Efficient filtering device for motor controller

Abstract

The invention relates to an efficient filtering device for a motor controller. The efficient filtering device comprises a support, and first filters, a second filter, a third filter and a fourth filter which are connected in sequence. First grounding copper sheets are respectively fixed in two fourth grooves, a positive copper plate and a negative copper plate are fixed in second grooves, and the positive copper plate and the negative copper plate are respectively connected with the first filters, the third filter and the fourth filter. The second filter is arranged in a third groove and is encapsulated by silica gel. The two first filters are fixed in two first grooves, and the grounding pins of the first filters are connected with the first grounding copper sheets. The third filter is integrated in the fourth filter, and the input end of the fourth filter penetrates through the third groove to be electrically connected with the positive electrode copper plate and the negative electrode copper plate. Compared with the prior art, as a modular design is adopted, the structure is compact, the filtering effect is good, the EMC performance is excellent, the automation degree is high, and the device is suitable for being used when the requirement for the EMC performance of the whole vehicle is high.

Description

technical field [0001] The invention relates to the field of motor controllers, in particular to a high-efficiency filter device for a motor controller. Background technique [0002] With the continuous development of electric vehicles, more and more OEMs have begun to pay attention to the problem of electromagnetic interference in vehicles. Electric vehicles mainly rely on one (or more) electric drive systems to provide traction. The motor drive system mainly includes power batteries, motor controllers, motors, high-voltage cables and connectors. Studies have shown that the main source of interference in the entire electric drive system is the motor controller. Because the power module in its working process will generate transient voltage and current, the rapidly changing voltage or current will form an interference source through parasitic capacitance and parasitic inductance. , which will generate a large electromagnetic disturbance, which will not only affect the drivi...

AI Technical Summary

Problems solved by technology

At present, the internal design of the motor controller generally only designs two filters, the film capacitor and the Y capacitor. Due to the high voltage and high current in the entire electric drive system, the motor controller will have obvious electromagnetic interference. If it is not well designed and control, it will inevitably lead to the stability and reliability of the vehicle controller being affected, and it is difficult to meet the needs of the vehicle

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