Rotor punching and motor

Abstract

The invention provides a rotor punch and a motor. The rotor punch includes a punch body with tooth slots uniformly distributed on the periphery for winding rotor coils; the tooth slots include a first slot portion and a second slot portion; One alveolar part comprises the first groove side and the second groove side which are arranged symmetrically and are parallel to each other; the second alveolar part comprises the third groove side and the fourth groove side, and the third groove side and the fourth groove The sides are parallel. After adopting the above structure, the present invention has the following advantages: low cost, simple manufacture, small notch leakage reactance, large current, forming the skin effect of the current, reducing the additional loss of the motor, and increasing the starting speed. torque, which improves the performance of the motor as a whole.

Description

technical field

[0001] The invention relates to the technical field of motors, in particular to a rotor punch and a motor. Background technique

[0002] At present, the shape of the tooth slots of the winding coils of the motor rotor punching sheets is randomly designed. Only the use of tests shows that their performances are different, some of which are not very different from each other, while others are very different. The reason is that the layout is not reasonable enough, which not only brings difficulty to the line-entry operation, but also causes the overall performance of the motor to decline.

[0003] There is a motor rotor on the market that adopts all pear-shaped slots. The pear-shaped slots have the advantages of high slot area utilization, long die life, and easy mold manufacturing, but have disadvantages such as low efficiency and low air gap flux density. Contents of the invention

[0004] The purpose of the present invention is to provide a rotor punch and...

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