CN103427508A - Segmental skew notch concentrated winding motor, electric generator and electric motor - Google Patents
Segmental skew notch concentrated winding motor, electric generator and electric motor Download PDFInfo
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Abstract
The invention relates to a segmental skew notch concentrated winding motor, an electric generator and an electric motor. According to the segmental skew notch concentrated winding motor, 2P pieces of magnetic steel with North poles and South poles distributed alternatively are arranged on a rotor yoke of the segmental skew notch concentrated winding motor, the space between every two adjacent pieces of magnetic steel is Sm, a stator core is provided with Z grooves and Z stator teeth, and the relationship between the rabbet width Sc between every two adjacent stator teeth of the concentrated winding motor and the space Sm between every two adjacent pieces of magnetic steel of the concentrated winding motor satisfies the equation: Sm/Sc=(0.83-1.3); the ratio of the width Tau m of each piece of magnetic steel to the polar distance Tau satisfies the inequation: Tau m/Tau>=(0.75-0.9); the stator core is a straight flute, and rabbets of the stator core symmetrically skew by certain mechanical angles in a segmental mode in the axial direction of the stator core. According to the segmental skew notch concentrated winding motor, the electric generator and the electric motor, location torque frequency is improved by means of numerical optimization matching between magnetic steel spacing and rabbet spacing, the location torque amplitude is restrained, the sinusoidal property of the air-gap magnetic field is good, the location torque of the motor is small, the rabbets of the motor can fully meet the requirements of direct and full-automatic winding, and therefore production is facilitated.
Description
Technical field
The present invention relates to concentrate the magneto of winding, be specifically related to a kind of segmentation skew notch and concentrate winding electric machine, generator and motor.
Background technology
The rotor of magneto generally adopts rare-earth permanent magnet, for example Nd-Fe-B permanent magnet.Rare-earth permanent magnet material is just more and more rare, and price is more and more expensive, therefore the essential utilance that reduces the consumption of permanent magnet and improve permanent magnet.
The magneto of concentrated winding can improve the energy index of magneto significantly, such as: winding utilization, efficiency, power to volume ratio, moment volume ratio etc., and improve motor manufacturing technology.
Yet, the location torque problem of concentrating winding permanent magnet motor that remains bigger than normal, preferably number of magnetic poles coordinates and can suppress location torque with the teeth groove number, thereby makes to concentrate the possibility of winding permanent magnet motor considerably less.Patent of invention ZL200780009121.0, propose a kind of large, medium and small tooth stator structure and suppress location torque; ZL200920204762.8 proposes preferably number of magnetic poles and coordinates to suppress location torque with the teeth groove number of large and small tooth; The essential piece structure that adopts of the stator punching of these class methods, after the piece coiling, then be assembled into stator body, or little tooth taken off to rear coiling, less tooth is assembled up.These methods all can't realize direct Full-automatic coiling, have increased the risk that process costs and fabrication error bring.
Concentrate the magneto of winding and the magneto ratio of traditional distributed winding, the teeth groove number of stator has at least lacked 3 times, be also, the groove number of concentrated winding permanent magnet motor is few and slot pitch is very large, can simplify motor manufacturing technology, but therefore also make and concentrate winding permanent magnet motor to lose to adopt an oblique slot pitch effectively to suppress possibility of location torque because the mechanical angle of the concentrated oblique slot pitch of winding permanent magnet motor and electrical degree all too is large.Therefore traditional distributed winding magneto suppresses the effective measures of location torque, and concentrated winding permanent magnet motor can not adopt, and concentrates a winding permanent magnet motor location torque large problem that remains bigger than normal.
Summary of the invention
In view of this, the invention provides a kind of segmentation skew notch and concentrate winding electric machine, generator and motor, it is mounted magnet steel between adopting, save material, utilized the numerical optimization in magnetic steel gap and notch gap to coordinate to improve the location torque frequency, suppressed the location torque amplitude, the air-gap field sine is good, the location torque of motor is less, and motor slot can fully meet the requirement of direct Full-automatic coiling, more is convenient to produce.
