Punching sheet structure of vector reluctance motor

Abstract

A punching sheet structure of a vector reluctance motor comprises a rotor punching sheet and a stator punching sheet, the rotor punching sheet is provided with a plurality of rotor pole teeth, the stator punching sheet is provided with a plurality of stator pole teeth, the rotor pole teeth on the rotor punching sheet are trapezoidal, a pole tooth groove between every two rotor pole teeth is trapezoidal, a plurality of magnetic isolation holes are formed in the rotor punching sheet around a rotor shaft hole, and the magnetic isolation holes are communicated with the rotor shaft hole. The positions and the number of the magnetic isolation holes are in one-to-one correspondence with the positions and the number of the rotor pole teeth, and the height h of the rotor pole teeth is larger than the length L from the pole tooth grooves to the magnetic isolation holes.

Description

TECHNICAL FIELD

[0001] The utility model relates to vector reluctance motor field, concretely relates to the lamination structure of vector reluctance motor. BACKGROUND

[0002] Vector reluctance motor (Vector Reluctance Motor, VRM) is a kind of motor based on the principle of magnetic resistance change, it utilizes the principle of minimum magnetic resistance, the amplitude and phase of current are controlled to adjust the magnetic field direction between stator and rotor, to realize accurate speed and torque control, its control mode adopts vector control technology, can independently adjust magnetic flux and torque, realizes high-performance control. Its torque fluctuation is small, electromagnetic characteristic is good, high efficiency energy saving, flexibility and response speed are fast, is widely used in electric vehicle. Therefore, better control vector reluctance motor, improve motor efficiency has become an important research topic of people. SUMMARY

[0003] The utility model provides a kind of lamination structure of vector reluctance motor, it is under the condition of guaranteeing rotor lamination performance and strength, by being provided with multiple magnetic isolation holes on the rotor lamination hole of rotor lamination, reduce the conduction path of magnetism, make magnetic flux concentrate, improve motor efficiency.

[0004] The technical scheme of the utility model is as follows: a kind of lamination structure of vector reluctance motor, including rotor lamination, stator lamination, the rotor lamination is equipped with multiple rotor pole teeth, stator lamination is equipped with multiple stator pole teeth, the rotor pole tooth on the rotor lamination is trapezoidal, the pole tooth slot between two rotor pole teeth is trapezoidal, multiple magnetic isolation holes are set on the rotor lamination hole of rotor lamination, the position and quantity of the magnetic isolation hole are one-to-one corresponding with the position and quantity of rotor pole tooth, the height h of the rotor pole tooth is greater than the length L of pole tooth slot to magnetic isolation hole.

[0005] Preferably, multiple heat dissipation holes are equipped between the magnetic isolation hole and rotor shaft hole, the number of the heat dissipation hole is same with the number of magnetic isolation hole, the heat dissipation hole and magnetic isolation hole are staggered arrangement.

[0006] Preferably, the rotor lamination is equipped with 15 rotor pole teeth, and the stator lamination is equipped with 18 stator pole teeth.

[0007] Preferably, the magnetic isolation hole is pentagonal hole, and the angle of the angle of the magnetic isolation hole directly opposite the rotor pole tooth is 120 °.

[0008] Preferably, the stator pole tooth is rectangular.

[0009] Preferably, multiple welding notches are uniformly distributed on the outer circumference of the stator lamination.

[0010] Preferably, a positioning notch is arranged on the outer circumference of the stator lamination.

[0011] Preferably, both the rotor laminations and the stator laminations are made of 35W300 material as the magnetic conductive material.

[0012] The advantages of this utility model are:

[0013] 1. This utility model sets multiple magnetic isolation holes and multiple heat dissipation holes around the rotor shaft hole on the rotor lamination, which reduces the weight of the rotor, and reduces costs by selling the material punched out of the magnetic isolation holes and heat dissipation holes as scrap.

[0014] 2. The magnetic isolation holes on the rotor laminations of this invention are closer to the rotor pole teeth, which concentrates the magnetic flux, reduces the magnetic conduction path, and reduces the iron loss of the motor. The efficiency of this invention is improved by 2%.

