CN201797389U

CN201797389U - Permanent magnet synchronous motor rotor

Info

Publication number: CN201797389U
Application number: CN2010205303008U
Authority: CN
Inventors: 王焕萍; 周红芳
Original assignee: Zhejiang Xizi Forward Electrical Machinery Co Ltd
Current assignee: Zhejiang Xizi Forward Electrical Machinery Co Ltd
Priority date: 2010-09-13
Filing date: 2010-09-13
Publication date: 2011-04-13
Anticipated expiration: 2020-09-13

Abstract

The utility model relates to a permanent magnet synchronous motor rotor, in particular to a motor rotor comprising a rotor core with a sectional structure. The permanent magnet synchronous motor rotor comprises a main shaft (1) of the motor rotor, the rotor core (3) and magnetic steels (4), wherein the rotor core (3) is formed by combining at least three sections of disc-like rotor cores (3-1 to 3-3); at least two magnetic steels (4) are embedded into the rotor core along an inner circumference surface or are distributed on magnetic steel slots (6) in each section of rotor core; every two adjacent sections of rotor cores are ensured to be distributed in a staggering way relative to the section positions of the magnetic steels (4) to form skew rotor pole permanent magnets; and outer circle of the rotor adopts an eccentric structure. The product completely solves problems in the prior art; due to the adoption of the sectional structure, the rotor core is simple in machining and has high material utilization ratio; the eccentric structure of the outer arc of the rotor endows a motor with the advantages of low magnetic harmonics, low vibration noises and high control accuracy; and the rotor is applied to any permanent magnet synchronous motor.

Description

Permanent-magnetic synchronous motor rotor

Technical field

The utility model relates to a kind of permanent-magnetic synchronous motor rotor, and especially rotor core adopts the rotor of segmentation structure.

Background technology

In recent years, motor mostly adopts permagnetic synchronous motor, and the rotor core of permagnetic synchronous motor all is integral type or the structure that is called whole radical, and this structure exists that harmonic wave is big, vibration is big and shortcoming such as noise is big.In order to reach the minimizing harmonic wave, alleviate the purpose of vibration and noise, people adopt the frame mode of skewed stator slot or skewed-rotor usually, the skewed stator slot structure is that the stator punching angle that staggers laminates, but this structure can't be used the method for traditional flute profile location and axle location, must position by special frock; The mode of skewed stator slot reduces the utilance of stator slot simultaneously, and the coiling difficulty increases.The frame mode of traditional skewed-rotor adopts oblique magnet steel, though can reach the effect same with skewed stator slot, magnet steel is made oblique sheet, makes the processing cost of magnet steel increase, and stock utilization reduces.Because the input of motor is generally sine-wave current, when if the air-gap field waveform that rotor permanent magnet produces also is sinusoidal wave, the rotor torque fluctuation is zero in theory, the motor performance optimum, this moment motor and control system matching performance the best, the electromagnetism harmonic wave that produces is also minimum, and the vibrating noise of motor is also minimum.And prior motor to be external-rotor-type structure or inner-rotor-type structure Design all do not consider these factors, so be easy to generate the fluctuation on the speed, control precision is poor, causes oscillatory occurences and produces bigger noise.

Chinese patent finds no the rotor innovation and creation of adopting straight magnet steel to adopt segmentation structure as skewed-rotor permanent magnet and rotor core by retrieval.

The utility model content

The purpose of this utility model is intended to solve problems of the prior art, a kind of permanent-magnetic synchronous motor rotor is provided, described permanent-magnetic synchronous motor rotor forms the oblique utmost point of rotor core segmentation by the segmented design, has reduced cogging torque effectively, has reduced vibration and noise; The rotor external arc is made eccentric structure, reduced the electromagnetism harmonic wave of permagnetic synchronous motor, improved control precision; Replace oblique magnet steel by straight magnet steel and reduced processing cost, improved the magnetic steel material utilance.

The technical solution of the utility model label in conjunction with the accompanying drawings is described below.A kind of permanent-magnetic synchronous motor rotor, the main shaft 1 that comprises rotor, rotor core 3 and magnet steel 4, described rotor core 3 is at least three sections discoid rotor core 3-1,3-2, the 3-3 recombinant is an one, described rotor core 3-1,3-2,3-3 along inner peripheral surface be embedded in or magnet steel groove 6 in every section rotor core on arrange at least two magnet steel 4, and guarantee the two neighboring sections rotor core for the sectional position of magnet steel 4 for being staggeredly arranged with formation skewed pole rotor structure, wherein, described rotor core 3-1,3-2 and 3-3 are eccentric structure, that is: the distance that departs from of the center of circle 8 of the rotor external arc of rotor external arc 7 and the interior center of circle 9 of rotor is the exradius that 0.1mm arrives designed rotor, so that size of gaps is inconsistent.

The utility model has been realized the object of the invention, has thoroughly solved the problem that prior art exists, and rotor core adopts straight magnet steel to reach the effect of the oblique utmost point owing to adopt segmentation structure, has processing simply, the stock utilization height; Unique eccentric structure, it is little to make motor have the electromagnetism harmonic wave, and vibrating noise is little, the advantage that control precision is high; This rotor is suitable for any permagnetic synchronous motor.

Description of drawings

Fig. 1 is a tangential plane schematic diagram of the present utility model.

Fig. 2 is an axial schematic diagram of the present utility model.

