Motor rotor of permanent-magnetic synchronous tractor

Abstract

The invention provides a motor rotor of a permanent-magnetic synchronous tractor, which belongs to the technical field of elevators and solves the problem that the magnetic steels of the conventional motor rotor are easy to drop. The motor rotor of the permanent-magnetic synchronous tractor comprises a rotor body with a step-shaped bottom surface and an annular inner wall, wherein a plurality of uniformly distributed magnetic steels are stuck on the annular inner wall of the rotor body. The motor rotor is characterized in that: two ends of the magnetic steels are provided with an inner magnetic steel end plate and an outer magnetic steel end plate which are of annular sheets and are fixed on the rotor body respectively, the inner and outer magnetic steel end plates are provided with positioning parts with the same magnetic steel number and position, and the two ends of the magnetic steels are inserted into the corresponding positioning parts. The motor rotor can simplify the fixed structures of the magnetic steels and reduce the cost, and the magnetic steels can be firmly and fixedly connected on the motor rotor and do not drop.

Description

technical field [0001] The invention belongs to the technical field of motors, and relates to a motor rotor of a permanent magnet synchronous traction machine, in particular to a fixing method of magnetic steel in the motor rotor. Background technique [0002] The permanent magnet synchronous traction machine is more and more widely used, and gradually becomes the mainstream type of traction machine. Due to better technology and better performance, the motor rotors of permanent magnet synchronous traction machines use surface-mounted magnets or semi-buried magnets, and for this type of motor rotors, adhesives are generally used to attach the magnets fixed on the motor rotor. However, due to the heating of the motor and the impact of the tangential force of the motor, the adhesive will age and lose its effect after long-term operation, and the magnetic steel will often fall off, which will have a great impact on the stable operation of the traction machine motor. It may eve...

AI Technical Summary

Problems solved by technology

Although this technical solution can fix the magnetic steel, there are many parts and the manufacturing process is complicated

Another example is the utility model patent ZL200520098758.X which discloses a permanent magnet rotor, which uses a retainer to fix the magnetic steel. This technical solution has defects such as poor positioning accuracy and failure of the retainer.

Another example is the utility model patent ZL02248618.6 which discloses "a permanent magnet rotor". The edge of the side of the magnetic steel end plate is provided with flanges uniformly distributed in the circumferential direction, and the magnetic steel is fixed by adjacent flanges. This technology The disadvantage of the scheme is that the processing of the magnetic steel end plate with flange is complicated and the cost is high

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