The invention provides a kind of segmentation skew notch and concentrate winding electric machine, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, the size of width of rebate Sc between two adjacent stators teeth of described concentrated winding electric machine and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3); The width τ m of described magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor; Described stator core is straight trough, and the axially certain mechanical angle of grading excursion symmetrically of described stator core is prolonged in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, the span K=(1 of k～10).
Concentrate winding electric machine according to segmentation skew notch of the present invention, described concentrated winding electric machine is inner rotor motor or external rotor electric machine.
Concentrate winding electric machine according to segmentation skew notch of the present invention, described stator core is divided into the N section, the notch position skew kT σ of every section stator core/N angle, and N section total drift angle is kT σ.
Concentrate winding electric machine according to segmentation skew notch of the present invention, described stator core is divided into three sections, the notch position skew kT σ of every section stator core/3 angles, and three sections total drift angles are kT σ.
Concentrate winding electric machine according to segmentation skew notch of the present invention, described stator core is divided into two sections, the notch position skew kT σ of every section stator core/2 angles, and two sections total drift angles are kT σ.
Concentrate winding electric machine according to segmentation skew notch of the present invention, motor pole number 2P=10, groove is counted Z=12, described stator core is divided into three sections, the notch position skew kT σ of every section stator core/3 angles, three sections total drift angles are kT σ, wherein T σ=360/(2P * Z/c)=360/(10 * 12/2)=6, k=1 got.
Concentrate winding electric machine according to segmentation skew notch of the present invention, motor pole number 2P=10, groove is counted Z=12, width of rebate Sc=3.5mm, the interval S m=3.2mm of two blocks of adjacent magnet steel, Sm/Sc=0.914.
Concentrate winding electric machine according to segmentation skew notch of the present invention, described stator core is repeatedly pressed and is formed by the multi-layer stator punching, described every section stator core is repeatedly pressed and is formed by the stator punching of same structure, described stator punching comprise ringwise stator yoke and with the integrated Z of a described stator yoke stator tooth, form Z groove between a described Z stator tooth.
Concentrate winding electric machine according to segmentation skew notch of the present invention, Z the piecemeal that structure is identical that each stator punching is divided into by the center of its stator yoke corresponding groove, have mutual interlock concaveconvex structure between adjacent two piecemeals.
Concentrate winding electric machine according to segmentation skew notch of the present invention, described piecemeal comprises the base portion that forms described stator yoke and the tooth section that forms stator tooth, described base portion one end is provided with at least one groove, and the described base portion other end is provided with at least one projection, interlock mutually between the groove of adjacent piecemeal and projection.
Concentrate winding electric machine according to segmentation skew notch of the present invention, described projection and described groove be shaped as circular arc or trapezoidal.
The present invention also provides a kind of generator, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, the size of width of rebate Sc between two adjacent stators teeth of described generator and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3); The width τ m of described magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor; Described stator core is straight trough, and the axially certain mechanical angle of grading excursion symmetrically of described stator core is prolonged in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, the span K=(1 of k～10).
The present invention also provides a kind of motor, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, the size of width of rebate Sc between two adjacent stators teeth of described motor and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3); The width τ m of described magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor; Described stator core is straight trough, and the axially certain mechanical angle of grading excursion symmetrically of described stator core is prolonged in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, the span K=(1 of k～10).
Segmentation skew notch of the present invention concentrates mounted magnet steel between the winding electric machine employing to save magnet steel, the size of width of rebate Sc between concentrated two teeth of winding electric machine stator and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3), different from the design concept of traditional magneto, traditional Design of PM Motor thinks that the less location torque of interval S m of width of rebate Sc and magnet steel is just less.The present invention is by strengthening and utilize the sudden change of two edge magnetic resistance of sudden change, the notch of two edge magnetic field intensitys of magnet steel spacing, under both interact, the frequency of location torque is doubled.In general, harmonic frequency doubles, and harmonic amplitude at least reduces one times, so the present invention improved the location torque frequency, can suppress the location torque amplitude.
