Variable-frequency power electronic capacitor

Abstract

The invention provides a variable-frequency power electronic capacitor and relates to the technical field of organic medium fixed capacitors. The variable-frequency power electronic capacitor comprises a shell, wherein the shell is internally provided with a core body; both ends of the core body are connected with a metal spraying layer; the outer side of the metal spraying layer is connected with a soldering lug; filling materials are filled into the shell; the shell is made from none-ferromagnetic material with low high-frequency eddy current heating; the none-ferromagnetic material shell is of an aluminum or copper shell; and a polypropylene film is used as medium of the core body. The capacitor has the advantages that the inner structure is more reasonable, the high-frequency large current is adapted by using the low ESL (equivalent series inductance) and ESR (equivalent series resistance) technologies, the self-inductance and the equivalent series resistance are reduced, and the heating loss is decreased; the partial discharge voltage under high frequency is enhanced and the radiating condition is improved, so that the high-frequency property is more excellent and the service life is longer.

Description

Technical field: [0001] The invention relates to the technical field of organic dielectric fixed capacitors, in particular to a variable frequency power electronic capacitor. Background technique: [0002] Frequency conversion energy-saving all-solid-state miniaturized intermediate frequency, high frequency, super audio frequency induction heating equipment. High-power switching power supply and special automatic control system are widely used in aviation, military manufacturing, non-ferrous metal heating, heat treatment gas quenching, annealing and tempering, brazing, hot forging, standard parts production, machinery manufacturing and other fields. , is an energy-saving and environmentally friendly product vigorously promoted by the state. Using special power components and unique inverter technology, the output oscillation frequency can reach up to 400KHZ, especially suitable for rapid heating of small metal objects, etc.: output oscillation power 20-160KVA; output oscill...

AI Technical Summary

Problems solved by technology

[0003] The currently used air-conditioning capacitors mainly have unreasonable design, improper selection of shell structure materials, large volume, and limited operating frequency; poor high-frequency parameter performance, large inherent inductance, large impedance-frequency characteristics and equivalent series resistance; when high-frequency When the current increases, the consumption of active power also increases, and the capacitor generates heat and shortens its life. The temperature rise of the heat generation breaks through the thermal balance and causes thermal breakdown;

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