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Motor rotor punch and permanent magnet motor

A motor rotor and punching technology, applied in the field of permanent magnet motors, can solve the problems of reduced output torque, reduced utilization of magnetic steel, increased motor costs, etc., and achieves the effect of reducing manufacturing costs

Inactive Publication Date: 2019-01-08
上海元城汽车技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is to increase the thickness of the magnet steel or the grade of the magnet steel, the cost of the motor will be greatly increased; and the practice of keeping the magnet steel away from the armature and the air gap will reduce the utilization rate of the magnet steel or significantly reduce the output torque, and increase the motor cost in disguise. cost

Method used

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  • Motor rotor punch and permanent magnet motor
  • Motor rotor punch and permanent magnet motor
  • Motor rotor punch and permanent magnet motor

Examples

Experimental program
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Effect test

no. 1 example

[0034] Please refer to figure 1 , this embodiment provides a motor rotor punching plate 100 , which is applied to new energy electric vehicles, and includes a punching plate body 1 .

[0035] In this embodiment, there are multiple groups of magnetic steel groove groups evenly distributed in the circumferential direction of the punching body 1, and each group of magnetic steel groove groups includes a first magnetic steel groove 2 and two second magnetic steel grooves 3, and two second magnetic steel groove groups The magnetic steel grooves 3 are symmetrically distributed in a V shape along the center line of the first magnetic steel groove 2, and the tip of the V shape faces the center of the punch body 1, and the first magnetic steel groove 2 is located at the opening end of the V shape. Both ends of the length direction of the magnetic steel groove 2 are symmetrically provided with two first magnetic shielding air grooves 51, which limit the magnetic flux leakage magnetic fl...

no. 2 example

[0051] After research, the researchers found that the motor rotor stamping 100 provided by the present invention, on the basis of the above-mentioned first embodiment, can also make the following optional other structural solutions, which are specifically described as follows:

[0052] Such as Figure 4 As shown, in this embodiment, there are two magnetically permeable protrusions 7 , one of which is located on the first connecting edge 321 , and the other is located on the third connecting edge 323 . It is equivalent to two magnetically conductive protrusions 7 arranged opposite to each other, which is convenient for guiding the magnetic force lines to pass through the first groove segment 32 .

no. 3 example

[0054] This embodiment provides a permanent magnet motor, including the above-mentioned motor rotor stamping 100 .

[0055] In this embodiment, the above-mentioned motor rotor stamping 100 is applied to the permanent magnet motor, which improves the irreversible demagnetization resistance of the motor, reduces the cost of the permanent magnet, reduces the manufacturing cost of the permanent magnet motor, and meets the needs of users .

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Abstract

The invention relates to a motor rotor punching sheet and a permanent magnet motor, belonging to the technical field of permanent magnet motors. A plurality of groups of magnetic steel groove groups are arranged along the circumferential rotation symmetry of the punching sheet body, each set of magnetic steel grooves includes a first magnetic steel groove and two second magnetic steel grooves, thetwo second magnetic steel grooves are V-shaped and the V-shaped tip points to the center of the punch body, the first magnetic steel groove is located at an open end of the V-shape of the two secondmagnetic steel grooves, Two first magnetic shielding air grooves are symmetrically formed at both ends of the first magnetic steel groove, a second magnetic shielding air groove is formed between thetwo second magnetic steel grooves, and an inner side wall of the second magnetic steel groove near one end of the first magnetic steel groove is provided with at least one magnetic conductive protrusion for guiding the traveling direction of the magnetic force line. The rotor blades of the motor can greatly improve the anti-irreversible demagnetization ability of the permanent magnet motor under the condition that the output peak torque changes little. The permanent magnet motor using the rotor punching piece of the motor reduces the manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a motor rotor punch and a permanent magnet motor. Background technique [0002] Permanent magnet motors are widely used in various fields of industrial production and life. With the development of the new energy vehicle industry, permanent magnet motors have become the preferred drive components for pure electric new energy vehicles. The most fundamental factor that restricts the replacement of fuel vehicles by new energy vehicles is cost. Therefore, how to reduce the cost of each main component of new energy vehicles has become one of the hot spots in this field. [0003] Permanent magnet motor is the core drive component of new energy vehicles, and its cost reduction is also one of the key research technologies in this field. Permanent magnets have become a key factor in determining the cost of permanent magnet motors, especially as the price of rare earths co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/2766Y02T10/64
Inventor 米秀峰张帆史韦意
Owner 上海元城汽车技术有限公司
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