. Compared with the traditional permanent magnet motor, the misaligned permanent magnet motor usually adopts a special structure and layout to achieve better magnetic field distribution and reduce losses, and is widely used in electric vehicles, industrial drive systems, robots and other fields.

[0003] In the misaligned permanent magnet motor, the arrangement of the permanent magnets is usually misaligned. This design can reduce the vibration and noise of the motor while effectively improving the output power and torque of the motor, and can improve the heat dissipation performance of the motor and extend its service life. However, the existing misaligned permanent magnet motors do not have a special heat dissipation device. When the existing misaligned permanent magnet motors are actually used, local heating will occur, which will cause the efficiency of the misaligned permanent magnet motor to decrease, the energy consumption to increase, and at the same time increase the risks of short circuit and fire.

[0004] To solve the above problems, the existing device cools the coolant by setting heat sinks on the support shell. Although the existing device achieves a certain cooling effect, it does not fundamentally solve the problem of internal heating of the motor, and will cause the motor efficiency to decrease and the energy consumption to increase after long-term use.

[0005] In summary, there is an urgent need for a heat dissipation device to solve the problems that the existing misaligned permanent magnet motors have reduced efficiency and increased energy consumption due to the lack of a special heat dissipation device. Summary of the Utility Model

[0006] The embodiment of the utility model provides a misaligned permanent magnet motor with a heat dissipation device, aiming to solve the problems that the existing misaligned permanent magnet motors have reduced efficiency and increased energy consumption due to the lack of a special heat dissipation device.

[0007] The embodiment of the utility model is implemented as follows:

[0008] A misaligned permanent magnet motor with a heat dissipation device includes:

[0009] A stator yoke, the stator yoke includes a motor drum and a motor protective magnetic ring. The motor protective magnetic ring is fixed on the inner wall of the motor drum. Permanent magnets are also fixed on the inner wall of the motor drum, and the positive and negative poles of adjacent permanent magnets are arranged alternately;

[0010] A rotor, the rotor includes a rotor yoke and rotor teeth. The rotor teeth are integrally formed with the rotor yoke, and a motor output shaft is also fixed at one end of the rotor yoke;

[0011] A cooling sleeve is fixed between the rotor teeth and the permanent magnet. A ceramic heat sink is wrapped around the outside of the cooling sleeve. The cooling sleeve is filled with a coolant. The front end and the rear end of the cooling sleeve are connected to a cooling channel conversion device through pipes.

[0012] Furthermore, the cooling channel conversion device is fixedly connected to the motor output shaft through a sealed bearing, and the cooling channel conversion device is connected to a cooling device through a pipe.

[0013] Furthermore, a coolant inlet is provided on the outside of the cooling channel conversion device on the side close to the output shaft, a coolant outlet is provided on the cooling channel conversion device on the side far from the output shaft, and a plurality of coolant diversion holes are provided on the side of the cooling channel close to the motor teeth.

[0014] Furthermore, the coolant inlet communicates with the coolant diversion holes.

[0015] The beneficial effects achieved by the present utility model are as follows:

[0016] By staggering the stator and the permanent magnet, the present utility model achieves suppressing torque ripple, enhancing motor efficiency, increasing the fault tolerance of the motor in a fault state. At the same time, a cooling sleeve is provided between the permanent magnet and the rotor, and the sleeve is filled with a coolant. Compared with the existing motor cooling device, the present utility model can make the motor dissipate heat evenly, the motor can operate for a long time, extend the service life of the motor, and also reduce the energy consumption of the motor. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a displaced permanent magnet motor with a heat dissipation device provided by the present utility model;

[0018] Figure 2 is a schematic structural diagram of the cooling sleeve of the present utility model.

[0019] Reference Numerals in the Drawings:

[0020] 100, displaced permanent magnet motor;

[0021] 110, cooling channel conversion device; 111, sealed bearing; 120, rotor yoke; 121, rotor teeth; 130, motor drum; 131, permanent magnet; 140, cooling sleeve; 141, ceramic heat sink; 142, motor output shaft. Detailed Embodiments

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The utility model adopts the method of staggering the stator and the permanent magnet to suppress torque ripple, enhance the motor efficiency, increase the fault tolerance of the motor in the fault state, and at the same time, a cooling sleeve is arranged between the permanent magnet and the rotor, and the sleeve is filled with a coolant, which can make the motor dissipate heat evenly, ensure the stable operation of the motor, reduce the energy consumption of the motor, enable the motor to operate for a long time, and extend the service life of the motor.

