CN209001687U - Stator punching - Google Patents

Abstract

The utility model discloses a kind of stator punchings, unit piece including several sectors, the unit piece of several sectors surrounds and forms ring structure, each unit piece includes stator yoke, stator tooth and stator slot, the outer end of the stator tooth and the inside of stator yoke connect, and the inner surface of stator tooth is recessed with several grooves, the stator yoke surface insulation is wound with coil, alternate in the rotor punching to be equipped with several lock chambers for fixed magnet.Its advantages are that magnetic slot torque is lower, the reachable ± 2mN.m of theoretical value；Rated point output torque undulating value is lower, and reachable ± 3%；Magnetic bridge is set in rotor, loss of excitation will not occur for magnet, and reliability is fully ensured that.

Description

Stator punching

Technical field

The utility model relates to EPS brushless motor technical field, especially a kind of stator punching.

Background technique

The three mating Honda vehicles of the product of leaf motor 2010, stator punching skewed slot, the straight pole of stator punching are magnetized, and 9 slot, 6 pole opens 2 A auxiliary tank, the program can solve cogging torque and Ripple problem bigger than normal, but because of flume structure, motor copper consumption be caused to increase Add, copper factor decline and magnet dosage is bigger than normal and difficulty of processing is larger, this is solution under the premise of sacrificing performance.Ah The mating Toyota sedan of product in 2010, the program not can solve cogging torque and Ripple problem bigger than normal for this, but magnetize difficulty compared with Greatly, magnet dosage is more, exposed because of magnet, Yi Fasheng loss of excitation, this is a solution for sacrificing cost and reliability.

The major defect of the prior art is that at high cost, difficulty of processing is big, reliability not can guarantee, this is for automotive safety part For be fatal.

Utility model content

The purpose of this utility model is to solve the deficiencies in the prior art, provides a kind of stator punching.

A kind of technical solution of the utility model:

A kind of stator punching, the unit piece including several sectors, the unit piece of several sectors is around ring structure is formed, often One unit piece includes stator yoke, stator tooth and stator slot, and the outer end of the stator tooth and the inside of stator yoke connect, stator tooth Inner surface is recessed with several grooves, and the stator yoke surface insulation is wound with coil, in the rotor punching it is alternate be equipped with it is several Lock chamber for fixed magnet.

A kind of preferred embodiment is that there are the first gaps between the inner end of the adjacent stators tooth.

A kind of preferred embodiment is that the groove of the inner surface of the stator tooth is 1~6.

In summary technical solution, the utility model has the beneficial effects that cogging torque is lower, the reachable ± 2mN.m of theoretical value； Rated point output torque Ripple value is lower, and reachable ± 3%；Ndfeb magnet dosage is less, energy saving to meet national green Environmental requirement；Because magnet is laminated structure, processing is more simple, is more suitable for producing in enormous quantities；Stator punching setting is several recessed Slot further decreases cogging torque and output torque Ripple value, while also can be reduced stator punching weight.

The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model Art means, and being implemented in accordance with the contents of the specification, and in order to allow the above and other purpose, feature of the utility model It can be more clearly understood with advantage, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the utility model；

Fig. 2 is the partial enlarged view of C in Fig. 1；

Fig. 3 is the perspective view of unit piece in the utility model；

Fig. 4 is cross-sectional view when the utility model is used in combination with rotor punching；

Fig. 5 is the partial enlarged view of A in Fig. 4；

Fig. 6 is the partial enlarged view of B in Fig. 4；

Fig. 7 is the perspective view of rotor punching；

Fig. 8 is the top view of rotor punching；

Fig. 9 be when the utility model is used in combination with rotor punching cogging torque with the variation of time variation diagram；

When Figure 10 is that the peripheral wall of rotor punching is not set raised, cogging torque variation diagram with the variation of time；

When Figure 11 is that the inner face of stator tooth is not provided with groove, cogging torque variation diagram with the variation of time；

Figure 12 is inner face when being not provided with groove of the not set protrusion of the peripheral wall of rotor punching, stator tooth, cogging torque with The variation of time and variation diagram；

Figure 13 be when the utility model is used in combination with rotor punching output torque with the variation of time variation diagram；

When Figure 14 is that the peripheral wall of rotor punching is not set raised, output torque variation diagram with the variation of time；

When Figure 15 is that the inner face of stator tooth is not provided with groove, output torque variation diagram with the variation of time；

Figure 16 is inner face when being not provided with groove of the not set protrusion of the peripheral wall of rotor punching, stator tooth, output torque with The variation of time and variation diagram.

