KR20230065632A - Skewed Tooth Separation type Motor - Google Patents

Abstract

The skew tooth separate motor 1 of the present invention has a stator skewed tooth tip 13 or a skewed tooth tip 33 manufactured separately from the stator 10 or rotor 20 By being located between the stator 10 and the rotor 20, it is possible to manufacture a stator skew tooth tip to which only the tooth tip is applied with a skew mold in the stator skew manufacturing process. -tooth) and the skewed tooth tip of the stator with a skew stacked structure. When assembling the stator of the motor, the manufacturing process difficulties of the existing skew type stator and the power density increase winding difficulty of the step skew type rotor are all solved. features that can be implemented.

Description

Skewed Tooth Separation type Motor}

The present invention relates to a skew-type motor, and more particularly, to a skew-tooth detachable motor capable of reducing variation in magnetic resistance according to rotation by using a stator skew-tooth tip in which only the tooth end of a stator and a rotor is skewed.

In general, an electric motorcycle driving motor is a motor composed of a stator and a rotor.

In particular, among the motors, a skew type motor is composed of a skewed type stator or a skewed type rotor to be advantageous in improving cogging torque and torque ripple, which are main output qualities. In this case, the skew structure reduces the torque ripple and the cogging torque phenomenon in which torque is uneven due to non-uniform magnetic flux density in the air gap due to the influence of slots for coil winding such as slots, auxiliary slots, and auxiliary salient poles, thereby reducing the deviation of magnetic resistance during motor rotation. works to make it smaller.

As an example, the skewed type stator includes a stator core, and the stator core is inclined with a plurality of skewed teeth, so that an integrated bobbin is implemented by insert molding on the outer surface of the plurality of teeth , By winding a coil on the outer circumferential surface of the integrated bobbin, it is manufactured as an external motor.

Therefore, the skewed type stator functions so that the abducted motor is advantageous in terms of noise and vibration by configuring the abducted motor as a stator manufactured as a skew type.

On the other hand, the skewed type rotor manufactures a rotor core with a step skew and assembles it with a T-segment stator core. In particular, the T-segment stator core is a rotational stacking method in which a plurality of parts are formed in a circular shape. By assembling, it is advantageous to reduce the variation of magnetic resistance.

Therefore, the skewed type rotor is advantageous in improving cogging torque and torque ripple, which are the main output qualities of the motor, by reducing the magnetic resistance deviation in a rotational stack method.

Japanese Patent Publication JP2015-208153A (2015.11.19)

However, the skewed type stator and the skewed type rotor have several problems as follows.

For example, the skewed type stator has a manufacturing process difficulty because a plurality of inclined skew teeth must be integrally manufactured with the stator core.

In particular, the skewed type rotor is less effective than linear skew by applying step skewed because it is difficult to implement the skew of the rotor as a linear skew due to the manufacturability of the magnet, and the T-segment stator core The stator spin-lamination method has difficulty in increasing the winding area ratio to increase the power density while being disadvantageous in the winding process.

Therefore, in view of the above points, the present invention can manufacture a stator skew tooth tip to which only the tooth tip is applied with a skew mold in the stator skew manufacturing process. With a structure that separates the skewed tooth tip, when assembling the stator of the motor, it is possible to solve both the manufacturing process difficulties of the existing skew type stator and the power density increase winding difficulty of the step skew type rotor. has a purpose

In order to achieve the above object, the skew-type motor of the present invention includes a stator skew-tooth tip or a skew-tooth tip between a stator and a rotor, and the stator skew-tooth tip or the skew-tooth tip is separate from the stator or the rotor It is characterized in that it is made of.

In a preferred embodiment, the stator skew tooth tip is located between the inner diameter of the stator and the outer diameter of the rotor in the inner space of the stator.

In a preferred embodiment, the stator skew tooth tip has skew teeth inclined at a skew angle, the skew teeth form a radial arrangement structure with a predetermined tooth radial angle, and the skew teeth make the radial arrangement structure adjacent to each other Connects the skew tooth to the slot open.

