Magnetic steel heat dissipation structure for rotor

Abstract

The utility model discloses a magnetic steel heat dissipation structure for a rotor, which comprises a rotating shaft, a rotor core, rotor pressing plates, magnetic steel and a heat conduction piece, the rotor core and the rotor pressing plates are fixedly arranged on the rotating shaft, the two ends of the rotor core are in pressing contact with the rotor pressing plates, a plurality of magnetic steel grooves penetrating through the rotor core are arranged on the rotor core, and the heat conduction piece is arranged in the magnetic steel grooves. According to the utility model, the heat conduction piece is additionally arranged in the rotor, and the temperature of the magnetic steel in the rotor iron core is reduced through the heat conduction piece.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a magnetic steel heat dissipation structure for a rotor. Background Art

[0002] During the operation of the motor, various losses will occur, which will not only reduce the motor's working efficiency, but also increase the internal temperature of the motor. When the motor temperature is too high, its internal materials will change, which will further affect the normal operation of the motor. The motor needs to use cooling medium to take away the heat generated during operation, so as to avoid a series of problems caused by excessive temperature.

[0003] The main sources of motor heat are iron loss, copper loss and magnetic steel eddy current loss. Iron loss is composed of rotor and stator core loss. Most of the losses of permanent magnet synchronous motors come from the iron loss of the stator core and the copper loss in the winding. They are cooled by heat exchange in the cooling medium in or outside the casing to reduce their temperature. The rotor can only exchange heat through air heat radiation, and the convection heat transfer efficiency of the cooling medium is much higher than that of the internal air convection heat transfer efficiency. Therefore, it is difficult to dissipate heat from the magnetic steel in the rotor, and the magnetic steel becomes the main factor limiting the motor power.

[0004] Due to the high power density and poor quality of the inverter power supply, high-power permanent magnet motors have large eddy current losses and high magnet temperatures in the rotor. The rotor core of a high-power permanent magnet motor is often longer, and the magnets at both ends are close to the rotor pressure plate, which can transfer heat to the pressure plate for heat dissipation, making the temperature at both ends lower than that in the middle section. The longer the core, the greater the temperature difference between the magnets in the middle of the rotor and the magnets close to the pressure plate on both sides, and the more uneven the temperature distribution, which in turn makes the temperature rise of the magnets subject to the temperature of the highest point of the magnets.

[0005] In order to solve the problem of high and uneven magnetic steel temperature, a magnetic steel heat dissipation structure solution is provided. Utility Model Content

[0006] The main purpose of the utility model is to provide a magnetic steel heat dissipation structure for a rotor.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A magnetic steel heat dissipation structure for a rotor comprises a rotating shaft, a rotor core, a rotor pressure plate, magnetic steel and a heat conductive member, wherein the rotor core is fixedly mounted on the rotating shaft, and both ends of the rotor core are pressed and contacted with the rotor pressure plate, and a plurality of magnetic steel slots penetrating the rotor core are provided on the rotor core, and magnetic steels are fixedly mounted in the magnetic steel slots, and a heat conductive member is also fixedly mounted in the magnetic steel slots, and the heat conductive member is tightly fitted and connected to the magnetic steel, and both ends of the heat conductive member are respectively tightly fitted and connected to the rotor pressure plates at both ends of the rotor core.

[0009] Furthermore, the length of the heat conductor and the magnetic steel is the same as the length of the rotor core.

[0010] Furthermore, each of the magnetic steel slots is provided with a heat conductive member and a magnetic steel, and the heat conductive member is provided on one side of the magnetic steel and is tightly fitted to the magnetic steel.

[0011] Furthermore, each of the magnetic steel slots is provided with a magnetic steel and two heat-conducting components, and the heat-conducting components are provided on both sides of the magnetic steel and are tightly fitted to the magnetic steel.

[0012] Furthermore, the heat conducting member is rectangular and is a heat conducting metal with a hollow structure.

[0013] Furthermore, the heat conducting member is rectangular and is a heat conducting metal with a solid structure.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Use heat-conducting parts to reduce the temperature of magnetic steel, increase power density, reduce volume and weight, and reduce costs.

[0016] 2. Reduce the temperature difference of magnetic steel at different positions and make the temperature distribution of magnetic steel more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 This is a top view of the rotor of Example 1 of the utility model;

[0019] Figure 3 This is a top view of the rotor of Example 2 of the utility model.