[0024] Example 1

[0025] Referring to Figure 1 , in the embodiment of the present utility model, a misaligned permanent magnet motor 100 with a heat dissipation device includes:

[0026] A stator yoke, which includes a motor drum 130 and a motor magnetic protection ring. The motor magnetic protection ring is fixed on the inner wall of the motor drum 130. A permanent magnet 131 is also fixed on the inner wall of the motor drum 130, and the positive and negative poles of adjacent permanent magnets 131 are arranged alternately;

[0027] A rotor, which includes a rotor yoke 120 and rotor teeth 121. The rotor teeth 121 and the rotor yoke 120 are integrally formed, and a motor output shaft 142 is also fixed at one end of the rotor yoke 120;

[0028] A cooling sleeve 140 is fixed between the rotor teeth 121 and the permanent magnet 131. A ceramic heat dissipation fin 141 is wrapped outside the cooling sleeve 140. The cooling sleeve 140 is filled with a coolant, and the front end and the rear end of the cooling sleeve 140 are connected to a cooling channel conversion device 110 through pipes.

[0029] In this embodiment, the stator yoke is used to protect the motor, which is usually composed of a motor drum 130. In order to save space, motor magnetic protection rings are fixed at both ends of the inner wall of the motor drum 130. On the one hand, the motor magnetic protection rings play a role in fixed connection, making the motor more reliable. On the other hand, they play a role in protecting the magnetic field of the motor and reducing the magnetic leakage of the motor. It should be noted that the motor magnetic protection rings can be fixed in the motor drum 130 by means of inlaying.

[0030] A permanent magnet 131 is also fixed to the inner wall of the motor drum 130. The permanent magnet 131 is used to generate a fixed magnetic field. The energized rotor rotates under the action of the magnetic field to achieve the conversion of electrical energy into kinetic energy. The shape of the permanent magnet 131 is complementary to the inner wall of the motor drum 130. The permanent magnet 131 is attached to the inner wall of the drum. There are multiple permanent magnets 131, and the specific number can be adjusted according to the actual power and speed required. The positive and negative poles of adjacent permanent magnets 131 are arranged alternately. The center line of at least one permanent magnet 131 forms a certain angle with the center line of the stator teeth, and the number of overlaps between the center line of the permanent magnet 131 and the center line of the stator teeth cannot be equal to zero. It should be explained that the center line of the permanent magnet 131 always overlaps with the center line of part of the rotor teeth 121. The angle adjustment of the rotor dislocation is achieved by misaligning the permanent magnet 131 and the rotor teeth 121, thereby eliminating the rotor axial force of the traditional motor during operation, thereby increasing efficiency and reducing energy consumption.

[0031] The rotor is used to convert electrical energy into kinetic energy. The rotor includes a rotor yoke 120 and a rotor tooth 121. The rotor yoke 120 is used to fix and support the rotor. The rotor tooth 121 is used to wind the coil, so that the rotor generates a certain torque under the action of the magnetic field, thereby realizing rotation of various powers and speeds. The rotor tooth 121 and the rotor yoke 120 are integrally formed. The output shaft of the motor is fixed at one end of the rotor yoke 120. The motor output shaft 142 is connected to various devices through various connectors.

[0032] A cooling sleeve 140 is also provided between the rotor teeth 121 and the permanent magnets 131. The cooling sleeve 140 can be embedded in the inner cavity of the motor drum 130 in an embedded manner. The cooling sleeve 140 is used to isolate the rotor from the motor drum 130 so that the rotor is in a sealed cavity. A ceramic heat sink 141 is wrapped outside the cooling sleeve 140. The ceramic heat sink 141 is used to absorb the temperature inside the cooling sleeve 140 and reduce its temperature through an external fan, thereby reducing the temperature of the rotor inside the motor. The cooling sleeve 140 is filled with coolant. The coolant absorbs the heat of the wires wound around the rotor teeth 121 to reduce the temperature of the rotor teeth 121. The cooling channel conversion device 110 is connected to the front and rear ends of the cooling sleeve 140 through pipelines. The external coolant can enter the cooling sleeve 140 evenly through the cooling channel conversion device 110, so that the temperature of the wires wound around the rotor teeth 121 is reduced faster, and the cooling effect is obvious.

[0033] Based on the above structure, the coolant enters the cooling sleeve 140 through the cooling channel conversion device 110. The coolant flows through the rotor yoke 120 and the rotor teeth 121, and at the same time exchanges heat with the rotor, absorbing the heat on the rotor and reducing the temperature on the rotor. The temperature in the coolant is dissipated in one way through the coolant circulation, and in the other way is transferred to the ceramic heat sink 141 through the cooling sleeve 140 and blown out of the motor interior by the fan. By combining the coolant and the fan, the heat inside the motor can be reduced, fundamentally solving the problem of the heat inside the motor.

[0034] The embodiment adopts the method of misaligning the stator and the permanent magnet 131 to suppress torque ripple, enhance the motor efficiency, and increase the fault tolerance of the motor in the fault state. At the same time, a cooling sleeve 140 is provided between the permanent magnet 131 and the rotor, and the sleeve is filled with coolant, which can make the motor dissipate heat evenly, ensure the stable operation of the motor, reduce the energy consumption of the motor, enable the motor to run for a long time, and extend the service life of the motor.

