CN201393104Y

CN201393104Y - Rare earth permanent magnetic synchronous motor rotor

Info

Publication number: CN201393104Y
Application number: CN200920130825U
Authority: CN
Inventors: 韩熠
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-14
Filing date: 2009-04-14
Publication date: 2010-01-27
Anticipated expiration: 2019-04-14

Abstract

A rare earth permanent magnetic synchronous motor rotor comprises a rotary shaft, a rotor iron core mounted on the rotary shaft, a permanent magnet embedded on the rotor iron core, and a conductive mouse cage. The rare earth permanent magnetic synchronous motor rotor is characterized in that the permanent magnet is overlapped by a plurality of sheet-shaped or segment-shaped components. The sheet-shaped or segment-shaped components are connected through insulated binder, and epoxy coatings are further covered on the surface of each segment or each sheet of the permanent magnet. The rare earth permanent magnetic synchronous motor rotor can lower eddy current loss of the permanent magnet through overlapping the permanent magnet in sheets or segments, solves the problems that temperature rise of the rare earth permanent magnetic synchronous motor rotor is higher under the behavior of running in long term, leads the motor rotor to run in a certain temperature, further improves the use performance and the service span of the rotor, and confirms the running safety of the rare earth permanent magnetic synchronous motor rotor.

Description

A kind of Rare-earth PMSM Rotor Structure

[technical field]

The utility model relates to technical field of motors, relates in particular to a kind of improvement of Rare-earth PMSM Rotor Structure structure.

[background technology]

Characteristics such as rare-earth permanent-magnet synchronous motor is compared with general induction motor has higher operating efficiency and power factor, and starting torque is big, and carrying capacity is strong, and volume is little, in light weight have widely and use.Rare earth permanent-magnetic material is applied to electromechanics trade, makes motor properties that very big change take place.But in the prior art rare-earth permanent-magnet synchronous motor application process, the Nd-Fe-Bo permanent magnet material that permanent magnet adopts has certain conductivity, can in alternating magnetic field, produce eddy current loss, thereby generation heat, cause rotor temperature rise higher, the neodymium iron boron conductivity of heat is poor in addition, the easy oxidation of magnet steel, gets rusty, make the heat on the magnet steel more be difficult to outside conduction, aggravated epitrochanterian temperature rise.And temperature of rotor is too high, can cause the danger of degaussing to Nd-Fe-B permanent magnet, influences the motor operate as normal, has reduced the useful life of motor.

[utility model content]

Technical problem to be solved in the utility model is the defective that overcomes above-mentioned prior art, provide a kind of when preventing the motor long-play temperature rise too high and reduce the Rare-earth PMSM Rotor Structure structure in useful life.

For reaching above-mentioned utility model purpose, the utility model following technical scheme proposed:

A kind of rare-earth permanent-magnet synchronous motor rotor comprises rotating shaft, is loaded on rotor core in the described rotating shaft, is embedded at permanent magnet and conduction mouse cage on the described rotor core, and described permanent magnet is formed by stacking by a number of plate-shaped or a section shape member.

Preferably, the bonding agent by insulation connects between described each sheet or the section shape permanent magnet.

Preferably, be coated with the epoxy coated layer on described each section of permanent magnet or each the sheet surface.

The utility model passes through permanent magnet burst or the superimposed setting of segmentation, can reduce the eddy current loss of permanent magnet, solved the too high problem of rotor temperature rise of rare earth permanent-magnet synchronization motor under the long-play operating mode, rotor is turned round at a certain temperature, further improve rotor serviceability and useful life, guaranteed the fail safe of rare earth permanent-magnet synchronization motor operation.

[description of drawings]

Fig. 1 is the utility model structure embodiment one;

Fig. 2 is the utility model structure embodiment two.

Among the figure:

The 1-rotor core; The 2-permanent magnet;

3-mouse cage sliver; The 4-rotating shaft.

[embodiment]

In order to make the purpose of this utility model, technical scheme and characteristics more clear,, the utility model is described in further details below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, but and be not used in qualification the utility model.

