Electromagnetic compatible filter network and filter network module

Abstract

The filter network and module of filter network are setup between power input end and rectification circuit. The filter network includes seven capacitors; internal connecting ends of capacitors are connected to each other, and external connecting ends of capacitors constitute passive linear network in seven ends. An external connecting end of one capacitor is connected to ground of power source. Other six capacitors are paired to three groups, and parameters in each capacitor group are identical. External connecting ends of first group as input ends are connected to two input ends of power source. External connecting ends of second group as middle ends are connected to two input ends of rectification circuit. External connecting ends of third group as output ends are connected to two output ends of rectification circuit. The module is encapsulated as thick film IC with nine pins. Features are simple, compact, stable for solving electromagnetic interference.

Description

technical field [0001] The invention relates to a frequency-selective multi-terminal pair impedance network using only passive electrical components as network components, in particular to an electromagnetic compatibility filter network and a filter network module. Background technique [0002] National standards related to electromagnetic compatibility EMC, most of which are equivalent to international standards, for most information technology products, electrical products with AC motors or permanent magnet DC motors, especially when using converters and inverters at the same time Electromagnetic compatibility problems such as electromagnetic interference, electromagnetic field and radio frequency interference, which are common in electrical products of electrical appliances, have set strict restrictions. The purpose is to prevent electromagnetic energy from entering or being emitted by electrical products, and to ensure normal operation operation, to avoid vicious acciden...

AI Technical Summary

Problems solved by technology

However, due to the different network structures, the suppression effects on differential mode interference and common mode interference are different, and they all need to be further improved.

As for the EMC filter network used in electronic ballasts, it is also restricted by the five requirements of low cost, small size, difficult process, high reliability and wide compatibility. At present, there is no one that can meet the above five requirements at the same time. Practical electromagnetic compatibility filter network required

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