[0035] Example 2

[0036] Specifically, referring to Figure 2 , the cooling channel conversion device 110 is fixedly connected to the motor output shaft 142 through the sealed bearing 111, and the cooling channel conversion device 110 is connected to the cooling device through a pipeline.

[0037] Referring to Figure 2 , in this embodiment, the cooling channel conversion device 110 is fixedly connected to the motor output shaft 142 through the sealed bearing 111, and the cooling channel conversion device 110 is connected to the cooling device through a pipeline. Among them, the cooling device can be a cooling circulation pump, a cooling tank, or other devices with the function of storing and circulating coolant. The cooling channel conversion device 110 and the sealed bearing 111 can be fixedly connected by an inlay method. The inner side of the sealed bearing is inlaid on the output shaft, and the outer side of the sealed bearing 111 is inlaid and connected to the cooling channel conversion device 110.

[0038] By providing the cooling channel conversion device 110, a small amount of coolant outside the motor can be converted into multiple cooling channels inside the motor through the cooling channels. On the one hand, the coolant can enter the motor interior evenly, and on the other hand, it can prevent multiple cooling channels from directly passing through the stator yoke and the output shaft, ensuring the strength of the stator yoke and the output shaft itself and the firmness of the connection between the output shaft and the rotor yoke 120.

[0039] Example 3

[0040] On the outer side of the cooling channel conversion device near the output shaft side, there is a coolant inlet, and on the side of the cooling channel conversion device 110 far from the output shaft side, there is a coolant outlet. On one side of the cooling channel close to the motor tooth part, there are a plurality of coolant diversion holes.

[0041] In this embodiment, on the outer side of the cooling channel conversion device near the output shaft side, there is a coolant inlet, and on the side of the cooling channel conversion device 110 far from the output shaft side, there is a coolant outlet. The coolant inlet is for the entry of coolant, and the coolant outlet is for the discharge of coolant. On one side of the cooling channel close to the motor tooth part, there are a plurality of coolant diversion holes. The coolant enters from the coolant inlet, enters the cooling sleeve 140 through the plurality of coolant diversion holes, and is discharged through the cooling channel conversion device 110 on the side far from the output shaft through the plurality of diversion holes. The coolant circulates through an external cooling device and then enters the cooling sleeve 140 from the cooling channel conversion device 110 on the side close to the output shaft to complete one cycle of coolant circulation.

[0042] By providing a plurality of cooling diversion holes in the cooling channel conversion device 110, the coolant can enter the cooling sleeve 140 evenly, enabling the motor rotor to dissipate heat evenly, increasing the efficiency of heat exchange, and making the heat dissipation effect obvious.

[0043] Example 4

[0044] The coolant inlet is communicated with the coolant diversion holes.

[0045] In this embodiment, the coolant inlet is communicated with the coolant diversion holes, which can achieve the uniform dispersion of coolant from one coolant inlet to the rotor tooth part 121. It is easy to understand that the coolant diversion holes are communicated with the coolant outlet, which can enable the coolant to be quickly discharged from the coolant outlet, improve the heat exchange efficiency of the rotor tooth part 121, and quickly reduce the temperature inside the rotor.

[0046] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] In addition, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A misaligned permanent magnet motor with a heat dissipation device, characterized in that, Comprising: A stator yoke, the stator yoke includes a motor drum and a motor protection magnetic ring, the motor protection magnetic ring is fixed on the inner wall of the motor drum, and permanent magnets are also fixed on the inner wall of the motor drum, with the positive and negative poles of adjacent permanent magnets arranged alternately; A rotor, the rotor includes a rotor yoke and rotor teeth, the rotor teeth are integrally formed with the rotor yoke, and a motor output shaft is also fixed at one end of the rotor yoke; A cooling sleeve is fixed between the rotor teeth and the permanent magnets, a ceramic heat sink is wrapped outside the cooling sleeve, the cooling sleeve is filled with a coolant, and the front end and the rear end of the cooling sleeve are connected to a cooling channel conversion device through pipes.

2. The misaligned permanent magnet motor with a heat dissipation device according to claim 1, characterized in that The cooling channel conversion device is fixedly connected to the motor output shaft through a sealed bearing, and the cooling channel conversion device is connected to a cooling device through a pipe.

3. The misaligned permanent magnet motor with a heat dissipation device according to claim 2, characterized in that, A coolant inlet is provided on the outside of the cooling channel conversion device on the side close to the output shaft, a coolant outlet is provided on the cooling channel conversion device on the side far from the output shaft, and a plurality of coolant diversion holes are provided on the side of the cooling channel close to the motor teeth.

4. The misaligned permanent magnet motor with a heat dissipation device according to claim 3, wherein, The coolant inlet is communicated with the coolant diversion holes.

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