CN205986394U - Permanent -magnet machine and compressor - Google Patents

Abstract

The utility model discloses a permanent -magnet machine and compressor, permanent -magnet machine include rotor core and stator core, and rotor core distributes along the circumferencial direction to be had a plurality of magnet cell forever and set up in each flux barrier of magnet cell's both sides forever, and stator core distributes along the circumferencial direction has a plurality of stator slots, has tooth boots structure between two arbitrary adjacent stator slots, and the both sides that the medial surface at stator core's center is close to to each tooth boots structure are the tangent plane structure. The utility model discloses the magnetic flow that the permanent magnet produced can reduce the air -gap permeance change because the flux barrier of rotor and the tangent plane structure of tooth boots structure obtain the adjustment and improve, reduces the tooth's socket torque of motor to reduce motor noise and vibration. Furthermore, the utility model provides a motor need not to go on complicated technology, and it can towards piece and rotor punching only to need to design the stator.

Description

A kind of magneto and compressor

Technical field

This utility model is related to technical field of motors, more particularly, it relates to a kind of magneto and compressor.

Background technology

Interior permanent magnet machines are widely used because it has higher efficiency, and interior permanent magnet machines are due to permanent magnet Interaction and slotted armature iron core between, can produce cogging torque, and then produces vibration and noise, the control of impact system Precision.Therefore, cogging torque must be weakened using corresponding method in design of electrical motor.

In prior art, stator and rotor skewed slot commonly employed in the art can suppress cogging torque, but electric machine structure is complicated, meeting Increase difficulty of processing, and reduce the output electromagnetic torque of motor to a certain extent, so that motor performance is declined.In addition, ability Domain also has to suppress cogging torque by the way of stator closed slot, but this kind of mode complex process, offline difficulty.

Therefore, how on the basis of guarantee output torque does not decline, do not increase manufacturing process difficulty, reduce the tooth of motor Groove torque, becomes those skilled in the art's important technological problems to be solved.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of magneto, and it can ensure output torque not Decline, do not increase manufacturing process difficulty on the basis of, reduce motor cogging torque.The purpose of this utility model also resides in offer A kind of compressor including above-mentioned magneto.

A kind of magneto that this utility model provides, including rotor core and stator core, described rotor core is provided with The multiple permanent magnet trough being along the circumferential direction distributed and the magnet isolation tank of the both sides being opened in each described permanent magnet trough, described fixed Sub- iron core is along the circumferential direction distributed with multiple stator slots, has tooth boots structure, respectively between two described stator slots of arbitrary neighborhood The both sides of the medial surface of individual described tooth boots structure are incisal plane structure；In the same cross section of described motor, described incisal plane Structure is P point, the side extended line of stator slot and the inner circle intersection point of described stator core with the inner circle intersection point of described stator core For Q point, the folder between the line in the center of circle of described P point and described stator core and the two adjacent line of symmetries of described stator slot Angle is φ, the folder between the line in described Q point and the center of circle of described stator core and the line of symmetry of two adjacent described stator slots Angle is θ 1, the notch outer of the described stator slot described stator slot adjacent with the line in the center of circle of described stator core and two Angle between line of symmetry is a, the line in the edge of described magnet isolation tank and the center of circle of described stator core and two adjacent described Angle between the line of symmetry of stator slot is θ；Wherein ,≤1.5 ° of | a- θ |, and, 0.55≤(θ+θ 1)/φ≤0.75.

Preferably, the width of described magnet isolation tank is H, and, 0.9 millimeter of 0.7 millimeter of ＜ H ＜.

Preferably, it is trapezoidal recessed for offering cross section between two permanent magnet trough of the arbitrary neighborhood of described rotor core Groove.

Preferably, the depth of described groove is less than the position of the bottom of described permanent magnet trough.

Preferably, arbitrarily described permanent magnet trough offers two every bore at the outer rim of described rotor core, and two Individual described it is symmetric for line of symmetry with the line of symmetry of described permanent magnet trough every bore.

Preferably, described is mounting hole every bore, and the described width every bore is N, every the centre bit of bore described in two The distance between putting is M, and 0.6 millimeter≤N≤1 millimeter, 4 millimeters≤M≤5 millimeter.

This utility model additionally provides a kind of compressor, and including magneto, described magneto is as above any one institute The magneto stated.

In the technical scheme that this utility model provides, tie by by tooth boots structure setting incisal plane structure and to incisal plane The angle of structure has carried out particular determination, in addition, entering to the setting angle at the notch outer of stator slot, the edge of the magnet isolation tank of rotor Row optimization design, is arranged such, and the magnetic flux that permanent magnet produces can be due to the incisal plane structure of the magnet isolation tank of rotor and tooth boots structure It is adjusted and improves, reducing air-gap permeance change, reducing the cogging torque of motor, thus reducing noise of motor and vibration. And, the motor that this utility model provides, the technique that need not carry out complexity, only need to design stator punching and rotor punching.

