CN219204205U

CN219204205U - Motor capable of reducing temperature rise of motor

Info

Publication number: CN219204205U
Application number: CN202222939110.7U
Authority: CN
Inventors: 蒋春杰; 于娜; 蔡玲民
Original assignee: Shanghai Zhihui Technology Co ltd
Current assignee: Shanghai Zhihui Technology Co ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-06-16
Anticipated expiration: 2032-11-04

Abstract

The utility model discloses a motor for reducing temperature rise of the motor, which comprises a stator iron core and a rotor iron core, wherein the stator iron core is formed by laminating stator punching sheets, 12 coil grooves are uniformly distributed on the stator punching sheets and are used for placing winding coils, the coil grooves are provided with a capacity expansion area which is 16% larger than the area of the coil grooves of the existing stator punching sheets, and a capacity expansion space is formed after the stator iron core is laminated; the rotor core is formed by laminating rotor punching sheets, the rotor punching sheets are provided with shaft holes, convex keys are arranged in the shaft holes and matched with a motor shaft to achieve the effects of centering and torque transmission, and the shaft holes are positioned at the center of the punching sheet body 1; the rotor core is provided with V-shaped permanent magnet groove groups which are uniformly distributed on the rotor punching sheet, and two sides of each V-shaped permanent magnet groove group are respectively provided with a straight line groove and are provided with permanent magnets.

Description

Motor capable of reducing temperature rise of motor

Technical Field

The utility model relates to a motor, in particular to a motor for reducing temperature rise of the motor.

Background

At present, the electric tricycle industry develops for more than ten years, but the motor is slowly updated, the matched motor is a technology more than ten years ago, and the reliability, the durability and the like of the product have relatively large defects. At present, technology upgrading is urgently needed so as to meet the final use requirement, and the higher reliability, durability, stability and the like of products are met for customers. In particular, over the years, the problems of the motor used in the market have been more and more pronounced, in particular because of the excessive temperatures, which lead to the motor burning out. Under the background, how to greatly reduce the temperature rise of the motor and improve the product performance becomes a main problem at present.

Disclosure of Invention

The utility model aims to solve the defects and provides a motor for reducing the temperature rise of the motor.

The above object of the present utility model is achieved by the following technical solutions: the utility model provides a motor for reducing motor temperature rise, includes stator core and rotor core, its characterized in that:

the stator core is formed by laminating stator punching sheets, 12 coil grooves are uniformly distributed on the stator punching sheets and used for placing winding coils, the coil grooves are provided with a capacity expansion area which is 16% larger than the area of the coil grooves of the existing stator punching sheets, and after the stator core is laminated, a capacity expansion space is formed, so that more coils can be accommodated, the copper consumption of the motor is reduced, the heating is reduced, and the heat dissipation area is increased;

the rotor core is formed by laminating rotor punching sheets, the rotor punching sheets are provided with shaft holes, convex keys are arranged in the shaft holes and matched with a motor shaft to achieve the effects of centering and torque transmission, and the shaft holes are positioned at the center of the punching sheet body 1; the rotor core is provided with V-shaped permanent magnet groove groups which are uniformly distributed on the rotor punching sheet, and two sides of each V-shaped permanent magnet groove group are respectively provided with a straight line groove and are provided with permanent magnets.

Further, the expanded area of the coil slots expands circumferentially or radially outward along the stator laminations.

Further, the number of the V-shaped permanent magnet groove groups is 10.

Further, the outer diameter A of the stator punching sheet is 119-121mm.

Further, the inner diameter B of the stator punching sheet is 68-69mm.

Further, the outer diameter C of the rotor punching sheet is 67-68mm.

Further, the length H of the straight groove is 13-15mm.

Further, the included angle F of two linear grooves in the V-shaped magnetic steel groove group is 59-62 degrees.

Compared with the prior art, the utility model has the advantages that: the utility model achieves the effects of greatly reducing the temperature rise of the motor by optimizing the stator and rotor slot types, the basic performance of the motor meets the original level, and the utility model has the advantages of better effects on cogging torque, noise and the like than the similar products in the prior art, good temperature rise control of the motor, small cogging torque of the motor, stable operation, low noise, low loss and the like.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a comparative plot of motor drag load temperature rise.