It is given that the width of rebate Sc of motor of the present invention can artificially be designed institute, thereby motor slot can fully meet the requirement of direct Full-automatic coiling.The width τ m of magnet steel and the ratio of pole span τ, meet restriction relation: τ m/ τ >=(0.75～0.9), pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor, thereby can select the magnet steel consumption of motor, make to concentrate the magnetic field sine of winding electric machine optimised, can holding torque constant.
Stator core of the present invention is straight trough, and iron mandrel is prolonged to the certain mechanical angle of grading excursion symmetrically in the position of stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, and the span of k is K=(1～10).The k value is larger in general, by notch, is offset the impact of homogenizing notch more obvious, is also that the effect of homogenizing location torque is more obvious.Thereby can pass through the frequency multiplication location torque, then be offset notch, double with regard to the value that is equivalent to k.Make and concentrate the less effect that just can obtain desirable inhibition location torque of winding electric machine notch skew.
Simultaneously, the present invention adopts the stator core of straight trough skew notch form to be convenient to automatic winding, the notch grading excursion, and the structure of stator punching only needs several different forms to get final product, and more is convenient to produce, and reduces cost.Whereby, mounted magnet steel between the present invention adopts, saved material, utilize the numerical optimization in magnetic steel gap and notch gap to coordinate to improve the location torque frequency, suppress the location torque amplitude, the air-gap field sine is good, and the location torque of motor is less, motor slot can fully meet the requirement of direct Full-automatic coiling, is convenient to produce simultaneously.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, in below describing embodiment, the accompanying drawing of required use is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 segmentation skew notch of the present invention is concentrated the stator punching of a kind of embodiment of winding electric machine and the partial schematic diagram of rotor;
Fig. 2 is that in Fig. 1, the segmentation skew notch concentrates the notch of winding electric machine to be offset the local expansion schematic diagram of 0.25 stator slot distance;
Fig. 3 is the three-dimensional view that segmentation skew notch of the present invention is concentrated the stator of another embodiment of winding electric machine;
Fig. 4 is the three-dimensional view that segmentation skew notch of the present invention is concentrated the stator of the another embodiment of winding electric machine;
Fig. 5 is the front view of stator in Fig. 4; And
Fig. 6 is the stator punching schematic diagram of stator in Fig. 4.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of segmentation skew notch of the present invention is concentrated winding electric machine 100, and post spacing on its rotor yoke 10 2P piece N that is Sm, the magnet steel 20 that S polarity distributes alternately is also that motor has 2P magnetic pole, and stator core 30 is provided with Z groove 31 and Z stator tooth 32.From traditional theory analysis and experiment, the cycle of the location torque of the magneto that this number of poles and groove number coordinate is: T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z.This segmentation skew notch concentrates winding electric machine 100 to can be used as high-performance servomotor, torque motor, motor in electric automobile and direct wind-driven generator, and this segmentation skew notch concentrates winding electric machine 100 to can be inner rotor motor or external rotor electric machine simultaneously.
Wherein, the size of the width of rebate Sc between two adjacent stators teeth 32 of the concentrated winding electric machine 100 of segmentation skew notch and the interval S m of two blocks of adjacent magnet steel 20, meet restriction relation: Sm/Sc=(0.83～1.3).This design concept from traditional magneto is different, and traditional Design of PM Motor thinks that the less location torque of the interval S m of width of rebate Sc and magnet steel is just less.The present invention is by strengthening and utilize the sudden change of two edge magnetic resistance of sudden change, the notch of two edge magnetic field intensitys of magnet steel spacing, under both interact, the frequency of location torque is doubled.In general, harmonic frequency doubles, and harmonic amplitude at least reduces one times.Therefore the present invention has improved the location torque frequency, can suppress the location torque amplitude.It is given that the width of rebate Sc of while motor can artificially be designed institute, thereby motor slot can fully meet the requirement of direct Full-automatic coiling.
The width τ m of magnet steel 20 and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor.Thereby can select the magnet steel consumption of motor, simultaneously, make to concentrate the magnetic field sine of winding electric machine optimised, can holding torque constant.Whereby, by the concentrated winding electric machine of above-mentioned two constraintss design, the air-gap field sine is good, and the location torque of motor is smaller.
