CN202550728U

CN202550728U - Rotor punching sheet structure of permanent-magnet synchronous motor

Info

Publication number: CN202550728U
Application number: CN201220079727XU
Authority: CN
Inventors: 王严; 何敏; 肖文明; 周福兵
Original assignee: SHENZHEN FELLER MAGTECH Corp
Current assignee: SHENZHEN FELLER MAGTECH Corp
Priority date: 2012-03-06
Filing date: 2012-03-06
Publication date: 2012-11-21
Anticipated expiration: 2022-03-06

Abstract

A rotor punching sheet structure of a permanent-magnet synchronous motor comprises a rotor punching sheet integrally circular. The circular rotor punching sheet is provided with through grooves embedded with permanent magnets, and the through grooves are uniformly circumferentially distributed around a central rotary shaft and on the rotor punching sheet. The rotor punching sheet structure of the permanent-magnet synchronous motor is characterized in that each through groove is a U-shaped groove composited on the end face to be capable of holding three permanent magnets. The grooves composited with the permanent magnets can hold three permanent magnets, so that the surface areas of the permanent magnets are enlarged, and air gap magnetic density is higher. Further, the grooves with the permanent magnets are integrated with magnet-insulation air gaps, contact areas of the lateral sides of the permanent magnets and the rotor punching sheet are reduced, so that the permanent magnets can be mounted in more easily, and utilization rate of the permanent magnets is improved.

Description

Permanent-magnetic synchronous motor rotor punching structure

[technical field]

The utility model relates to the variable frequency speed-adjusting permanent magnet synchronous machine, relates in particular to variable frequency speed-adjusting permanent magnet synchronous electric motor rotor punching structure Design.

[background technology]

Variable frequency speed-adjusting permanent magnet synchronous electric motor rotor magnetic structure mainly is divided into surface-type rotor magnetic circuit structural and built-in rotor magnetic structure at present.The rotor punching structure of using in the surface-type rotor magnetic circuit structural is the simplest, but permanent magnet be with sticker in that built up rotor core by rotor punching lip-deep, the long-term back glue that uses can ageing failure; Permanent magnet flies out under centrifugal action when motor rotates; Cause motor to damage, increase the non-magnet material protective jacket, then can increase air gap as stopping the surface at permanent magnetism; Reduce the permanent magnet utilance, increase technology difficulty simultaneously.The rotor punching relative complex of using in the built-in rotor magnetic structure; The nearly excircle of punching place dashes has through hole; Build up formation groove in back unshakable in one's determination and be used to insert permanent magnet, through hole is good more near rotor punching excircle effect more in theory, and the narrow limit between the outer of through hole outer and circular punching will be narrow like this; Can reduce leakage field; Improve the permanent magnet utilance, but will bring very big difficulty for rotor-core lamination die-cut, can have problems such as structural strength is not enough simultaneously when narrow limit is too narrow to a certain degree.

[summary of the invention]

The utility model has proposed a kind ofly can guarantee mechanical structure intensity, reduce inner leakage field problem to above problem, and is simple during frock.

The technical scheme of the utility model is: a kind of permanent-magnetic synchronous motor rotor punching structure; Comprise the whole circular rotor punching that is; In this circle punching, be provided with the groove of built-in permanent magnet; Above-mentioned groove evenly distributes around the central rotating shaft circumference on rotor punching, it is characterized in that, said groove is on end face, to be combined into the U type groove that can hold three sections permanent magnets.

Best mode is to arrange 4,6,8 even numbers U type grooves in a circumferential direction.

One section permanent magnet is held in each setting of two arms of said U type groove and bottom, and between two arms and bottom, has one section respectively at a distance from magnetic air gap.

Said is integrated design at a distance from magnetic air gap with the groove that holds permanent magnet.

The beneficial effect of the utility model is: the composite permanent magnet groove can hold three sections permanent magnets; Increased the surface area of permanent magnet; Make air gap flux density higher, and permanent magnet trough and at a distance from magnetic air gap be integrated design, reduced the contact area of permanent magnet side and punching; Be easier to permanent magnet and pack into, improved the utilance of permanent magnet.

[description of drawings]

Fig. 1 is the utility model one example structure sketch map;

Fig. 2 is the structural representation of U type groove in this instance.

Wherein: 1, U type groove; 2, rotor punching; 3, outer at a distance from the magnetic magnetic bridge; 4, shaft hole; 5, permanent magnet; 6, at a distance from magnetic air gap.

[embodiment]

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.

Embodiment 1:

A kind of permanent-magnetic synchronous motor rotor punching structure; Comprise the whole circular rotor punching 2 that is; In this round rotor punching 2, be provided with the groove of built-in permanent magnet; Above-mentioned groove evenly distributes around the central rotating shaft circumference on rotor punching 2, it is characterized in that, said groove is on end face, to be combined into the U type groove 1 that can hold three sections permanent magnets.In structural representation, be to have arranged 4 U type grooves 1, form 4 couples of N, the S utmost point according to the assembling of the distribution arrangement of magnetic pole, separated magnetic magnetic bridge 3 is the shaft holes 4 that have keyway in rotor punching 2 centers outside U type groove 1 arm has with circular punching circumferential edges place.

One section permanent magnet is held in each setting of two arms of said U type groove and bottom, has placed three sections permanent magnets 5 so in U type groove 1, design altogether, and between two arms and bottom, has had one section respectively at a distance from magnetic air gap 6.The separated magnetic air gap 6 that contains at U type groove 1 can improve the utilance of permanent magnet 5.Placing in the U type groove 1 is three sections permanent magnets 5, has increased the surface area of permanent magnet 5, makes air gap flux density higher, and said is integrated design at a distance from magnetic air gap 6 with the groove that holds permanent magnet.

Claims

1. permanent-magnetic synchronous motor rotor punching structure; Comprise the whole circular rotor punching that is; In this circle punching, be provided with the groove of built-in permanent magnet; Above-mentioned groove evenly distributes around the central rotating shaft circumference on rotor punching, it is characterized in that, said groove is on end face, to be combined into the U type groove that can hold three sections permanent magnets.

2. according to the said permanent-magnetic synchronous motor rotor punching of claim 1 structure, it is characterized in that one section permanent magnet is held in each setting of two arms of U type groove and bottom, and between two arms and bottom, has one section respectively at a distance from magnetic air gap.

3. according to the said permanent-magnetic synchronous motor rotor punching of claim 1 structure, it is characterized in that said is integrated design at a distance from magnetic air gap with the groove that holds permanent magnet.