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Rotor core of segmented skewed-pole motor and permanent magnet synchronous motor

A rotor core and oblique pole technology, applied in the direction of magnetic circuits, electric components, electrical components, etc., can solve the problem that the comprehensive vibration and noise reduction effect is not optimal, so as to achieve a good comprehensive vibration and noise reduction effect and suppress vibration Effects of noise, reduction of torque ripple and radial electromagnetic force

Pending Publication Date: 2020-10-13
JING JIN ELECTRIC TECHNOLOGIES (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology uses the same punching structure for each section, and the comprehensive vibration and noise reduction effect at this time is not optimal

Method used

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  • Rotor core of segmented skewed-pole motor and permanent magnet synchronous motor
  • Rotor core of segmented skewed-pole motor and permanent magnet synchronous motor
  • Rotor core of segmented skewed-pole motor and permanent magnet synchronous motor

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] One embodiment of the present invention discloses a rotor core of a segmented oblique pole motor, such as figure 1 As shown, the rotor core includes a plurality of rotor core segments that are mutually staggered by a preset angle of 5, and the rotor core segments are formed by stacking rotor punches, and the rotor punches are stamped and formed; in the rotor core When the segments are assembled, the preset angle 5 is staggered between the rotor core segments, thereby reducing the cogging effect caused by the slots on the stator.

[0040] Each of the rotor core segments is provided with a magnetic steel slot 1 along the circumferential direction, and a magnetic steel slot can be arranged in the magnetic steel slot 1; the number of magnetic steel slots 1 is an even number, and two adjacent magnetic steel slots 1 are arranged symmetrically .

[0041] The outer circular surface of each rotor core segment is provided with several axially penetrating auxiliary grooves, and t...

Embodiment 2

[0064] An embodiment of the present invention discloses a permanent magnet synchronous motor. The permanent magnet synchronous motor includes a stator and a rotor, and the rotor is provided with the above-mentioned rotor core. The permanent magnet synchronous motor in this embodiment has low vibration noise and high NVH (Noise, Vibration, Harshness) quality.

[0065] To sum up, the present invention discloses a rotor core of a segmented oblique pole motor and a permanent magnet synchronous motor, including a plurality of rotor core segments staggered from each other by a preset angle, and the rotor core segments are laminated by rotor punching sheets; Each rotor core section is provided with a magnetic steel groove along the circumferential direction, and a magnetic steel can be arranged in the magnetic steel groove; there are several axially penetrating auxiliary grooves on the outer surface of each rotor core section, and each rotor iron The positions and / or cross-sectional ...

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Abstract

The invention discloses a rotor core of a segmented skewed-pole motor and a permanent magnet synchronous motor. The rotor core comprises a plurality of rotor core sections which are mutually staggeredat a preset angle, and the rotor core sections are formed by laminating rotor punching sheets; magnetic steel grooves are distributed in each rotor core section along the circumferential direction, and magnetic steel can be arranged in the magnetic steel grooves; a plurality of axially-penetrating auxiliary grooves are formed in the outer circumferential face of each rotor core section, the positions and / or the section shapes of the auxiliary grooves in each rotor core section are not completely the same, and the auxiliary grooves are used for restraining torque pulsation and vibration noisegenerated when the motor rotates. According to the scheme, the plurality of axially-penetrating auxiliary grooves are formed in the outer circumferential surface of each rotor core section; and the positions and / or the section shapes of the auxiliary grooves on the rotor core sections are not completely the same, so that the torque pulsation and the radial electromagnetic force generated by the rotor core of each section are respectively suppressed at a relatively low level, the overall torque pulsation and the radial electromagnetic force of the motor are reduced, and the vibration noise of the motor is effectively suppressed.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a rotor core of a segmented oblique pole motor and a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor generates electromagnetic torque through the interaction of the armature magnetic field and the rotor magnetic field. Among them, the armature magnetic field is generated by the stator current, and the rotor magnetic field is provided by the rotor permanent magnet. The combined magnetic field of these two magnetic fields in the air gap of the motor is the air gap magnetic field. Due to the influence of factors such as stator slotting and iron core magnetic saturation, the air gap magnetic field is not a standard sine wave, and there will be harmonic components in it, which will generate torque ripple and obvious radial electromagnetic force on certain orders, resulting in Noise and vibration of the motor. [0003] For some ...

Claims

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Application Information

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IPC IPC(8): H02K1/27H02K29/03
CPCH02K1/274H02K29/03H02K2213/03H02K1/276H02K2201/06
Inventor 张凯贺张亮亮琚龙玉
Owner JING JIN ELECTRIC TECHNOLOGIES (BEIJING) CO LTD
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