As shown in Figures 2 and 3, stator core 30 is straight trough, and iron mandrel is prolonged to the certain mechanical angle of grading excursion symmetrically in the position of stator core 30 notches, the total drift angle is kT σ, T σ=360/(2P * Z/c wherein), c is the greatest common divisor of 2P * Z, and the span of k is K=(1～10).The k value is larger in general, by notch, is offset the impact of homogenizing notch more obvious, is also that the effect of homogenizing location torque is more obvious.Thereby can pass through the frequency multiplication location torque, then be offset notch, double with regard to the value that is equivalent to k.Make and concentrate the less effect that just can obtain desirable inhibition location torque of winding electric machine notch skew.As shown in Figure 2, when the present invention gets K=1, actual notch side-play amount D is at 0.25 stator slot apart from left and right, and the effect that suppresses location torque is very obvious.And tradition is concentrated winding electric machine skewed slot 0.25 slot pitch, the effect that suppresses location torque is just very limited, and skewed slot 1.0 slot pitches are unfeasible.
Simultaneously, adopt the stator core 30 of straight trough skew notch form to be convenient to automatic winding, the notch grading excursion, the structure of stator punching only needs several different forms to get final product, and more is convenient to produce, and reduces cost.Whereby, mounted magnet steel between the present invention adopts, saved material, utilize the numerical optimization in magnetic steel gap and notch gap to coordinate to improve the location torque frequency, suppress the location torque amplitude, the air-gap field sine is good, and the location torque of motor is less, motor slot can fully meet the requirement of direct Full-automatic coiling, is convenient to produce simultaneously.
Concrete, stator core 30 is divided into the N section, the notch position constant offset kT σ of every section/N angle, and N section total drift angle is kT σ.For example: stator core 30 can be divided into to three sections, the notch position skew kT σ of every section/3 angles, three sections total drift angles are kT σ, as shown in Figure 2 to 4; Perhaps stator core 20 is divided into two sections, the notch position skew kT σ of every section/2 angles, and two sections total drift angles are kT σ.
As shown in Figure 1, concentrate on the rotor yoke 10 of winding type motor 100 and post the magnet steel 20 that 10 N, S polarity distribute alternately, stator core 30 is provided with 12 grooves and 12 stator tooths.As shown in Figure 2, stator core 30 is divided into three sections, the notch position skew kT σ of every section/3 angles, three sections total drift angles are kT σ, T σ=360/(2P * Z/c)=360/(10 * 12/2)=6, get k=1, notch side-play amount D is 6 degree.Wherein, Sc represents width of rebate, and D represents the notch side-play amount, and U represents the facewidth, and V represents the tooth pitch of adjacent teeth.Preferably, width of rebate Sc=3.5mm, the interval S m=3.2mm of two blocks of adjacent magnet steel 20, Sm/Sc=0.914.
With reference to Fig. 3 and Fig. 4, it has illustrated the embodiment of 30 two kinds of different structures of stator core.In Fig. 3, stator core 30 is repeatedly pressed and is formed by multi-layer stator punching 33, and stator core 30 is divided into three sections, every section stator core is repeatedly pressed and is formed by the stator punching 33 of same structure, stator punching 33 comprise ringwise stator yoke 331 and with the integrated Z of stator yoke 331 stator tooth 32, form Z groove 31 between Z stator tooth 32.Every section stator core is repeatedly pressed and is formed by the stator punching 33 of same structure, with respect to the straight trough skew notch structure that does not adopt segmentation, can reduce the number of stator punching mold, reaches the identical effect that reduces location torque, more is convenient to produce.
In the embodiment shown in fig. 4, from different in Fig. 3, the identical piecemeal 34 of Z structure that each stator punching 33 is divided into by the center of its stator yoke 331 corresponding grooves 31 is spliced, and between adjacent two piecemeals 34, has mutual interlock concaveconvex structure.Each stator punching 33 is spliced by Z the identical piecemeal 34 of structure, and punching press forms the waste material that piecemeal 34 produces, and with respect to direct punching press, forms waste material that whole stator punching 33 produces still less, provides cost savings.