As a preferred embodiment, the stator skew toe tips are composed of a plurality to form a stacked structure.

In a preferred embodiment, the skew tooth is fixed to the yoke tooth of the stator and an assembly part, the assembly part is coupled with a concave groove and an iron protrusion, and the concave groove is a groove in the yoke tooth structure, and the iron protrusion protrudes from the skewer tooth in a rib structure.

As a preferred embodiment, the stator has a segment-integrated structure, and the rotor has a straight structure.

As a preferred embodiment, the skew tooth tip is located between the outer diameter of the stator and the inner diameter of the rotor in the outer space of the stator, and the skew tooth tip is an abducted stator yoke having a skew tooth tip inclined at a skew angle structure, and the skew-tooth tips form a radially arranged structure.

In a preferred embodiment, the skew tooth tip forms the radial arrangement structure at a predetermined tooth radial angle applied to the yoke tooth of the stator, the skew tooth tip is fixed to the yoke tooth and an assembly part, and the assembly part is fixed to the yoke tooth. It is combined with a concave groove dug into the tooth in a groove structure and an iron protrusion protruding in a rib structure from the skew tooth tip.

The skew tooth detachable motor of the present invention implements the following actions and effects.

First, since only the tooth tip of the stator and the rotor is skewed and manufactured as a skew motor, it is very easy to manufacture with a skew mold. Second, since the skew motor applies a linear skew, the cogging reduction effect is greater than that of the existing step skew, and the stator cylindricity can be improved by applying the stator as a tong core. Third, since the skew structure is applied only to the stator skew-tooth tip of the stator and the rotor, the manufacturing cost is reduced by simplifying the rotor manufacturing, and the number of magnets (ie, the assembly quantity) and the assembly process can be reduced with the non-skew rotor. Fourth, since the stator core can be applied as a straight core, there is an advantage in that an array process required in the existing split core is unnecessary and a welding process for coupling between cores is unnecessary. Fifth, a core laminated structure in which slot openings are connected at regular intervals for the integration of tooth tip laminates, and a position fixing structure by the uneven shape of the yoke-tooth and tooth tip. Output when assembling the stator of the motor In order to increase the density, it is easy to increase the winding area ratio.

1 is a detailed configuration diagram of a rotor and a stator of a separate skew-tooth motor according to the present invention, FIG. 2 is a detailed configuration example of a stator yoke and a stator skew-tooth tip constituting a stator according to the present invention, and FIG. 3 is an example of the present invention An example in which the skew tooth separation type motor according to is configured as an abducted motor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying exemplary drawings, and since these embodiments can be implemented in various different forms by those skilled in the art as an example, the description herein It is not limited to the embodiment of

1 and 2 show the configuration of the skew type motor 1.

Referring to FIG. 1 , a motor 1 includes a shaft 3, a stator 10 and a rotor 20.

For example, the stator 10 is composed of a stator yoke 11 and a stator skewed tooth tip 13, and the stator yoke 11 is a segment formed with an inner space ) It is composed of an integral structure to radially form a yoke-tooth 12, and the stator skew tooth tip 13 is located in the inner space of the stator yoke 11 so as to surround the outer diameter of the rotor 20 .

In particular, the yoke teeth 12 form a radial arrangement structure with a tooth radial angle K with respect to the axial center O of the stator yoke 11. The stator skew tooth tip 13 has skewed teeth 14 located on each of the yoke teeth 12, and each of the skew teeth 14 is inclined at a predetermined skew angle (X ) to form In this case, the skew angle X of the skew tooth 14 acts to favor the stator 10 against noise and vibration like the skew angle applied to the existing structure.

For example, the rotor 20 is configured in a straight shape without skew, and is composed of a cylindrical rotor core in which an axis hole through which the shaft 3 passes is drilled to form an axis center O-O, and a permanent magnet is formed in the cylindrical rotor core. inserted (embedded). In this case, the non-skew-applied straight rotor 20 has an advantage of not applying a rotor-applied skew, which is difficult to implement a linear skew due to the existing magnet manufacturability, or a step skew less effective than the conventional linear skew.

