CN210093088U - Rotor structure for embedded permanent magnet motor - Google Patents

Abstract

The utility model relates to a rotor structure for among embedded permanent-magnet machine, it belongs to motor technical field. The utility model discloses a rotor body and motor shaft, rotor body and motor shaft match, set up rotor core and permanent magnet in the rotor body, set up the permanent magnet of a plurality of interval distribution dysmorphism forms on the rotor core, and the axle center side of permanent magnet is equipped with the round internal magnetism structure that opens circuit of disconnection. The utility model has the advantages of simple and reasonable design, reliable and stable, the high-usage, the air gap loss is little, satisfies user's demand.

Description

Rotor structure for embedded permanent magnet motor

Technical Field

The utility model relates to a rotor structure especially relates to a rotor structure for among embedded permanent-magnet machine, and it belongs to motor technical field.

Background

The embedded motor is mainly composed of a stator and a rotor, an inner magnetic circuit on the axis side of the existing permanent magnet does not adopt a disconnection structure, and magnetic flux is easy to leak, large in loss and low in utilization rate in the working process; and the permanent magnet is mostly a cuboid magnet, can not be fine and rotor core cooperation, the air gap loss is big, can not guarantee rotor dynamic balance, and the motor is whole inefficiency.

The invention discloses an invention patent named as 'an IPM rotor of a PMSM motor' in Chinese patent with publication number CN106130220A of 2016, 11 and 16. This patent includes rotor core, rotor pivot and permanent magnet, and the rotor core cover is established in the rotor pivot and with rotor pivot fixed connection, the inside permanent magnet that is equipped with of rotor core, and rotor core's evenly distributed has the convex bellying of a plurality of on the surface, and is adjacent set up sharp portion between the bellying, the bellying is eccentric structure, and the permanent magnet corresponds the setting with the bellying to the tooth's socket torque has been reduced. The permanent magnet in this patent document belongs to the outward appearance and inserts a style of calligraphy and arrange that embedded, and noise vibration is big for this application, and the application place is also different.

Therefore, it is particularly necessary to provide a rotor structure in an embedded permanent magnet motor with reasonable structural design, high utilization rate and small air gap loss.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design simple reasonable, reliable and stable, high-usage, the little rotor structure who is arranged in embedded permanent-magnet machine of air gap loss.

The utility model provides a technical scheme that above-mentioned problem adopted is: this a rotor structure for among embedded permanent-magnet machine, including rotor body and motor shaft, rotor body matches its characterized in that with the motor shaft: a rotor core and permanent magnets are arranged in the rotor body, and a plurality of permanent magnets distributed at equal intervals are arranged on the rotor core.

Preferably, the inner axis side of the permanent magnet is provided with a round inner magnetic circuit breaking structure for breaking.

Preferably, the permanent magnet shape of the present invention adopts a special shape, for example: trapezoidal, triangular, semicircular and irregular shapes

As a priority, rotor core is last to set up a plurality of special-shaped slot holes with special-shaped magnet matched with

Preferably, the rotor of the present invention is provided with a plurality of magnetic path regulation grooves on the inner side thereof.

Preferably, rotor core is last to set up many clearance distribution's arc groove.

Preferably, the rotor core is provided with a plurality of eccentric circles with different axial centers.

Compared with the prior art, the utility model, have following advantage and effect: the whole structure is simple and reasonable in design, stable and reliable, the utilization rate of the magnetic flux density beam of the magnet is high, and the loss is small; the magnetic circuit regulation groove reduces noise and vibration, and the overall efficiency of the motor is high; the internal magnetic open circuit structure prevents leakage of magnetic flux, reduces loss, improves the magnetic flux utilization rate of a magnetic circuit, and reduces the risk of demagnetization of the motor.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: the rotor comprises a rotor body 1, a motor shaft 2, a permanent magnet 3, a rotor iron core 4, a slotted hole 5, a magnetic circuit regulation groove 6, a non-coaxial eccentric circle 7 and an internal magnetic circuit breaking structure 8.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1, the rotor structure for an embedded permanent magnet motor in this embodiment includes a rotor body 1 and a motor shaft 2, the rotor body 1 is matched with the motor shaft 2, a rotor core 4 and permanent magnets 3 are disposed in the rotor body 1, a plurality of permanent magnets 3 are disposed on the rotor core 4 at equal intervals,

the axle center side of this embodiment permanent magnet 3 is equipped with round internal magnetic circuit breaking structure 8 of disconnection, sets up elastic material on this internal magnetic circuit breaking structure 8, and elastic material has insulating properties, and this elastic material adopts elastic material such as rubber, PBT or nylon.

The permanent magnet 3 of the present embodiment takes trapezoidal, triangular, circular and irregular (non-rectangular parallelepiped) shapes; the permanent magnet 3 is made of one of sintered (rare earth) ferrite or plastic magnetic ferrite.

The rotor of the present embodiment is provided with a plurality of magnetic path regulation grooves 6 on the inner side; the magnetic circuit regulation groove 6 reduces noise, prevents vibration and has high integral efficiency of the motor

The rotor core 4 of the present embodiment is provided with a plurality of arc grooves distributed at intervals; a plurality of non-coaxial eccentric circles 7 are arranged on the rotor iron core 4; so that the loss is small and the utilization rate is high.

The rotor body 1 of the present embodiment is provided with a plurality of slots 5 matched with the permanent magnets 3.

The rotor iron core for fixing the motor shaft is convenient to replace; the rotor core convenient to replace is suitable for the requirements of different motor shaft bodies, and the motor is more widely applied.

The magnetic path regulating groove of the embodiment is configured selectively or not according to the actual use requirement.

The permanent magnet of the present embodiment is selectively changed in the oblique polarity in accordance with the shape of the rotor core.

And will be apparent to those skilled in the art from the foregoing description.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (5)

1. The utility model provides a rotor structure for among embedded permanent-magnet machine, includes rotor body and motor shaft, rotor body matches its characterized in that with the motor shaft: a rotor core and permanent magnets are arranged in the rotor body, and a plurality of irregularly-shaped permanent magnets are distributed on the rotor core at intervals; the rotor body is provided with a plurality of slotted holes matched with the permanent magnets; the rotor core is provided with a plurality of arc grooves distributed at intervals.

2. The rotor structure of claim 1, wherein: and a circle of disconnected internal magnetic open circuit structure is arranged on the axis side of the permanent magnet.

3. The rotor structure of claim 1, wherein: the inner side of the rotor is provided with a plurality of magnetic path regulation grooves.

4. The rotor structure of claim 1, wherein: and a plurality of non-coaxial eccentric circles are arranged on the rotor iron core.

5. The rotor structure of claim 1 or 2, wherein: the permanent magnet adopts a non-cuboid special-shaped structure.