CN205489861U - Rotor of permanent magnet motor and permanent magnet motor - Google Patents

Abstract

An object of the utility model is to provide a rotor of permanent magnet motor and permanent magnet motor, main aim at promotes the stationarity of motor. This permanent -magnet machine rotor includes rotor core and edge a plurality of permanent magnets of rotor core circumference evenly distributed, rotor core includes an outer fringe section in the outer fringe relative with every permanent magnet, the side segmental arc of segmental arc both sides was being kept away from in the middle of the outer fringe section included middle segmental arc and is located in the direction of the central line of outer fringe section the side segmental arc is extended towards the center directions who is close rotor core. Through establishing the outer fringe section into including the multistage segmental arc, reducible torque ripple makes the motor operation more steady.

Description

A kind of permanent magnet machine rotor and magneto

Technical field

This utility model relates to machine field, is specifically related to a kind of permanent magnet machine rotor and magneto.

Background technology

The rotor periphery of traditional built-in permanent magnetic motor is generally full circle, the air gap such as between stator and rotor.The permanent magnet of embedded structure is uniformly distributed and embeds rotor close to the position of outer surface, although can overcome in running the shortcomings such as poor reliability, but voltage-form distortion rate and torque pulsation are relatively big, run the most steady.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of permanent magnet machine rotor improving motor running stability.

For reaching this purpose, this utility model by the following technical solutions:

A kind of permanent magnet machine rotor, including rotor core with along the described rotor core equally distributed multiple permanent magnets of circumference, it is characterized in that: described rotor core includes an outer rim segment in the outer rim relative with each permanent magnet, described outer rim segment includes middle segmental arc and is positioned at the side segmental arc of middle segmental arc both sides, and on the direction of the center line away from described outer rim segment, described side segmental arc extends towards the center position close to rotor core.

Preferably, in aforesaid permanent magnet machine rotor, described side segmental arc is two, lays respectively at the both sides of described middle segmental arc, and said two side segmental arc is symmetrical relative to the center line of described middle segmental arc.

Preferably, in aforesaid permanent magnet machine rotor, the center of circle of described middle segmental arc and the centres of described rotor core or the most concentric.

Preferably, in aforesaid permanent magnet machine rotor, described permanent magnet on described rotor core radially or evenly distributed.

Preferably, in aforesaid permanent magnet machine rotor, the center of circle of described side segmental arc is deviateed the center line of described middle segmental arc and is arranged, and the side segmental arc of the center of circle of described side segmental arc and its correspondence is positioned at the same side of center line of described middle segmental arc.

Preferably, in aforesaid permanent magnet machine rotor, the radius of described side segmental arc is obtained by following publicity:

$r2=\sqrt{r{1}^2+d{1}^2+d{2}^2-h1*d1-2*d2\sqrt{r{1}^2-\frac{h{1}^2}{4}}}$

Wherein, r1 is the radius of described middle segmental arc, d1 is the center of circle vertical dimension to the center line of described middle segmental arc of described side segmental arc, d2 is the center of circle of the described side segmental arc distance in the center of circle of the most described middle segmental arc in direction at the center line place of described middle segmental arc, and h1 is the width of described middle segmental arc.

Preferably, in aforesaid permanent magnet machine rotor, adjacent permanent magnet poles is alternately distributed.

A kind of magneto, including aforesaid permanent magnet machine rotor.

The beneficial effects of the utility model are:

1, by outer rim segment is set to the structure of multistage, it is achieved the gas length between by stator and rotor is Sine distribution, and torque pulsation is little, motor is made to run more steady.

2, the counter potential waveform sine degree of motor increases, and harmonic content reduces, lower noise, good reliability.

Accompanying drawing explanation

By description to this utility model embodiment referring to the drawings, of the present utility model above-mentioned and other objects, features and advantages will be apparent from, in the accompanying drawings:

Fig. 1 is the structural representation of the permanent magnet machine rotor of the application.

Fig. 2 is the partial schematic diagram of the permanent magnet machine rotor of the application.

Fig. 3 is the overall structure figure of the permanent magnet machine rotor of the application.

Fig. 4 is the structural representation of another embodiment of the permanent magnet machine rotor of the application.