Therefore, the motor 1 is a skew-type motor 1 applied with a stator skew-tooth tip 13, and an interior permanent magnet motor in which a permanent magnet is inserted (embedded) in the rotor 20, which is advantageous for securing reluctance torque. Magnet Motor) and only the stator skew tooth tip (13) is manufactured with a skew mold applied only to the tooth tip when manufacturing the stator skew, so it has the advantage of securing easy winding and manufacturing.

Referring to FIG. 2 , the stator 10 has a stacked structure of a stator yoke 11 and a stator skew tooth tip 13.

In particular, the stator skew tooth tip 13 is formed of a plurality of stator skew tooth tip stacked structures composed of the first to n stator skew tooth tips 13a, ..., 13n, and the first to n stator skew tooth tips Each of (13a, ..., 13n) consists of a skew tooth (14) and a slot open (15).

For example, the skew tooth 14 is located at each of a plurality of yoke teeth 12 arranged radially on the stator yoke 11, and the slot open 15 is located between the plurality of radially arranged yoke teeth 12. It is located in the gap formed.

In addition, the stator 10 has an assembly part 18 between the stator yoke 11 and the stator skew tooth tip 13, and the assembly part 18 has a concave groove 18a and an iron It consists of a projection (18b).

For example, the yaw groove 18a is dug into a groove structure in each of the plurality of yoke teeth 12 of the stator yoke 11, and the iron protrusion 18b is of the stator skew tooth tip 13 Each of the plurality of skew teeth 14 protrudes in a rib structure. In this case, the concave groove 18a and the convex projection 18b are each formed in a vertical straight line, and in particular, the convex projection 18b is formed in a concave groove 18a and They protrude from the outer surface of the stator skew tooth tip 13 so as to face each other.

Therefore, the assembly of the stator yoke 11 and the stator skew tooth tip 13 is performed by aligning the yaw groove 18a and the convex protrusion 18b with each other, and then the stator skew tooth tip 13 By pushing from the top to the bottom or from the bottom to the top, it is fixed with the stator yoke 11 and the assembled state is maintained.

Meanwhile, FIG. 3 shows an example in which the motor 1 is configured as an abducted motor 1. In this case, the external motor 1 is a rotor 20 to which the shaft 3 is coupled as shown in FIG.

As shown, the abducted motor 1 is composed of an abducted stator 30 . In this case, in the abduction motor 1, the shaft 3 of FIG. 1 is coupled to the shaft hole of the abduction stator 30, and the rotor 20 of FIG. 1 moves the abduction stator 30 into its internal space. It is made to cover

Specifically, the abduction stator 30 includes an abduction stator yoke 31, a yoke tooth 32, a skew tooth tip 33, and an assembly part 38.

For example, the abduction stator yoke 31 is made of a segment-integrated structure in which the inside is formed as an internal space, and the yoke tooth 32 has a tooth radiation angle with respect to the axis center of the abduction stator yoke 31 (K) (see Figs. 1 and 2) to form a radial arrangement structure.

For example, the skew tooth tip 33 is located on each of a plurality of radially arranged yoke teeth 32 and is integrally formed with the yoke tooth 32, and each of the skew tooth tips 33 has a predetermined skew angle form (X).

Therefore, the outer diameter of the abducted stator yoke 31 is formed with the skew toe tip 33 of the skew angle X, thereby realizing the same effect of improving cogging torque and torque ripple as that of the conventional skewed type stator.

However, the abducted stator yoke 31 has a cylindrical structure without a laminated structure by separately manufacturing the yoke tooth 32 and the skew tooth tip 33, thereby combining the yoke tooth 32 and the skew tooth tip 33 Unlike the existing structure, there is a difference in that the assembly unit 38 is applied.

To this end, the assembling part 38 is composed of a concave groove 38a and an iron protrusion 38b.

