The motor structure in which the sheath and the rotor laminated iron core are combined

Abstract

The invention provides a motor structure with integration of a sheath and a rotor lamination core. The motor structure comprises a rotor core formed by rotor laminations through lamination, a sheath with solid raindrop-shaped cage bars and a rotor end surface pressure plate. The sheath with raindrop-shaped solid cage bars is installed on the rotor lamination core. The shapes of the solid raindrop-shaped cage bars match the groove shapes of the rotor laminations. The rotor end surface pressure plate is embedded or inserted into the sheath at a high temperature. The starting performance of the motor can be raised. During the starting process, when the slip ratio is large, the solid raindrop-shaped sheath plays a leading role, the starting current is small, and the starting torque is large. During the operation process, when the slip ratio is small, the cast aluminum cage bars start to play a role, the equivalent resistance of the whole rotor is small, and the starting performance during the starting process is ensured. In addition, the provided motor structure can reduce the risk of separation of the rotor sheath and the lamination core caused by a centrifugal force effectively, and therefore the high-speed operation safety performance of the motor is raised.

Description

technical field

[0001] The invention relates to the technical field of high-speed motors, in particular to a motor structure in which a sheath and a rotor laminated iron core are integrated. Background technique

[0002] The rotor structure of high-speed motors usually adopts a solid rotor structure. When the high-speed solid rotor motor is running, the eddy current loss on the rotor surface is large, the temperature is high, and the efficiency is low; the surface sheath of the high-speed motor is combined with the laminated iron core. When the iron core composite structure is running, the rotor magnetic field penetrates into the rotor laminated body. At this time, the rotor works as a laminated rotor motor. The temperature of the rotor body is lower than that of the solid rotor body, and the efficiency and power factor are higher. However, considering the structural size of the motor and the mechanical strength of the rotor, the surface sheath and the laminated iron core of...

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