Fig. 5 be permanent magnet machine rotor and the stator of the application coordinate schematic diagram.

Detailed description of the invention

Below based on embodiment, this utility model is described, but this utility model is not restricted to these embodiments.In below details of the present utility model being described, detailed describe some specific detail sections.The description not having these detail sections for a person skilled in the art can also understand this utility model completely.In order to avoid obscuring essence of the present utility model, the narration the most in detail of known method, process, flow process, element.

Embodiment one

Embodiment one relates to a kind of permanent magnet machine rotor, and the most as shown in figures 1-5, rotor includes rotor core 1 and permanent magnet, and permanent magnet is embedded on this rotor core along the circumference of rotor core 1.Permanent magnet arrangement on rotor core 1 has arranged tangential and radial arrangement two ways.In fig. 1-3, permanent magnet uses the mode of arranged tangential, multiple permanent magnets 21 circumferentially relative to rotor core centrally along being tangentially evenly arranged on rotor core 1.Also has a kind of mode such as Fig. 4, as shown in 5, multiple permanent magnets 22 being arranged on rotor core 1 centrally along radially uniform relative to rotor core.As illustrated in fig. 1-3, described rotor core 1 includes an outer rim segment in the outer rim relative with each permanent magnet 21, described outer rim segment includes middle segmental arc A1 and is positioned at the side segmental arc of middle segmental arc both sides, on the direction of the center line away from described outer rim segment, described side segmental arc extends towards the center position close to rotor core, and multiple outer rim segment are centrosymmetric distribution relative to the center of rotor core.Middle segmental arc A1 is positioned at the centre of outer rim segment, it is preferred that outer rim segment is overall symmetrical relative to the center line 13 of middle segmental arc A1.Quantity in the side segmental arc of the side of middle segmental arc can be one section or multistage.By so arranging, when rotor coordinates with stator 3, the gas length between stator 3, rotor can be made in substantially Sine distribution, as shown in Figure 5, make winding back emf Waveform sine increase, reduce harmonic content, effectively reduce motor noise, reduce motor torque ripple, make motor run more steady.

Preferably, side segmental arc is two, including the first side segmental arc A2 and the second side segmental arc A3, is separately positioned on the both sides of middle segmental arc A1, and two side segmental arcs A2, A3 are symmetrical relative to the center line 13 of described middle segmental arc A1.

Preferably, the center of circle o1 of middle segmental arc and the centres of rotor core or the most concentric, in the present embodiment, the center of circle o1 of middle segmental arc and the centres of rotor core, but it is not limited to this, the center of circle o1 of middle segmental arc can not also be concentric with the center of rotor core, and now, the radius r1 of middle segmental arc A1 is less than the radius of rotor core.

The same side of the center line of described middle segmental arc it is positioned at as one preferably embodiment, the center line setting of the described middle segmental arc of center of circle deviation of side segmental arc, and the side segmental arc of the center of circle of described side segmental arc and its correspondence.As shown in fig. 1, the center of circle of the first side segmental arc A2 is deviateed the center line of described middle segmental arc and is arranged, and it is positioned at the same side of center line of middle segmental arc with the first side segmental arc A2.Wherein the center of circle o2 of the first side segmental arc A2 has eccentric distance d1, d2 relative to the center of circle o1 of middle segmental arc A1, concrete, the center of circle o2 of the first side segmental arc A2 is d1 to the vertical dimension of the center line 13 of described middle segmental arc A1, the center of circle o2 of the first side segmental arc A2 is d2 in the distance of the center of circle o1 of the most described middle segmental arc A1 in direction at center line 13 place of described middle segmental arc A1, as shown in fig. 1.The center of circle of the second side segmental arc A3 and the center of circle o2 of the first side segmental arc A2 are relative to center line 13 centrosymmetry of described middle segmental arc A1.The radius of middle segmental arc A1 is r1, the width of middle segmental arc, and namely the distance between middle segmental arc and the intersection point 11,12 of side segmental arc is h1, as shown in Figure 2.