For example, the yaw groove 38a is dug into a groove structure in each of the plurality of yoke teeth 32 of the abducted stator yoke 31, and the iron projection 38b has a plurality of skew tooth tips 33 ) protrudes into a rib structure on each. In this case, the concave groove 38a and the convex projection 38b are each formed in a vertical straight line, and in particular, the convex projection 38b is concave groove 38a and They protrude from the inner surface of the skew tooth tip 33 so as to face each other.

Therefore, in the assembly of the abducted stator yoke 31 and the skew tooth tip 33, the yaw groove 38a and the convex projection 38b are matched with each other, and then the skew tooth tip 33 It is fixed to the yoke tooth 32 by pushing it from the top to the bottom or from the bottom to the top, and the assembled state with the abducted stator yoke 31 is maintained.

As described above, in the skew tooth separate motor 1 according to the present embodiment, the stator skew tooth tip 13 or the skew tooth tip 33 manufactured separately from the stator 10 or the rotor 20 is the stator 10 ) and the rotor 20, it is possible to manufacture a stator skew tooth tip applied only to the tooth tip with a skew mold in the stator skew manufacturing process. In particular, the stator yoke tooth of a straight laminated structure and the stator skew tooth of a skew laminated structure are separated. When assembling the stator of the motor, it is possible to solve both the manufacturing process difficulties of the existing skew type stator and the winding difficulty of increasing the power density of the step skew type rotor.

1: skew type motor
3: shaft 10: stator
11: stator yoke 12, 32: yoke-tooth
13: stator skewed tooth tip
13a, ..., 13n: first to n stator skewer toe tips
14: skewed tooth
15: slot open (15) 18,38: assembly part
18a, 38a: concave groove 18b, 38b: iron projection
20: Rotor
30: abduction stator 31: abduction stator yoke
33: skewed tooth tip

Claims (14)

A stator skewed tooth tip or skewed tooth tip is included between the stator and the rotor,
The stator skew toe tip or the skew toe tip is manufactured separately from the stator or the rotor.
A motor characterized in that.
The motor of claim 1 , wherein the stator skew-tooth tip is positioned between an inner diameter of the stator and an outer diameter of the rotor in an inner space of the stator.
The method according to claim 2, wherein the stator skew tooth tip has a skew tooth inclined at a skew angle,
The motor characterized in that the skew teeth form a radial arrangement structure with a predetermined tooth radiation angle.
The motor according to claim 3 , wherein the skew teeth connect adjacent skew teeth of the radial arrangement structure to a slot open.
The motor according to claim 3, wherein a plurality of stator skew toe tips form a stacked structure.
The method according to claim 3, wherein the skew tooth is fixed to the yoke tooth of the stator by an assembly part,
The assembly part is a motor, characterized in that coupled to the yaw (凹) groove and the convex (凸) protrusion.
The method according to claim 6, wherein the yoke groove is dug into the yoke tooth in a groove structure,
The motor, characterized in that the iron (凸) protrusion protrudes from the skew tooth in a rib structure.
The motor according to claim 2, wherein the stator has a segment-integrated structure, and the rotor has a straight structure.
The motor of claim 1 , wherein the skew-tooth tip is positioned between an outer diameter of the stator and an inner diameter of the rotor in an outer space of the stator.
The motor according to claim 9 , wherein the skew tooth tip includes a skew tooth tip inclined at a skew angle, and the skew tooth tip forms a radial arrangement structure.
11. The motor of claim 10, wherein the skew tooth tip forms the radial array structure with a predetermined tooth radiation angle applied to the yoke tooth of the stator.
The method according to claim 11, wherein the skew tooth tip is fixed to the yoke tooth and the assembly part,
The assembly part is a motor, characterized in that coupled to the yaw (凹) groove and the convex (凸) protrusion.
The motor according to claim 12, wherein the concave groove is dug into the yoke tooth in a groove structure, and the convex protrusion protrudes from the skew tooth tip in a rib structure.
The motor according to claim 9, wherein the stator has an abducted stator yoke structure.

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