Brief description

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic diagram that in this utility model embodiment, rotor core and stator core match；

Fig. 2 is all angles schematic diagram being related in this utility model embodiment；

Fig. 3 is the width indication figure of magnet isolation tank in this utility model embodiment；

Fig. 4 is the schematic diagram of this utility model embodiment further groove；

Fig. 5 is the schematic diagram in this utility model embodiment every bore；

In Fig. 1-Fig. 5：

Rotor core 11, stator core 12, permanent magnet trough 13, magnet isolation tank 14, tooth boots structure 15, incisal plane Structure 16, stator slot 17, groove 18, every bore 19.

Specific embodiment

The core of this specific embodiment is to provide a kind of magneto, its can ensure output torque not decline, On the basis of not increasing manufacturing process difficulty, reduce the cogging torque of motor.Another core of this specific embodiment is to carry For a kind of compressor including above-mentioned magneto.

Hereinafter, referring to the drawings embodiment is illustrated.Additionally, embodiments illustrated below is not to described in claim Utility model content play any restriction effect.In addition, the full content of the composition represented by example below is not limited to conduct Necessary to the solution of the utility model described in claim.

Refer to Fig. 1-Fig. 5, a kind of magneto that the present embodiment provides, including rotor core 11 and stator core 12. Wherein, rotor core 11 is along the circumferential direction distributed with multiple permanent magnet trough 13, is provided with permanent magnet in each permanent magnet trough 13, this In embodiment, all offer magnet isolation tank 14 in two side positions of each permanent magnet trough 13.

Stator core 12 is along the circumferential direction distributed with multiple stator slots 17, has between two stator slots 17 of arbitrary neighborhood Boots structure 15 with teeth.

It should be noted that unlike the prior art, the both sides of the medial surface of each tooth boots structure 15 in the present embodiment Position is provided with incisal plane structure 16.The medial surface of above-mentioned tooth boots structure 15 refers to the side of the central part near stator core 12. After carrying out incisal plane to the both sides position of the medial surface of tooth boots structure 15, the medial surface of tooth boots structure 15 includes middle part Arcwall face and the incisal plane at both sides position.

In the same cross section of motor, the incisal plane structure 16 of above-mentioned tooth boots structure 15 is handed over the inner circle of stator core 12 Point is P point.The side extended line of stator slot 17 and the inner circle intersection point of stator core 12 are Q point.

Angle between the line in the center of circle of above-mentioned P point and stator core 12 and the two adjacent line of symmetries of stator slot 17 For φ, it should be noted that all there is line of symmetry due in the middle of two often adjacent stator slots 17, and above-mentioned two adjacent stators The line of symmetry of groove 17, is the line of symmetry closest with P point.

Angle between the line in above-mentioned Q point and the center of circle of stator core 12 and the line of symmetry of two adjacent stator slots 17 For θ 1, equally, the line of symmetry of above-mentioned two adjacent stator slots 17, is the line of symmetry closest with Q point.

In the present embodiment, the notch outer of stator slot 17 and the line in the center of circle of stator core 12 and two adjacent stators Angle between the line of symmetry of groove 17 is a.It should be noted that the notch of said stator groove 17 refers to towards stator core 12 The opening of central part, equally, the line of symmetry of above-mentioned two adjacent stator slots 17 refers to the notch outer with stator slot 17 and stator The closest line of symmetry of the line in the center of circle of iron core 12.

Between the line in the edge of magnet isolation tank 14 and the center of circle of stator core 12 and the line of symmetry of two adjacent stator slots 17 Angle be θ；The line of symmetry of above-mentioned two adjacent stator slots 17, refers to the center of circle at the edge with magnet isolation tank 14 and stator core 12 The closest line of symmetry of line.

It is important to note that above-mentioned parameters, meet following condition：

≤ 1.5 ° of | a- θ |, and, 0.55≤(θ+θ 1)/φ≤0.75.

Be arranged such, the present embodiment provide technical scheme in, by by tooth boots structure 15 arrange incisal plane structure 16 and Particular determination has been carried out to the angle of incisal plane structure 16, in addition, to the notch outer of stator slot 17, the magnet isolation tank 14 of rotor The setting angle at edge is optimized design, and the magnetic flux that permanent magnet produces can be due to the magnet isolation tank 14 of rotor and tooth boots structure 15 Incisal plane structure 16 is adjusted and improves, and reducing air-gap permeance change, reducing the cogging torque of motor, thus reducing motor Noise and vibration.And, the motor that the present embodiment provides, the technique that need not carry out complexity, only need to design stator punching and rotor Punching.

