A motor rotor stamping sheet, motor rotor, motor and new energy vehicle

Abstract

The invention relates to the technical field of new energy vehicles, and discloses a motor rotor punch, a motor rotor, a motor and a new energy vehicle. The motor rotor stamping includes a permanent magnet slot, and the permanent magnet slot includes a first slot body, a second slot body, and a third slot body connected in sequence, and the second slot body is used to place a permanent magnet, and the first slot body is opposite to the first slot body. The body and the second groove are set closer to the outer circle of the punch, and a magnetic isolation bridge is formed between the first groove and the outer circle of the punch. The outline of the first groove includes the first side, the second side, the second For the three sides, the fourth side and the fifth side, a first transition side is provided between the first side and the second side, and a second transition side is provided between the second side and the third side. The motor rotor stamping provided by the invention can effectively reduce the stress of the magnetic isolation bridge, reduce the thickness of the magnetic isolation bridge, ensure the centrifugal stress intensity of the rotor, and improve the electromagnetic performance of the motor, which can be applied to high-speed vehicle drive motor.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a motor rotor punch, a motor rotor, a motor and a new energy vehicle. Background technique [0002] As people pay more and more attention to environmental protection and efficient use of energy, green products such as electric vehicles are becoming more and more popular. The miniaturization and integration of electric drive systems for new energy vehicles is an inevitable development trend in the future. An effective measure to realize the miniaturization of the driving motor is to increase the high voltage and high speed. However, the high speed of the motor must face the problem of the centrifugal stress intensity of the rotor. Most of the rotor structures of existing high-speed motors increase the thickness of the magnetic isolation bridge on the basis of general speed motors to be suitable for high-speed operation. This method often sacrifices electromagnetic per...

AI Technical Summary

Problems solved by technology

The effective measure to realize the miniaturization of the driving motor is to increase the high voltage and high speed, but the high speed of the motor will inevitably face the problem of centrifugal stress intensity of the rotor

Most of the rotor structures of existing high-speed motors increase the thickness of the magnetic isolation bridge on the basis of general speed motors to be suitable for high-speed operation. This method is often at the expense of electromagnetic performance, and is not the preferred solution for high-speed motor rotor topology.

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