Coaxial conductive current collector

Abstract

The coaxial conductive current collector includes one water cooled inner electrode on a rotating shaft, one conducting inner electrode copper plate, water cooled outer electrode, one insulating covering between the inner electrode and the outer electrode and one conducting outer electrode copper plate. It features the middle inner electrode conducting layer between the conducting inner electrode copper plate and the water cooled inner electrode, and the middle outer electrode conducting layer between the conducting outer electrode copper plate and the water cooled outer electrode. The present invention has the advantages of great conducting area, short conducting distance, low electrical energy loss, capacity of facilitating start of MF power source device, less material consumption and easy installation.

Description

technical field [0001] The invention relates to a main component connected with an intermediate frequency power supply device and an intermediate frequency induction heating coil in an intermediate frequency vacuum induction melting furnace, in particular to a coaxial conductive current collecting device. Background technique [0002] The coaxial conductive current collector is mainly used in the intermediate frequency vacuum induction melting furnace, and is the main component for the connection between the intermediate frequency power supply device and the intermediate frequency induction heating coil. At present, the current collectors of vacuum induction melting furnaces use multiple cables to transport intermediate frequency current (see Figure 1). The water-cooled outer electrode of the rotating shaft, the insulating sleeve of the inner and outer electrodes, and the water-cooled inner electrode of the rotating shaft are all components of the coaxial power-feeding electr...

AI Technical Summary

Problems solved by technology

The collector device of the vacuum induction melting furnace currently adopts multiple cables as the transmission medium frequency current (see Figure 1). The water-cooled outer electrode of the rotating shaft, the inner and outer electrode insulation sleeves, and the water-cooled inner electrode of the rotating shaft are all components of the coaxial power-feeding electrode. , the outer electrode conductive cable is connected to the two outer electrode conductive copper plates, the inner electrode conductive cable is connected to the two inner electrode conductive copper plates respectively, the skin effect, proximity effect, and ring of the inner electrode conductive cable and the outer electrode conductive cable Under the action of the effect, and the distance between the conductive copper plates of the inner and outer electrodes is relatively long, the voltage drop of multiple cables is relatively large. Generally, when the intermediate frequency voltage of the two poles is 250V, the voltage drop of the collector device of multiple cables is between 15V-20V. , the power loss is very large; and it causes a large impedance in the whole set of intermediate frequency transmission electromagnetic field, which makes it difficult to start the intermediate frequency power supply device; the copper material used is large, the structure is large, and a large space is required for installation.

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