Fig. 5 is the front view of stator core 30 in Fig. 4; Fig. 6 is the concrete structure schematic diagram of the piecemeal of stator punching 33 in Fig. 4.From Fig. 5, Fig. 6, can find out, piecemeal 34 comprises the base portion 341 that forms stator yoke 331 and the tooth section 342 that forms stator tooth 32, base portion 341 1 ends are provided with at least one groove 3411, base portion 341 other ends are provided with at least one projection 3412, interlock mutually between the groove 3411 of adjacent piecemeal 34 and projection 3412.Preferably, projection 3412 and groove 3411 be shaped as circular arc or trapezoidal, can certainly be other shapes.
The present invention also provides a kind of generator, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, the size of width of rebate Sc between two adjacent stators teeth of this generator and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3); The width τ m of magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor; This stator core is straight trough, and iron mandrel is prolonged to the certain mechanical angle of grading excursion symmetrically in the position of this stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, and the span of k is K=(1～10).
The present invention also provides a kind of motor, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, the size of width of rebate Sc between two adjacent stators teeth of this motor and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3); The width τ m of magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor; Described stator core is straight trough, and iron mandrel is prolonged to the certain mechanical angle of grading excursion symmetrically in the position of this stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, and the span of k is K=(1～10).
In sum, between concentrated winding electric machine of the present invention adopts, mounted magnet steel is saved magnet steel, the size of width of rebate Sc between concentrated two teeth of winding electric machine stator and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3), different from the design concept of traditional magneto, traditional Design of PM Motor thinks that the less location torque of interval S m of width of rebate Sc and magnet steel is just less.The present invention is by strengthening and utilize the sudden change of two edge magnetic resistance of sudden change, the notch of two edge magnetic field intensitys of magnet steel spacing, under both interact, the frequency of location torque is doubled.In general, harmonic frequency doubles, and harmonic amplitude at least reduces one times, so the present invention improved the location torque frequency, can suppress the location torque amplitude.It is given that the width of rebate Sc of while motor can artificially be designed institute, thereby motor slot can fully meet the requirement of direct Full-automatic coiling.The width τ m of magnet steel and the ratio of pole span τ, meet restriction relation: τ m/ τ >=(0.75～0.9), pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor, thereby can select the magnet steel consumption of motor, make to concentrate the magnetic field sine of winding electric machine optimised, can holding torque constant.Stator core is straight trough, and iron mandrel is prolonged to the certain mechanical angle of grading excursion symmetrically in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, and the span of k is K=(1～10).The k value is larger in general, by notch, is offset the impact of homogenizing notch more obvious, is also that the effect of homogenizing location torque is more obvious.Thereby can pass through the frequency multiplication location torque, then be offset notch, double with regard to the value that is equivalent to k.Make and concentrate the less effect that just can obtain desirable inhibition location torque of winding electric machine notch skew.Simultaneously, adopt the stator core of straight trough skew notch form to be convenient to automatic winding, the notch grading excursion, the structure of stator punching only needs several different forms to get final product, and more is convenient to produce, and reduces cost.Whereby, mounted magnet steel between the present invention adopts, saved material, utilize the numerical optimization in magnetic steel gap and notch gap to coordinate to improve the location torque frequency, suppress the location torque amplitude, the air-gap field sine is good, and the location torque of motor is less, motor slot can fully meet the requirement of direct Full-automatic coiling, is convenient to produce simultaneously.
Applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention simultaneously.
Claims (13)
1. a segmentation skew notch is concentrated winding electric machine, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, and stator core is provided with Z groove and Z stator tooth, it is characterized in that,
The size of width of rebate Sc between two adjacent stators teeth of described concentrated winding electric machine and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3);
The width τ m of described magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor;
Described stator core is straight trough, and the axially certain mechanical angle of grading excursion symmetrically of described stator core is prolonged in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, the span K=(1 of k～10).
2. segmentation skew notch according to claim 1 is concentrated winding electric machine, it is characterized in that, described concentrated winding electric machine is inner rotor motor or external rotor electric machine.
3. segmentation skew notch according to claim 1 is concentrated winding electric machine, it is characterized in that, described stator core is divided into the N section, the notch position skew kT σ of every section stator core/N angle, and N section total drift angle is kT σ.