[0015] 3. This invention reduces the moment of inertia, enabling the motor to start and stop quickly.

[0016] 4. In addition to the magnetic shielding holes for heat dissipation, this utility model also has special heat dissipation holes for rotor heat dissipation, ensuring that the heat generated by the rotor during rotation can be quickly carried away and the rotor can be cooled down. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the rotor lamination structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the stator lamination structure of this utility model. Detailed Implementation

[0019] See Figure 1 , Figure 2A lamination structure for a vector reluctance motor includes a rotor lamination 1 and a stator lamination 2. The rotor lamination 1 has 15 rotor pole teeth 11, and the stator lamination 2 has 18 stator pole teeth 21. The rotor pole teeth 11 on the rotor lamination 1 are trapezoidal, and the pole tooth slots 12 between two rotor pole teeth 11 are also trapezoidal. This means that the rotor pole teeth 11 of this invention do not require chamfering, optimizing the magnetic field distribution, reducing magnetic field distortion, and improving the efficiency and performance of the motor. The rotor lamination 1 has 15 magnetic isolation holes 13 arranged around the rotor shaft hole 15. The magnetic isolation holes 13 are pentagonal, and the angle between the magnetic isolation holes 13 and the rotor pole teeth 11 is 120°. This arrangement allows for more concentrated magnetism and reduces the magnetic conduction path. Fifteen heat dissipation holes are provided between the magnetic isolation hole 13 and the rotor shaft hole 15. The heat dissipation holes 14 and the magnetic isolation holes 13 are arranged alternately. By providing additional heat dissipation holes 14, the heat generated by the rotor during rotation can be quickly carried away, thus cooling the rotor. The position and number of the magnetic isolation holes 13 correspond one-to-one with the position and number of the rotor pole teeth 11. The height h of the rotor pole teeth 11 is greater than the length L from the pole tooth slot 12 to the magnetic isolation hole 13, ensuring more concentrated magnetism and reducing the magnetic conduction path. The stator pole teeth 21 are rectangular and also without chamfering. Six welding notches 22 are evenly distributed on the outer circumference of the stator lamination 2 for welding and fixing. A positioning notch 23 is provided on the outer circumference of the stator lamination 2 for positioning. Both the rotor lamination 1 and the stator lamination 2 use 35W300 material as the magnetic conductive material, which has good magnetic conductivity.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A lamination structure for a vector reluctance motor, comprising rotor laminations (1) and stator laminations (2), wherein the rotor laminations (1) are provided with a plurality of rotor pole teeth (11) and the stator laminations (2) are provided with a plurality of stator pole teeth (21), characterized in that: The rotor pole teeth (11) on the rotor lamination (1) are trapezoidal, and the pole tooth groove (12) between two rotor pole teeth (11) is trapezoidal. Multiple magnetic isolation holes (13) are provided around the rotor shaft hole (15) on the rotor lamination (1). The position and number of the magnetic isolation holes (13) correspond one-to-one with the position and number of the rotor pole teeth (11). The height h of the rotor pole teeth (11) is greater than the length L from the pole tooth groove (12) to the magnetic isolation hole (13).

2. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: Multiple heat dissipation holes are provided between the magnetic isolation hole (13) and the rotor shaft hole (15). The number of heat dissipation holes (14) is the same as the number of magnetic isolation holes (13). The heat dissipation holes (14) and magnetic isolation holes (13) are arranged alternately.

3. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: The rotor lamination (1) has 15 rotor pole teeth (11), and the stator lamination (2) has 18 stator pole teeth (21).

4. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: The magnetic isolation hole (13) is a pentagonal hole, and the angle between the magnetic isolation hole (13) and the rotor pole tooth (11) is 120°.

5. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: The stator pole teeth (21) are rectangular.

6. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: Multiple welding notches (22) are evenly distributed on the outer circumference of the stator lamination (2).

7. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: The stator lamination (2) has a positioning notch (23) on its outer circumference.

8. The lamination structure of the vector reluctance motor according to claim 1, characterized in that: Both the rotor lamination (1) and the stator lamination (2) are made of 35W300 material as the magnetic conductive material.

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