Specific embodiment

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The utility model is described further with reference to the accompanying drawing.

As shown in Figure 1 to Figure 3, a kind of stator punching 10, the unit piece 11 including several sectors, the unit piece of several sectors 11 around ring structure is formed, and each unit piece 11 includes stator yoke 111, stator tooth 112 and stator slot 113, stator tooth 112 Outer end is connect with the inside of stator yoke 111, and the inner surface of stator tooth 112 is recessed with several grooves 114, and 111 surface of stator yoke is exhausted Edge is wound with coil, and coil can generate magnetic field, and the outer end of stator tooth 112 is fixed among the inside of stator yoke 111.

Specifically, as shown in Figures 1 to 8, there are the first gap 115, the first gaps 115 for the inner end of adjacent stators tooth 112 Width be d4, the magnetic conductivity in the first gap 115 is the magnetic conductivity of air, and the magnetic conductivity in the first gap 115 is less than stator tooth 112 Magnetic conductivity, the coil of the outer winding of adjacent stators tooth 112 generates magnetic induction line respectively, since the magnetic conductivity in the first gap 115 compares It is small, therefore the magnetic induction line influence that adjacent windings generation is is smaller.

As shown in Figures 1 to 8, the groove 114 of the inner face of stator tooth 112 is 1~6, and the utility model further groove 114 is 4.

As shown in Figures 1 to 8, the utility model combination rotor punching 20 uses, and stator punching 10 is arranged in rotor punching 20 outsides, rotor punching 20 are set on arbor, and rotor punching 20 is fixedly connected with arbor, and arbor drives rotor punching 20 opposite Stator punching 10 rotates.In rotor punching 20 it is alternate be equipped with several lock chambers 21 for fixed magnet, lock chamber 21 along turn Sub- punching 20 is arranged radially, and magnet is fixed in lock chamber 21, and magnet is ndfeb magnet, and one magnetic pole of magnet is rushed close to rotor The center of piece 20, center of another magnetic pole far from rotor punching 20, the peripheral wall of rotor punching 20 is alternate to be equipped with several raised 22, turns Sub- punching 20 is an integral structure with protrusion 22, and 20 part of rotor punching between two lock chambers 21 and protrusion 22 form a sector Structure, adjacent two protrusion 22 is symmetrical about lock chamber 21, there are air gap 116 between protrusion 22 and the inside of stator punching 10, 116 spacing of air gap between 10 inside of top and stator punching of protrusion 22 is minimum, in the edge and stator punching 10 of protrusion 22 Air gap 116 spacing between side is maximum, and therefore, the surface of protrusion 22 is arc or curved shape, protrusion 22 in stator punching 10 First become smaller between side there are the spacing of air gap 116 and become larger afterwards, and without mutation.

As shown in Figures 1 to 8, several magnetic bridges 23 are equipped in rotor punching 20, magnetic bridge 23 is close to rotor punching 20 Inside, the adjacent lock chamber 21 in rotor punching 20 are symmetrical arranged about magnetic bridge 23.The magnetic conductivity of magnetic bridge 23 is air Magnetic conductivity, the magnetic conductivity of magnetic bridge 23 are less than the magnetic conductivity of rotor punching 20, and the magnet in adjacent lock chamber 21 generates magnetic respectively Feel line, since the magnetic conductivity of magnetic bridge 23 is less than the magnetic conductivity of rotor punching 20, the magnetic conductivity of magnetic bridge 23 is smaller, adjacent solid The magnet generation magnetic induction line determined in chamber 21 only least partially penetrates magnetic bridge 23, and most of to pass through rotor punching 20, magnet generates Magnetic strength thread path is successively from the pole N of magnet to rotor punching 20, air gap 116, stator tooth 20, rotor punching 20, most Zhongdao magnet The pole S, formed closed magnetic circuit.

As shown in Figures 1 to 8, there are the second gaps 24 between adjacent protrusion 22, and the width in the second gap 24 is d1, fixed It is 0.1mm~1mm that the width of chamber 21, which is the difference that the ratio of d2, d1 and d2 are 0.8~1 or d2 and d1, the outer end of lock chamber 21 with There are spacing for the outer end of rotor punching 20.

