Integrated cast copper rotor

Abstract

The invention discloses an integrated cast copper rotor. The integrated cast copper rotor is mainly characterized in that a rotor iron core is formed by laminating a certain number of silicon steel sheets with same size and shape, installation holes are formed in the center of the silicon steel sheets, a certain number of conduction bar holes are uniformly formed at the periphery of each silicon steel sheet, the conduction bar holes of all silicon steel sheet are laminated and connected to form conduction bar grooves in the rotor iron core, conduction bars are die-casted in the conduction bar grooves, press plates are arranged at the two ends of the rotor iron core and are die-casted and connected with the conduction bars, the silicon steel sheets are circularly-shaped, the conduction bar hole on each silicon steel sheets is a combined hole of a waist-shaped hole and a round hole, the waist-shaped hole is large in one head and small in the other head and is arranged along a diameter direction of the silicon steel sheet, the large head of the waist-shaped hole is arranged at the outer side of an annular circumference of the silicon steel sheet, the small head of the waist-shaped hole is arranged at the inner side of the annular circumference of the silicon steel sheet, the round hole is arranged outside the large head of the waist-shaped hole, the large head of the waist-shaped hole and the round hole are communicated via a narrow connection gap, the width of the gap is smaller than the width of the waist-shaped hole and the diameter of the round hole, and a certain number of rectangular grooves are uniformly arranged on the outer end surface of each press plate along the diameter direction of the press plate.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an integral cast copper rotor. Background technique [0002] There are two traditional motor rotor structures: one is the aluminum rotor structure, the aluminum ingot is heated and driven into the laminated rotor punch through the die-casting machine, and at the same time, the end ring, balance column and wind are formed by die-casting at both ends of the rotor core. Leaf structure; this structure is very common in small and medium-sized motors. Because the resistivity of aluminum is 0.0434 and that of copper is 0.0217, the higher the resistivity, the higher the resistance and the higher the motor loss. In small motors that require ultra-high efficiency and ultra-ultra-high efficiency levels, rotor bars are used Aluminum strips will make it difficult to ensure that the efficiency level of the motor reaches the corresponding target. The density of aluminum is lower than that of c...

AI Technical Summary

Problems solved by technology

This structure has very high requirements on the matching degree of the copper strip and the rotor groove shape, and the welding quality of the end ring and the guide strip, otherwise it will cause the copper strip to move in the groove and desolder, which will bring hidden dangers to the long-term operation of the motor , the reliability of this kind of copper bar rotor is low

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