Mouse cage cast aluminum rotor with low loss

Abstract

The invention belongs to the asynchronous motor manufacturing field. In order to solve a technical problem that a current mouse cage cast aluminum rotor has large loss, the invention provides a mouse cage cast aluminum rotor with low loss. The rotor is formed through stacking rotor punching sheets. Punching grooves of the rotor punching sheets are superposed so as to form a rotor groove. The rotor is characterized in that a copper conducting bar is embedded in the rotor groove; a cast aluminum conducting bar is formed through a cast aluminum operation in a gap between the copper conducting bar and the rotor groove. By using the rotor of the invention, there are the following advantages that the rotor possesses a low electrical resistivity and low rotor active loss compared to a traditional cast aluminum rotor; compared to a cast copper rotor, a technology of the cast aluminum rotor is simple and industrialization is convenient to realize. Simultaneously, according to a need, a proportion relation of a copper conducting bar area and a cast aluminum conducting bar area is adjusted; the resistivity is adjusted; under the condition of reducing the rotor active loss, product cost is reasonably controlled.

Description

technical field [0001] The invention belongs to the field of asynchronous motor manufacturing, in particular to a low-loss squirrel-cage cast aluminum rotor. Background technique [0002] At present, the rotors of domestic asynchronous motors are mostly cast aluminum squirrel cage type. This kind of rotor is formed by stacking the rotor punches with specific groove shape and number of grooves to form an iron core, and then filling the cavity formed by the rotor groove with molten aluminum and casting. . During the operation of the motor, there will always be some active power loss, which is manifested as aluminum loss in the cast aluminum rotor. In order to manufacture a motor with higher efficiency, it is necessary to further reduce the active power loss of the rotor. In China, cast copper with low resistivity is used instead of cast aluminum. Compared with cast aluminum rotor, the loss of cast copper rotor is significantly reduced, but the cast copper process is more comp...

AI Technical Summary

Problems solved by technology

In order to manufacture a motor with higher efficiency, it is necessary to further reduce the active power loss of the rotor. In China, cast copper with low resistivity is used instead of cast aluminum. Compared with cast aluminum rotor, the loss of cast copper rotor is significantly reduced, but the cast copper process is more complicated than the cast aluminum process. , Difficulty, short mold life, it is very difficult to realize industrialization, generally only used in the manufacture of specific types of motors

Images