4. segmentation skew notch according to claim 3 is concentrated winding electric machine, it is characterized in that, described stator core is divided into three sections, the notch position skew kT σ of every section stator core/3 angles, and three sections total drift angles are kT σ.
5. segmentation skew notch according to claim 3 is concentrated winding electric machine, it is characterized in that, described stator core is divided into two sections, the notch position skew kT σ of every section stator core/2 angles, and two sections total drift angles are kT σ.
6. segmentation skew notch according to claim 4 is concentrated winding electric machine, it is characterized in that, motor pole number 2P=10, groove is counted Z=12, described stator core is divided into three sections, the notch position skew kT σ of every section stator core/3 angles, and three sections total drift angles are kT σ, T σ=360/(2P * Z/c wherein)=360/(10 * 12/2)=6, get k=1.
7. segmentation skew notch according to claim 1 is concentrated winding electric machine, it is characterized in that, and motor pole number 2P=10, groove is counted Z=12, width of rebate Sc=3.5mm, the interval S m=3.2mm of two blocks of adjacent magnet steel, Sm/Sc=0.914.
8. segmentation skew notch according to claim 3 is concentrated winding electric machine, it is characterized in that, described stator core is repeatedly pressed and is formed by the multi-layer stator punching, described every section stator core is repeatedly pressed and is formed by the stator punching of same structure, described stator punching comprise ringwise stator yoke and with the integrated Z of a described stator yoke stator tooth, form Z groove between a described Z stator tooth.
9. segmentation skew notch according to claim 8 is concentrated winding electric machine, it is characterized in that, Z the piecemeal that structure is identical that each stator punching is divided into by the center of its stator yoke corresponding groove, have mutual interlock concaveconvex structure between adjacent two piecemeals.
10. segmentation skew notch according to claim 9 is concentrated winding electric machine, it is characterized in that, described piecemeal comprises the base portion that forms described stator yoke and the tooth section that forms stator tooth, described base portion one end is provided with at least one groove, the described base portion other end is provided with at least one projection, interlock mutually between the groove of adjacent piecemeal and projection.
11. segmentation skew notch according to claim 10 is concentrated winding electric machine, it is characterized in that, described projection and described groove be shaped as circular arc or trapezoidal.
12. a generator, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, it is characterized in that,
The size of width of rebate Sc between two adjacent stators teeth of described generator and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3);
The width τ m of described magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor;
Described stator core is straight trough, and the axially certain mechanical angle of grading excursion symmetrically of described stator core is prolonged in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, the span K=(1 of k～10).
13. a motor, post spacing on its rotor yoke 2P piece N that is Sm, the magnet steel that S polarity distributes alternately, stator core is provided with Z groove and Z stator tooth, it is characterized in that,
The size of width of rebate Sc between two adjacent stators teeth of described motor and the interval S m of two blocks of adjacent magnet steel, meet restriction relation: Sm/Sc=(0.83～1.3);
The width τ m of described magnet steel and the ratio of pole span τ meet restriction relation: τ m/ τ >=(0.75～0.9), and pole span τ=360 °/2P wherein, P is the magnetic pole logarithm of motor;
Described stator core is straight trough, and the axially certain mechanical angle of grading excursion symmetrically of described stator core is prolonged in the position of described stator core notch, and the total drift angle is kT σ, wherein T σ=360/(2P * Z/c), c is the greatest common divisor of 2P * Z, the span K=(1 of k～10).
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| CN105553131A (en) * | 2015-12-23 | 2016-05-04 | 湘潭电机股份有限公司 | Taper groove iron core of segmental punching motor and fabrication method of taper slot iron core |
| CN108039781A (en) * | 2017-10-17 | 2018-05-15 | 邹庆 | Novel motor stator and winding mounting process |
| CN108429418A (en) * | 2018-05-16 | 2018-08-21 | 珠海英搏尔电气股份有限公司 | Motor stator, motor, linear motor stator electric and linear motor |
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| CN114069909A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
| CN114069908A (en) * | 2021-12-08 | 2022-02-18 | 安徽美芝精密制造有限公司 | Stator, motor, compressor and electrical equipment |
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