Film capacitor integrated with safety filter capacitor and motor controller

Abstract

The invention relates to the technical field of film capacitors for motor controllers, in particular to a film capacitor integrated with a safety filter capacitor and a motor controller. The film capacitor comprises a capacitor shell, the capacitor shell is internally provided with a plurality of capacitor bodies arranged side by side and at intervals; the inner wall of the capacitor shell and each capacitor body are fixed into one body through a packaging and filling rubber block; direct current input copper bars are symmetrically arranged at two ends of the capacitor bodies, and the direct current input copper bars are extended out of the packaging and filling rubber block and are installed on the capacitor shell; and the direct current input copper bars are sleeved with an X / Y capacitorfiltering circuit board and a ferrite common mode inductor. According to the film capacitor integrated with the safety filter capacitor and the motor controller, the direct current input copper barsare symmetrically arranged, any one of the direct current input copper bars can be selected to be connected with the input end of the motor controller so as to improve the adaptability of the product;and moreover, the ferrite common mode inductor and the X / Y capacitor filtering circuit board are integrated to improve the performance reliability of the film capacitor.

Description

technical field [0001] The invention relates to the technical field of film capacitors for motor controllers, in particular to a film capacitor integrating safety filter capacitors and a motor controller. Background technique [0002] Limited by material cost and material characteristics, the current temperature resistance of film capacitors can only reach 105°C, and the temperature resistance of other components of the motor controller can reach 125°C. Film capacitors have now become the shortest board to increase the power limit of motor controllers. Therefore, providing a good cooling environment for film capacitors is a technical exploration that has to be done now. [0003] Chinese patent CN2018206307163 discloses a film capacitor installation and heat dissipation structure, including a controller main housing, a film capacitor installation slot is provided at the bottom of the controller main housing, a film capacitor is placed in the film capacitor installation slot, ...

AI Technical Summary

Problems solved by technology

[0004] However, the arrangement of the above-mentioned structure is not convenient for the installation of the components of the motor controller, the installation speed is slow, and the working temperature of the film capacitor cannot be monitored; at the same time, due to the defects of the structural arrangement, the overall heat dissipation efficiency is not very ideal

Although the film capacitor used in the motor controller is custom-developed, it has a single function, and the input signal needs to be protected by an additional filter device, which increases the design difficulty of the motor controller, increases the manufacturing cost, and wastes a lot of the whole machine Effective application space

Without these filtering means and devices, the EMC protection level of the motor controller cannot pass the national inspection, and it cannot be sold

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