The technical scheme that the present embodiment provides, can be greatly reduced cogging torque, and then reduces noise of motor and vibration.Using The motor cogging torque of the present embodiment technology substantially reduces, and compared to original technology, cogging torque have dropped 80% about.

Magnet isolation tank 14 between magnetic pole plays the effect improving magnetic circuit trend, when its width H is designed as 0.7mm<H<0.9mm When, ensure that the crudy of magnet isolation tank 14, and so that the change of air-gap flux is optimized.

More excellent, offering downward cross section between the magnetic pole of rotor core 11 is trapezoidal groove 18, the depth of groove 18 Degree, less than the position of the bottom of permanent magnet trough 13, so can reduce the leakage magnetic flux between permanent magnet, lifts torque.

In the preferred version of the present embodiment, permanent magnet trough 13 opens up a pair every bore near the cylindrical place of rotor core 11 19, magnetic circuit trend can be affected further, and when full every the width N of bore 19, two length M every bore 19 center During foot row condition：

0.6 millimeter≤N≤1 millimeter, 4 millimeters≤M≤5 millimeter, can affect magnetic field makes it be distributed according to certain rules, optimizes Magnetic circuit, reduces cogging torque.

The present embodiment additionally provides a kind of compressor including above-mentioned magneto, is arranged such, and its motor can protected On the basis of card output torque does not decline, do not increase manufacturing process difficulty, reduce the cogging torque of motor.The pushing away of this beneficial effect The derivation leading the beneficial effect that process is brought with above-mentioned magneto is substantially similar, therefore repeats no more herein.

Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or new using this practicality Type.Multiple modifications to these embodiments will be apparent from for those skilled in the art, is determined herein The General Principle of justice can be realized in the case of without departing from spirit or scope of the present utility model in other embodiments.Cause This, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein The wide scope consistent with features of novelty.

Claims (7)

1. a kind of magneto is it is characterised in that include rotor core (11) and stator core (12), described rotor core (11) Be provided with the multiple permanent magnet trough (13) being along the circumferential direction distributed and be opened in the both sides of each described permanent magnet trough (13) every Magnetic groove (14), described stator core (12) is along the circumferential direction distributed with multiple stator slots (17), and two of arbitrary neighborhood described fixed There is between pilot trench (17) tooth boots structure (15), the both sides of the medial surface of each described tooth boots structure (15) are incisal plane structure (16)；In the same cross section of described motor, the inner circle intersection point of described incisal plane structure (16) and described stator core (12) For P point, the side extended line of stator slot (17) is Q point with the inner circle intersection point of described stator core (12), described P point and described fixed Angle between the line in the center of circle of sub- iron core (12) and the two adjacent line of symmetries of described stator slot (17) is φ, described Q point Angle between the line in the center of circle of described stator core (12) and the line of symmetry of two adjacent described stator slots (17) is θ 1, the notch outer of described stator slot (17) and the line in the center of circle of described stator core (12) and two adjacent described stator slots (17) the angle between line of symmetry is a, the line in the center of circle of the edge of described magnet isolation tank (14) and described stator core (12), And two the angle between the adjacent line of symmetry of described stator slot (17) be θ；Wherein ,≤1.5 ° of | a- θ |, and, 0.55≤(θ+θ 1)/φ≤0.75.

2. magneto as claimed in claim 1 it is characterised in that described magnet isolation tank (14) width be H, and, 0.7 millimeter 0.9 millimeter of ＜ H ＜.

3. magneto as claimed in claim 1 it is characterised in that two of the arbitrary neighborhood of described rotor core (11) forever Offering cross section between magnet slot (13) is trapezoidal groove (18).

4. magneto as claimed in claim 3 is it is characterised in that the depth of described groove (18) is less than described permanent magnet The position of the bottom of groove (13).

5. magneto as claimed in claim 1 is it is characterised in that arbitrarily described permanent magnet trough (13) is near described rotor ferrum Two are offered every bore (19) at the outer rim of core (11), and right with described permanent magnet trough (13) every bore (19) described in two Line is called that line of symmetry is symmetric.

6. magneto as claimed in claim 5 it is characterised in that described every bore (19) be mounting hole, described every bore (19) width is N, described in two every the distance between center of bore (19) be M, and 0.6 millimeter≤N≤1 millimeter, 4 Millimeter≤M≤5 millimeter.

7. a kind of compressor, including magneto it is characterised in that described magneto is as any one of claim 1-6 institute The magneto stated.