[0020] Reference numerals

[0021] 1. Rotating shaft; 2. Rotor core; 3. Rotor pressure plate; 4. Magnetic steel; 5. Heat conducting part; 6. Magnetic steel slot. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0023] Example 1

[0024] See also Figure 1-2As shown, a magnetic steel heat dissipation structure for a rotor includes a rotating shaft 1, a rotor core 2, a rotor pressure plate 3, a magnetic steel 4 and a heat conductive member 5. The rotor core 2 is fixedly mounted on the rotating shaft 1, and the two ends of the rotor core 2 are pressed and contacted with the rotor pressure plate 3. The rotor core 2 is provided with a plurality of magnetic steel slots 6 that penetrate the rotor core 2, and the magnetic steel 4 is fixedly mounted in the magnetic steel slots 6. The heat conductive member 5 is also fixedly mounted in the magnetic steel slots 6. The length of the heat conductive member 5 and the magnetic steel 4 is the same as the length of the rotor core 2. The heat conductive member 5 is tightly fitted and connected to the magnetic steel 4, and the two ends of the heat conductive member 5 are tightly fitted and connected to the rotor pressure plate 3 at the two ends of the rotor core 2 respectively.

[0025] A heat conducting member 5 and a magnetic steel 4 are disposed in each magnetic steel slot 6 . The heat conducting member 5 is disposed on one side of the magnetic steel 4 and is tightly fitted to the magnetic steel 4 .

[0026] The heat conducting member 5 is rectangular and is a heat conducting metal with a hollow structure.

[0027] The heat conducting member 5 is rectangular and is made of a heat conducting metal with a solid structure.

[0028] Embodiment 2:

[0029] See also Figure 1 and Figure 3 As shown, a magnetic steel heat dissipation structure for a rotor includes a rotating shaft 1, a rotor core 2, a rotor pressure plate 3, a magnetic steel 4 and a heat conductive member 5, wherein the rotor core 2 is fixedly mounted on the rotating shaft 1, and is characterized in that: the two ends of the rotor core 2 are pressed and contacted with the rotor pressure plate 3, the rotor core 2 is provided with a plurality of magnetic steel slots 6 penetrating the rotor core 2, the magnetic steel slots 6 are all fixedly mounted with the magnetic steel 4, the heat conductive member 5 is also fixedly mounted in the magnetic steel slots 6, the length of the heat conductive member 5 and the magnetic steel 4 is the same as the length of the rotor core 2, the heat conductive member 5 is tightly fitted and connected to the magnetic steel 4, and the two ends of the heat conductive member 5 are respectively tightly fitted and connected to the rotor pressure plate 3 at the two ends of the rotor core 2.

[0030] Each of the magnetic steel slots 6 is provided with a magnetic steel 4 and two heat conducting members 5 . The heat conducting members 5 are provided on both sides of the magnetic steel 4 and are tightly fitted to the magnetic steel 4 .

[0031] The heat conducting member 5 is rectangular and is a heat conducting copper tube with a hollow structure.

[0032] The heat conducting member 5 is rectangular and is a heat conducting copper block with a solid structure.

[0033] It should be noted that the heat conducting member 5 is made of a heat conducting metal material with good thermal conductivity, and is not limited to a heat conducting copper tube or a heat conducting copper block.

[0034] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A magnetic steel heat dissipation structure for a rotor, comprising a rotating shaft (1), a rotor core (2), a rotor pressure plate (3), a magnetic steel (4) and a heat conducting member (5), wherein the rotor core (2) is fixedly mounted on the rotating shaft (1), and characterized in that: The two ends of the rotor core (2) are tightly contacted with a rotor pressure plate (3), and the rotor core (2) is provided with a plurality of magnetic steel slots (6) penetrating the rotor core (2), and magnetic steels (4) are fixedly installed in the magnetic steel slots (6), and a heat conducting member (5) is also fixedly installed in the magnetic steel slots (6), and the heat conducting member (5) is tightly fitted and connected to the magnetic steel (4), and the two ends of the heat conducting member (5) are respectively tightly fitted and connected to the rotor pressure plates (3) at the two ends of the rotor core (2).

2. The rotor magnetic steel heat dissipation structure according to claim 1, characterized in that: The lengths of the heat conducting member (5) and the magnetic steel (4) are the same as the length of the rotor core (2).

3. The rotor magnetic steel heat dissipation structure according to claim 1, characterized in that: A heat conducting component (5) and a magnetic steel (4) are provided in each magnetic steel slot (6); the heat conducting component (5) is provided on one side of the magnetic steel (4) and is tightly fitted to the magnetic steel (4).

4. The rotor magnetic steel heat dissipation structure according to claim 1, characterized in that: Each of the magnetic steel slots (6) is provided with a magnetic steel (4) and two heat conducting components (5). The heat conducting components (5) are arranged on both sides of the magnetic steel (4) and are tightly fitted to the magnetic steel (4).

5. A rotor magnetic steel heat dissipation structure according to any one of claims 1 to 4, characterized in that: The heat conducting member (5) is rectangular and is a heat conducting metal with a hollow structure.

6. A rotor magnetic steel heat dissipation structure according to any one of claims 1 to 4, characterized in that: The heat conducting member (5) is rectangular and is a heat conducting metal with a solid structure.

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