A Mirror Harmonic Filter Special for Rail Transit

Abstract

The invention discloses a special mirror image harmonic filter for rail transit, which comprises a base and a casing. The base is provided with a connecting platform, the bottom of the casing is attached to the base and fixed by bolts, and the four corners of the top of the connecting platform are connected to a heat shield through fixing columns. , multiple capacitors are installed on the top surface of the connecting table, the capacitor includes an insulating sleeve, the bottom of the insulating sleeve is connected to the top surface of the connecting table, a fixed electrode is installed on the top of the inner cavity of the insulating sleeve, the movable electrode is slidingly clamped in the inner cavity of the insulating sleeve, and the installation and adjustment between the capacitor and the base Mechanism, the top four corners of the heat insulation board are connected to the hanging plate through the fixed column, the inductor is installed at the bottom of the hanging plate, and a plurality of cooling holes are opened on the shell. The capacitor is located under the inductor and separated by a heat shield. The capacitor and the inductor dissipate heat through the cooling holes to avoid the high temperature generated by the inductor from burning the capacitor. The adjustment mechanism can adjust the distance between the movable electrode and the fixed electrode, thereby adjusting the capacitance of the capacitor. Adjust the filtering range of the filter to facilitate the use of different devices on the tram.

Description

technical field [0001] The invention relates to the technical field of rail transit electrical equipment, in particular to a special mirror image harmonic filter for rail transit. Background technique [0002] With the continuous vigorous development of the domestic rail transit industry, more and more cities have rail transit, and a large number of mirror-type harmonic filters need to be used on the trams of the rail transit to eliminate the harmonics generated by the frequency converter. The current filter The inductor and capacitor in the inductor are installed directly adjacent to each other, and the inductor itself can withstand temperature up to 180 degrees Celsius due to the characteristics of insulating materials, but the highest temperature resistance of the capacitor is 105 degrees Celsius, which will easily cause the heat of the reactor to burn the capacitor, and the inductor and capacitor The installation is complicated, and the capacitors are mostly capacitors w...

AI Technical Summary

Problems solved by technology

[0002] With the continuous vigorous development of the domestic rail transit industry, more and more cities have rail transit, and a large number of mirror-type harmonic filters need to be used on the trams of the rail transit to eliminate the harmonics generated by the frequency converter. The current filter The inductor and capacitor in the inductor are installed directly adjacent to each other, and the inductor itself can withstand temperature up to 180 degrees Celsius due to the characteristics of insulating materials, but the highest temperature resistance of the capacitor is 105 degrees Celsius, which will easily cause the heat of the reactor to burn the capacitor, and the inductor and capacitor The installation is complicated, and the capacitors are mostly capacitors with fixed capacitance, which leads to the non-adjustable filtering range of the filter. Therefore, we propose a special mirror harmonic filter for rail transit to solve the above problems.

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