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Rotors, motors, compressors and refrigeration equipment
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A rotor and rotor core technology, applied in the field of compressors, can solve the problems of cutting, large iron loss and vibration and noise
Active Publication Date: 2022-02-11
ANHUI MEIZHI PRECISION MFG
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Abstract
Description
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Problems solved by technology
In order to provide motors with higher cost performance, the industry tends to design motors with higher power density in recent years, so the core loss of the motor has attracted much attention. Among them, the no-load iron loss is mainly generated by the permanent magnet magnetic field. By optimizing the air gap magnetic field harmonic Wave, more targeted design can be carried out, but after the motor is energized, the armature iron loss generated comes from the time and space harmonics of the synthetic magnetic field generated by the interaction of the stator magnetic field and the rotor magnetic field, which will produce greater iron loss and Vibration noise, this part of the loss is difficult to reduce through targeted design, so the suppression of iron loss generated by this part of the current becomes the key to the success of the design
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Embodiment 1
[0075] Such as figure 1 As shown, according to an embodiment of the first aspect of the present invention, the present invention proposes a rotor 1 comprising a rotor core 10 , a mounting slot 12 and a plurality of slits.
[0076] Specifically, the rotor 1 includes a rotor core 10, the rotor core 10 is provided with a plurality of installation slots 12, and the plurality of installation slots 12 are distributed along the circumferential direction of the rotor iron core 10; permanent magnets are arranged in the installation slots 12 to form magnetic poles, Wherein, the permanent magnet includes a first permanent magnet and a second permanent magnet, and the extension line of the side wall of the first permanent magnet away from the rotation axis of the rotor 1 and the side wall of the second permanent magnet away from the rotation axis of the rotor 1 do not coincide and intersect at One point; a plurality of slits are provided on the rotor core 10, located on the side of the mo...
Embodiment 2
[0087] Such as Figure 5 and Figure 6 As shown, according to an embodiment of the present invention, in addition to the features defined in the above embodiments, preferably: any mounting groove 12 is away from the side of the rotation axis of the rotor 1 and is on the same side of the d-axis, the first The included angle between the direction line of the slit 14 and the direction line of the second slit 16 is greater than or equal to 3° and less than or equal to 20°.
[0088] In this embodiment, the extension lines of the direction lines of the first slit 14 and the second slit 16 form an acute angle δ, specifically, 3°≤δ≤20°, thereby changing the overall shape of the magnetic flux and effectively improving the output of the motor Power, when the motor is applied to the compressor, it realizes the low noise and high efficiency of the compressor.
Embodiment 3
[0090] Such as Figure 8 As shown, according to an embodiment of the present invention, in addition to the features defined in the above embodiments, preferably: along the direction perpendicular to the direction line of the first slit 14, the width of the first slit 14 is L1; In the direction of the direction line of the second slit 16, the width of the second slit 16 is L2, and L1 is not equal to L2; and / or along the direction of the direction line of the slit, the width of any slit is not equal.
[0091] In this embodiment, considering that the penetration depth of the armature magnetic field on the surface of the rotor 1 is different, the widths of the first slit 14 and the second slit 16 along the circumferential direction are not equal to realize the change of the slit width. It is beneficial to weaken the armature magnetic field.
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Abstract
The invention provides a rotor, a motor, a compressor and refrigeration equipment. The rotor includes a rotor iron core, and the rotor iron core is provided with a plurality of installation grooves, and the plurality of installation grooves are distributed along the circumferential direction of the rotor iron core; permanent magnets are arranged on Mounting slots to form magnetic poles; multiple slits are arranged on the rotor core, located on the side of the mounting slot away from the rotation axis of the rotor, and in a section perpendicular to the rotation axis of the rotor, the slits are close to the installation slot and far away from the installation The line connecting the midpoints of the two ends of the groove forms the direction line of the slit, wherein the slit includes a first slit and a second slit located on the same side of the d-axis, and the direction line of the first slit and the second slit The extension lines of the direction lines of the slots intersect at one point and the intersection point is not on the d-axis, where the center line of any magnetic pole passing through the axis of the rotor core is set as the d-axis. The rotor of the present invention can weaken the rotor air-gap magnetic density harmonics, reduce the torque fluctuation of the motor, increase the counter electromotive force of the rotor, and further improve the energy efficiency of the compressor.
Description
technical field [0001] The invention relates to the technical field of compressors, in particular to a rotor, a motor, a compressor and a refrigeration device. Background technique [0002] At present, in the rotary DC frequency conversion compressor, the motor generally adopts the built-in permanent magnet motor. For this kind of motor, the role of the stator armature reaction is stronger, so the rotor structure of this motor has a larger armature iron loss. . In order to provide motors with higher cost performance, the industry tends to design motors with higher power density in recent years, so the core loss of the motor has attracted much attention. Among them, the no-load iron loss is mainly generated by the permanent magnet magnetic field. By optimizing the air gap magnetic field harmonic Wave, more targeted design can be carried out, but after the motor is energized, the armature iron loss generated comes from the time and space harmonics of the synthetic magnetic fi...
Claims
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Application Information
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