By presetting the value of d1, d2, r1 and h1, can by the radius r2 of following formula (1) calculation side segmental arc, formula (1) particularly as follows:

$r2=\sqrt{r{1}^2+d{1}^2+d{2}^2-h1*d1-2*d2\sqrt{r{1}^2-\frac{h{1}^2}{4}}}$

When, after the radius r2 calculating side segmental arc, according to the value of default d1, d2, r1 and h1, the shape of the motor rotor core of magnetic field requirements being met.

Preferably, the numerical value of the width h1 of middle segmental arc can be calculated by following formula,Wherein h2 is the width of magnetic shoe, observes, the specially distance between outer arc segments two-end-point from figure.

The flow process of the method for designing of the permanent magnet machine rotor in the present embodiment being introduced below, the design method comprises the following steps:

The first step: requiring that index Design chooses suitable stator core according to technology, its internal diameter is r3, determines minimal air gap length, for δ, i.e. can determine that rotor core maximum outside diameter, namely the radius r1, wherein r1=r3-δ of middle segmental arc A1；

Second step: after determining the middle segmental arc A1 radius r1 of motor rotor core, chooses the center of circle of suitable side segmental arc relative to eccentric distance d1, d2 of the center of circle o1 of middle segmental arc A1 and the width h1 value of middle segmental arc.Preferably, the width h1 of middle segmental arc can approximate and take magnetic shoe width h2'sN is the number of the segmental arc that outer rim segment has, and uses three sections of circular arcs in present embodiment, and n value is 3；

3rd step: design side segmental arc radius r2 according to formula (1)；

4th step: permanent magnet 21 or 22 is embedded on rotor core 1 formation rotor unit successively by N, S polarity is alternate.

Additionally, it should be understood by one skilled in the art that accompanying drawing is provided to descriptive purpose provided herein, and accompanying drawing is not necessarily drawn to scale.

It will also be appreciated that example embodiment is provided, so that the disclosure is comprehensive, and its scope is fully conveyed to those skilled in the art.A lot of specific detail (such as particular elements, equipment and the example of method) are presented to provide thorough understanding of the disclosure.It will be apparent to one skilled in the art that and need not use specific detail, example embodiment can be carried out with the most different forms, and example embodiment is understood not to limit the scope of the present disclosure.In some example embodiments, it is thus well known that device structure and widely-known technique are not described in.

Claims (8)

1. a permanent magnet machine rotor, including rotor core with along the described rotor core equally distributed multiple permanent magnets of circumference, it is characterized in that: described rotor core includes an outer rim segment in the outer rim relative with each permanent magnet, described outer rim segment includes middle segmental arc and is positioned at the side segmental arc of middle segmental arc both sides, and on the direction of the center line away from described outer rim segment, described side segmental arc extends towards the center position close to rotor core.

2. permanent magnet machine rotor as claimed in claim 1, it is characterised in that: described side segmental arc is two, lays respectively at the both sides of described middle segmental arc, and said two side segmental arc is symmetrical relative to the center line of described middle segmental arc.

3. permanent magnet machine rotor as claimed in claim 2, it is characterised in that: the center of circle of described middle segmental arc and the centres of described rotor core or the most concentric.

4. permanent magnet machine rotor as claimed in claim 1, it is characterised in that: described permanent magnet on described rotor core radially or evenly distributed.

5. permanent magnet machine rotor as claimed in claim 2, it is characterised in that: the center of circle of described side segmental arc is deviateed the center line of described middle segmental arc and is arranged, and the side segmental arc of the center of circle of described side segmental arc and its correspondence is positioned at the same side of center line of described middle segmental arc.

6. permanent magnet machine rotor as claimed in claim 5, it is characterised in that: the radius r2 of described side segmental arc is obtained by following publicity:

Wherein, r1 is the radius of described middle segmental arc, d1 is the center of circle vertical dimension to the center line of described middle segmental arc of described side segmental arc, d2 is the center of circle of the described side segmental arc distance in the center of circle of the most described middle segmental arc in direction at the center line place of described middle segmental arc, and h1 is the width of described middle segmental arc.

7. permanent magnet machine rotor as claimed in claim 1, it is characterised in that: adjacent permanent magnet poles is alternately distributed.

8. a magneto, it is characterised in that: include the permanent magnet machine rotor as according to any one of claim 1-7.