As shown in Figures 1 to 8, the width of groove 114 is d3, and 114 groove depth of groove is h3, the width in the first gap 115 Width is that the ratio that the ratio of d4, d3 and d4 are 0.6~1.2, h3 and d4 is 0.6~1.2.The d8 is 0.3mm~0.7mm；Or D1 is less than or equal to d6.

As shown in Figures 1 to 8, the inner face of stator tooth 112 between the outer wall of rotor punching 20 at a distance from be d5, stator tooth 112 inner face with protrusion 22 highest point between at a distance from be d6, d5 more than or equal to 2 times of d6, d6 and d4 ratio be 0.8~1.2.

As shown in Figures 1 to 8, lock chamber 21 and 20 outer surface distance d8 of rotor punching, d8 are 0.3mm~0.7mm；Or D8 is less than or equal to d6.D7 is divided between lock chamber 21 and magnetic bridge 23, d7 is 0.3mm~0.7mm；Or d7 is less than or equal to d6。

In Fig. 9, abscissa is the time, and ordinate is cogging torque, when d1 be 2.4mm, d2 3.1mm, d6 0.5mm, D5 is 1.2mm, and h3 0.5mm, d3 0.6mm, when d4 is 0.5mm, cogging torque changes with the variation of time.

In Figure 10, abscissa is the time, and ordinate is cogging torque, and cogging torque is indicated with Cogging, works as rotor punching 20 peripheral wall not set raised 22, d1 2.4mm, d2 3.1mm, h3 0.5mm, d3 0.6mm, when d4 is 0.5mm, tooth socket Torque changes with the variation of time.

In Figure 11, abscissa is the time, and ordinate is cogging torque, and cogging torque is indicated with Cogging, stator tooth 112 Interior not set groove 114, when d2 3.1mm, d4 are 0.5mm, cogging torque changes with the variation of time.

In Figure 12, abscissa is the time, and ordinate is cogging torque, and cogging torque is indicated with Cogging, works as rotor punching 20 peripheral wall not set raised 22, the interior not set groove 114 of stator tooth 112, d2 3.1mm, when d4 is 0.5mm, tooth socket turns Square changes with the variation of time.

In Figure 13, abscissa is the time, and ordinate is output torque, and output torque fluctuation is indicated with Ripple, when d1 is 2.4mm, d2 3.1mm, d6 0.5mm, d5 1.2mm, h3 0.5mm, d3 0.6mm, when d4 is 0.5mm, output torque Change with the variation of time.

In Figure 14, abscissa is the time, and ordinate is output torque, and output torque fluctuation is indicated with Ripple, when d1 is When 2.4mm, d2 3.1mm, d6 0.5mm, d5 1.2mm, h3 0mm, d3 0mm, d4 are 0.5mm, output torque with The variation of time and change.

In Figure 15, abscissa is the time, and ordinate is output torque, and output torque fluctuation is indicated with Ripple, works as rotor The peripheral wall of punching 20 not set raised 22, d1 2.4mm, d2 3.1mm, h3 0.5mm, d3 0.6mm, when d4 is 0.5mm, Output torque changes with the variation of time.

In Figure 16, abscissa is the time, and ordinate is output torque, and output torque fluctuation is indicated with Ripple, works as rotor The peripheral wall of punching 20 not set raised 22, the interior not set groove 114 of stator tooth 112 are defeated when d2 3.1mm, d4 are 0.5mm Torque changes with the variation of time out.

It is specific embodiment of the present utility model above, it is noted that for those skilled in the art For, without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications It is considered as the protection scope of the utility model.

Claims (3)

1. a kind of stator punching, which is characterized in that the unit piece including several sectors, the unit piece of several sectors, which surrounds, forms ring Shape structure, each unit piece include stator yoke, rotor punching, stator tooth and stator slot, the outer end of the stator tooth and stator yoke Inside connection, the inner surface of stator tooth is recessed with several grooves, and the stator yoke surface insulation is wound with coil, the rotor It is alternate in punching to be equipped with several lock chambers for fixed magnet.

2. stator punching according to claim 1, which is characterized in that there are first between the inner end of the adjacent stator tooth Gap.

3. stator punching according to claim 1, which is characterized in that the groove of the inner surface of the stator tooth is 1~6 It is a.