Fig. 3 is that schematic diagram is placed in magnet steel 4 positions among Fig. 1.

Fig. 4 is the structural representation of part 2-1 and 2-2 among Fig. 1.

Indicate among the figure, 1, main shaft, 2-1 is the right side end ring, 2-2 is the left side end ring, 3, rotor core, 3-1,3-2,3-3 are rotor core, 4, magnet steel, 5, securing member, 6, magnet steel groove, 7, the rotor external arc, 8, the center of circle of rotor external arc, 9, the round heart in the rotor.

Embodiment

Further describe detailed technology content of the present utility model and embodiment below in conjunction with accompanying drawing 1-4.

Accompanying drawing 1 is the utility model one preferred forms tangential plane structural representation, 1 structure that can clearly represent the permanent-magnetic synchronous motor rotor that the utility model provides with reference to the accompanying drawings, this rotor comprises the main shaft 1 of rotor, rotor core 3 and magnet steel 4, described rotor core 3 is at least three sections discoid rotor core 3-1,3-2, the 3-3 recombinant is a full circle column structure, described rotor core 3-1,3-2,3-3 along inner peripheral surface be embedded in or magnet steel groove 6 in every section rotor core on arrange at least two magnet steel 4, and guarantee the two neighboring sections rotor core for the sectional position of magnet steel 4 for being staggeredly arranged with formation skewed-rotor permanent magnet.Described three-stage rotor iron core 3-1,3-2,3-3 are disc-shaped structure, but their width is unrestricted, as long as become a full circle cylinder after satisfying combination, and rotate to an angle between the two neighboring sections rotor core so that the magnet steel after installing 4 forms oblique electrode structure.Theoretically, number of fragments is many more, tiltedly utmost point effect is obvious more, the effect of resonance control is good more, but considers the cost of technology on engineering, and the selection of number of fragments is often less, particularly in the short motor of rotor core length, so when producing in batches, consider the convenience of processing, be divided into the 3-5 section usually.Described rotor core 3 cylindricals are non-just round structure, and promptly the center of circle 8 of the rotor external arc of rotor external arc 7 does not overlap with the interior round heart 9 of rotor, and the quantity of rotor external arc 7 is consistent with the quantity of magnet steel 4, the center line of circular arc 7 and the central lines of magnet steel.Described rotor core 3 two ends are compressed by securing member 5 by end ring 2-1 and end ring 2-2 respectively, and described securing member 5 is a rivet, or screw, and described end ring 2-1 and end ring 2-2 go up the securing member 5 of at least three of distributions.

Accompanying drawing 2 is axial schematic diagram; 1,2 can know the structure of representing the utility model one preferred forms in conjunction with the accompanying drawings.

Accompanying drawing 3 is that schematic diagram is placed in magnet steel 4 positions; Can clearly be seen that the arrangement of magnet steel 4 by accompanying drawing 3, magnet steel 4 is built-in radial or cutting orientation structure, and magnetizing direction is parallel magnetization or radial magnetizing.The utility model one major technique feature is: guarantee the two neighboring sections rotor core for the sectional position of magnet steel 4 for being staggeredly arranged with formation skewed-rotor permanent magnet, rotor core 3-1, the 3-2, the 3-3 that have so just guaranteed at least three sections are after installation, can stagger in sectional position at magnet steel 4 in each section, thereby realize the skewed-rotor magnet structure, has the good technical effect, as effective reduction electromagnetism harmonic wave, reduce vibrating noise.

Fig. 4 is the structural representation of part 2-1 and 2-2 among Fig. 1, can clearly be seen that the structure of end ring by Fig. 4.In addition, on the lateral surface of described end ring 2-1 and end ring 2-2, can also regulate the dynamic balancing of rotor by adding several duckpins; Same reason, securing member 5 also can play the dynamic balancing effect of regulating rotor.

The utility model only is described in detail with regard to most preferred embodiment; but can not be interpreted as restriction to other execution modes of the utility model; everyly further improve and similar or identical scheme on the utility model basis, all being considered as is the scope that the utility model is asked for protection.

Claims

1. permanent-magnetic synchronous motor rotor, the main shaft (1) that comprises rotor, rotor core (3) and magnet steel (4), it is characterized in that: described rotor core (3) is for being divided into three sections discoid rotor core (3-1 at least, 3-2 and 3-3) recombinant is one, described rotor core (3-1,3-2 and 3-3) be embedded in or magnet steel groove (6) in every section rotor core is gone up and arranged at least two magnet steel (4) along inner peripheral surface, and guarantee the two neighboring sections rotor core for the sectional position of magnet steel (4) for being staggeredly arranged with formation skewed-rotor permanent magnet, wherein, described rotor core (3-1,3-2 and 3-3) be eccentric structure, that is: the distance that departs from of the interior center of circle (9) of the center of circle (8) of rotor external arc (7) and rotor is the exradius that 0.1mm arrives designed rotor.

2. according to the described permanent-magnetic synchronous motor rotor of claim 1, it is characterized in that: described rotor core (3) two ends are compressed by securing member (5) by end ring (2-1 and 2-2) respectively, described securing member (5) is a rivet, or screw, described end ring (2-1 and 2-2) is gone up the securing member (5) of at least three of distributions.

3. permanent-magnetic synchronous motor rotor according to claim 1 is characterized in that: described magnet steel (4) is built-in radial or cutting orientation structure, and magnetizing direction is parallel magnetization or radial magnetizing.