Rotor iron core and permanent magnet synchronous motor with same

A technology for permanent magnet synchronous motors and rotor cores, applied in synchronous machines, magnetic circuits, electric components, etc., can solve the problems of not considering vibration and noise, improper distribution of winding motors, etc., and achieve harmonic reduction and electromagnetic force reduction And the effect of operating vibration noise and fundamental magnetic field increase

Active Publication Date: 2016-05-04
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for this motor, the vibration and noise problem caused by the third-order electromagnetic force generated by the 9-slot 6-pole fractional-slot motor is not considered, and this method is not suitable for distributed coil motors

Method used

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  • Rotor iron core and permanent magnet synchronous motor with same
  • Rotor iron core and permanent magnet synchronous motor with same
  • Rotor iron core and permanent magnet synchronous motor with same

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Embodiment Construction

[0030] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] The main purpose of the present invention is to provide a rotor core capable of reducing vibration and noise and improving working performance and a permanent magnet synchronous motor with the same.

[0032] Such as figure 1 As shown, the present invention provides a rotor core.

[0033] Specifically, such as Figure 1 to Figure 3 As shown, the rotor core includes a core body 10 , and a groove 20 is opened on the outer peripheral wall of the core body 10 along the axial direction of the core body 10 . The groove 20 includes at least one first groove 21 and at least one second groove 22 which communicate with each other. The depth S2 of the first groove 21 along the radial direction of...

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Abstract

The invention provides a rotor iron core and a permanent magnet synchronous motor with the same. The rotor iron core comprises an iron core body, wherein grooves are formed on the peripheral wall of the iron core body in an axial direction of the iron core body; the grooves comprise a first groove and a second groove which are communicated mutually; and a depth of the first groove in a radial direction of the iron core body is greater than that of the second groove in the radial direction of the iron core body. At the position of the first groove, an air gap is the largest, magnetic resistance is high, an air gap flux density is small, and an applied moment fluctuation with a stator tooth socket is reduced; the first groove and the second groove have different depths; by transition of the second groove, a fundamental wave magnetic field is increased and is closer to sine; a torque of the tooth socket is reduced, so that a motor output is increased, a harmonic wave is reduced, and an electromagnetic force and operation vibration voice of the motor are reduced.

Description

technical field [0001] The invention relates to a rotor iron core and a permanent magnet synchronous motor with the same. Background technique [0002] In a motor in the prior art, the outer circumference of the rotor is provided with V-shaped grooves and trimming grooves, and the trimming grooves are asymmetrical. Its rotor is composed of multiple axially misaligned iron cores, so that the cogging torque and the torque generated by the winding are 180° out of phase to reduce torque ripple. However, the process of the motor is complex, which is not convenient for mass production, and this may lead to a decrease in the performance of the motor and an increase in the cost of the motor. [0003] Another type of motor in the prior art has a permanent magnet motor stator and rotor structure with built-in V-shaped grooves, which can reduce loss, reduce torque ripple, reduce noise, and improve motor efficiency. But for this motor, the problem of vibration and noise caused by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/26H02K1/27H02K21/00
CPCH02K1/265H02K1/27H02K21/00
Inventor 史进飞陈彬肖勇吴曼
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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