Squirrel-cage rotor adapts adapting skin effect to improve conductivity of conducting bar

Abstract

The invention discloses a squirrel-cage rotor adapting to a skin effect to improve the conductivity of a conducting bar. The squirrel-cage rotor comprises a first fastening ring and a second fasteningring, and end ring sets facilitating heat dissipation are fixedly installed on the inner wall of the first fastening ring and the inner wall of the second fastening ring. Composite conducting bar mechanisms with electrical conductivity and thermal conductivity are mounted on the inner side of the end ring group at equal intervals; according to the squirrel-cage rotor adapting to the skin effect to improve the conductivity of the conducting bar, the cost is reduced by reducing the use of silver and copper, and most of the composite conducting bar layer is made of aluminum, so that the composite conducting bar layer is light in weight, the dynamic load generated by the operation of the composite conducting bar layer is reduced, and stable current transmission is facilitated to ensure that the conductivity and the thermal conductivity are in the optimal state.

Description

technical field [0001] The invention relates to the technical field of squirrel-cage rotors, in particular to a squirrel-cage rotor that adapts to the skin effect to improve the conductivity of a guide bar. Background technique [0002] The squirrel-cage motor is a kind of three-phase asynchronous motor, and the squirrel-cage rotor is the rotating part of the squirrel-cage motor. Generally, a copper or aluminum rotor coil is cast in a cage-shaped slot on the rotor core. The coil is a closed loop that is not connected to other parts, and its main function is to suppress the stator current. [0003] The existing squirrel-cage rotor generates induced current in the rotating magnetic field, but due to the existence of the skin effect, the distribution of the induced current on the cross-section of the bar is uneven, the current density on the surface of the conductor is greater than that in the center, and the current will Concentrate on the surface of the conductor to flow, wh...

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Problems solved by technology

[0003] The existing squirrel-cage rotor generates induced current in the rotating magnetic field, but due to the existence of the skin effect, the distribution of the induced current on the cross-section of the bar is uneven, the current density on the surface of the conductor is greater than that in the center, and the current will Concentrate on the surface of the conductor to flow, which is equivalent to the reduction of the cross section of the conductor, the increase of the resistance, and the increase of the calorific value, which makes the electrical and thermal conductivity poor. Therefore, we propose a method to adapt to the skin effect to improve the conductor strip squirrel cage rotor

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