In the technical field of motors, rare earth permanent-magnet synchronization motor is made up of stator and rotor two big parts at present, and stator mainly comprises stator core, armature winding, is arranged in the housing, and its effect is to produce alternating magnetic field, and supports whole motor.Its middle shell is the part of motor magnetic circuit, adopts the permeability magnetic material manufacturing; Stator core is by adopting well behaved soft magnetic material punching to be overrided to form, being generally flume structure; The armature winding embedding is used for producing electromotive force and by electric current, realizes the conversion of electric energy and mechanical energy in the skewed slot of stator core.Motor windings is generally selected poly-phthalimide QY-2 high temperature resistant wire for use, selects the C class F insulating material F between winding for use, and the resistance to elevated temperatures that can make motor windings like this is up to 220 degrees centigrade.Armature winding adopts the less double-deck short distance distributed winding of harmonic content.Double-deck short distance distributed winding can be selected different spans as required, can reduce a certain high order harmonic component, and it is little that the first-harmonic electromotive force is reduced, thereby has effectively improved the waveform of air-gap field, reduces harmonic loss, reduces temperature rise, and winding is drawn by lead-out wire.In the use three-phase alternating-current supply is connected to lead-out wire, then electric current forms circular rotating field by the stator armature winding in armature winding.Nd-Fe-B permanent magnet on the rotor forms constant permanent magnetic field, the stator field rotation is followed in the rotor field, the rotor rotation direction is identical with the direction of rotation of circular rotating field, under the normal condition, the very fast rotating speed with the stator circular rotating field of rotor speed is identical, reach same leg speed, thereby realized the conversion of AC energy to mechanical energy.

Referring to Fig. 1, Fig. 2, rotor described in the utility model is made of rotor core 1, mouse cage sliver 3, permanent magnet 2 and the rotating shaft 4 of being fixed on the stator case, and permanent magnet 2 is embedded on the rotor core 1.Described rotor core 1 is overrided to form by rotor punching, is installed in the rotating shaft 4, and material is identical with stator material; High strength, non-magnet_conductible material are adopted in described rotating shaft 4, and mouse cage sliver 3 adopts the cast aluminium manufacturing; Described permanent magnet 2 is formed by stacking by number of plate-shaped or section shape member, can be formed by stacking by tangentially being divided into multi-disc as shown in Figure 1, also can be as shown in Figure 2 by radially being divided into a plurality of segments, bonding agent by insulation between each sheet and each section connects, this structure can reduce the eddy current loss that produces owing to the conductivity of Nd-Fe-B permanent magnet 2 in alternating magnetic field, reduce rotor temperature rise, simultaneously, between permanent magnet 2 each sections, take electrophoretic techniques to handle on the surface between each sheet and the sheet, make it to produce certain thickness epoxy coated layer, make permanent magnet obtain good anti-corrosion, to prevent the oxidation of permanent magnet 2, get rusty, and easier outside transmission heat, the heat dispersion of raising motor.On the bonding plane of rotor core 1 and permanent magnet 2, also apply one deck anaerobic adhesive, permanent magnet 2 is embedded in the rotor cores 1, form the stationary magnetic field.Permanent magnet 1 can be selected high performance NdFeB material for use, and remanent magnetism is greater than 1.1T, and coercive force can anti-150 celsius temperatures greater than 680000A/m.It is this that iron B permanent magnetic material magnetic property is good by the emperor himself, thermal conductivity is big, the relatively more general thermal conductivity that adopts is 7.7cal/m.h.0C, the relatively poor NdFeB material of conductivity of heat, can accelerate the transmission of heat on the permanent magnet 1, reduce rotor temperature rise, thereby realized the utility model purpose.

The above embodiment has only expressed two kinds of execution modes of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims

1, a kind of Rare-earth PMSM Rotor Structure comprises rotating shaft, is loaded on rotor core in the described rotating shaft, is embedded at the permanent magnet on the described rotor core, and the conduction mouse cage is characterized in that: described permanent magnet is formed by stacking by a number of plate-shaped or a section shape member.

2, a kind of Rare-earth PMSM Rotor Structure according to claim 1 is characterized in that, the bonding agent by insulation between described each sheet or the section shape permanent magnet connects.

3, a kind of Rare-earth PMSM Rotor Structure according to claim 1 and 2 is characterized in that, is coated with the epoxy coated layer on described each section of permanent magnet or each the sheet surface.