Detailed Description

The utility model is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the motor for reducing the temperature rise of the motor comprises a stator iron core 1 and a rotor iron core 2, wherein the stator iron core 1 is formed by laminating stator punching sheets, the outer diameter A of the stator punching sheets is 119-121mm, the inner diameter B of the stator punching sheets is 68-69mm, 12 coil grooves 11 are uniformly distributed on the stator punching sheets and are used for placing winding coils, the coil grooves 11 are provided with expansion areas which are 16% larger than the area of the coil grooves of the existing stator punching sheets and expand along the circumferential direction or the radial direction of the stator punching sheets, and after the stator iron core 1 is laminated, an expansion space is formed, so that more coils can be accommodated, the copper consumption of the motor is reduced, the heating is reduced, and the heat dissipation area is increased;

the rotor core 2 is formed by laminating rotor punching sheets, the outer diameter C of the rotor punching sheets is 67-68mm, the rotor punching sheets are provided with shaft holes, convex keys are arranged in the shaft holes and are matched with a motor shaft to achieve the effects of centering and torque transmission, and the shaft holes 2 are positioned at the center of the punching sheet body 1; the rotor core 2 is provided with 10V-shaped permanent magnet groove groups, the V-shaped permanent magnet groove groups are uniformly distributed on the rotor punching sheet 1, two sides of each V-shaped permanent magnet groove group are respectively provided with a linear groove 22, the length H of each linear groove 22 is 13-15mm, a permanent magnet (magnetic steel) is arranged, and an included angle F of two linear grooves in the V-shaped magnetic steel groove groups is 59-62 degrees.

Compared with the existing product, the utility model effectively reduces the temperature rise of the motor and improves the reliability and durability of the motor.

The following is the actual performance comparative test data of motor B (second generation motor) of the present utility model and the existing old version motor a (ordinary motor):

1. the testing method comprises the following steps:

under the same condition, the motor A and the motor B are matched with the same controller to perform the performance comparison test of the dynamometer.

2. Test equipment:

the motor specification is old motor A:120 outer diameter, 40 stack height, 48V motor; the novel motor B comprises: 120 outer diameter, 40 stack height, 48V motor; a positive brown wave controller; 1:10 differential package.

3. Test data:

the data measured for motor A and motor B matching the same controller are as follows (1:10 differential packet output end data):

	no-load current (A)	Idle speed of rotation	Efficiency of	Torque (rotational speed)
					Motor A	4.1	321	83.2	200.9(17.8)
Motor B	4.1	321	83.9	213.9(21.3)
					Comparison	Leveling up	Leveling up	Lifting 0.7	Lifting 13Nm

Loading temperature rise data (1:10 differential packet output 150 Nm):

as seen from the temperature rise data in fig. 2, the temperature rise of the motor a is only 3 minutes less than that of the motor a when reaching 200 ℃; and 7.5 minutes were spent on the temperature rise of motor B to 200 degrees. The temperature rise control effect is good, and the temperature rise of the motor is obviously reduced.

In summary, the performance of motor B is much better than motor a.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. The utility model provides a motor for reducing motor temperature rise, includes stator core and rotor core, its characterized in that:

the stator core is formed by laminating stator punching sheets, 12 coil grooves are uniformly distributed on the stator punching sheets and used for placing winding coils, the coil grooves are provided with expansion areas, and after the stator core is laminated, an expansion space is formed;

the rotor core is formed by laminating rotor punching sheets, the rotor punching sheets are provided with shaft holes, convex keys are arranged in the shaft holes and are matched with a motor shaft to achieve the effects of centering and torque transmission, and the shaft holes are positioned at the center of the punching sheet body; the rotor core is provided with V-shaped permanent magnet groove groups which are uniformly distributed on the rotor punching sheet, and two sides of each V-shaped permanent magnet groove group are respectively provided with a straight line groove and are provided with permanent magnets.

2. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: the expansion area of the coil slot expands along the circumferential direction or radial direction of the stator punching sheet.

3. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: the number of the V-shaped permanent magnet groove groups is 10.

4. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: the outer diameter of the stator punching sheet is 119-121mm.

5. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: the inner diameter of the stator punching sheet is 68-69mm.

6. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: the outer diameter of the rotor punching sheet is 67-68mm.

7. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: the length H of the straight groove is 13-15mm.

8. A motor for reducing temperature rise of a motor as set forth in claim 1, wherein: and the included angle F of two linear grooves in the V-shaped permanent magnet groove group is 59-62 degrees.