A water-cooled film capacitor

Abstract

A water-cooled thin film capacitor (2), comprising a shell (2-1). A cooling cavity (2-2) and a capacitor core are provided in the shell (2-1); the capacitor core is connected to a direct current output end (2-4) by means of a bus provided in the shell (2-1); the direct current output end (2-4) is exposed out of the shell (2-1) at the back side of an opening of the cooling cavity (2-2); liquid cooling interfaces (2-7) communicated with the cooling cavity (2-2) are respectively provided at the left and right sides of the opening of the cooling cavity (2-2); a direct current input end (2-3) is provided at the front side of the shell (2-1). An IGBT is provided on the shell (2-1) of the thin film capacitor (2) to form a strong electrical device for a vehicle-mounted driver. A water-cooling structure is additionally provided on the shell (2-1) of the capacitor (2), and the bus for connecting the capacitor (2) and the IGBT (3) is built in the capacitor core, i.e., a water cooling plate, a housing, and the bus are integrated, so that not only the structure of the driver is simplified, but also the overall performance of the unit is improved. The integrated strong electrical device has not only an energy storage function of the capacitor but also a heat dissipation function of an insulated gate bipolar transistor. In a driving circuit, the strong electrical device can not only provide current and voltage supports for a high-frequency switch of the insulated gate bipolar transistor, but also can perform water-cooling heat dissipation on the insulated gate bipolar transistor by means of a water path thereof.

Description

technical field [0001] The invention relates to a film capacitor, in particular to a film capacitor with water cooling function, and belongs to the technical field of capacitors. Background technique [0002] The core of new energy vehicles (hybrid, hydrogen, pure electric, etc.) is electric energy as the driving energy, and the conversion of electric energy to mechanical energy requires a motor, and of course a drive module. IGBT, the core device of the drive module, needs film capacitors and water-cooled plates to support its operation during the inverter process (film capacitors support sudden changes in voltage and current, and the water-cooling system is used to cool the IGBT’s own heat), otherwise the inverter circuit cannot operate. [0003] As we all know, the film capacitor core uses an organic film as an insulating medium, and a metal layer is evaporated on the surface of the organic film as an electrode, and is wound in pairs to form a capacitor core. Evaporated ...

AI Technical Summary

Problems solved by technology

[0009] The problem to be solved by the present invention is that the volume of the existing vehicle-mounted drive is relatively large

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