System for suppressing conducted EMI and household appliance

Abstract

The embodiment of the invention discloses a system for suppressing conduction EMI and a household appliance. The system comprises a conduction EMI suppression circuit, an inductive load and a suppressed device, wherein the conduction EMI suppression circuit comprises an inductor and an RC circuit; the inductor, the inductive load and the suppressed device are connected in series. The inductor andthe suppressed device are connected in series and then are connected with the RC circuit in parallel. The suppressed device comprises at least two contacts, the conductive EMI suppression circuit is used for suppressing conductive EMI caused when the two contacts of the suppressed device are disconnected, and the suppressed device is used for controlling the working state of the inductive load. According to the system for suppressing the conducted EMI and the household appliance provided by the embodiment of the invention, the filtering effect of the conducted EMI of the suppressed device is improved, and the cost of passing a conducted EMI test is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of household appliances, and in particular to a system for suppressing conducted EMI and household appliances. Background technique [0002] Electromagnetic Interference (EMI for short) refers to the damage caused by unwanted signals or noise to the reception or transmission of useful electromagnetic signals. EMI generated by electronic / electrical equipment is transmitted through wires or public power lines, and EMI transmitted in wires or public power lines can be called conducted EMI. The conducted EMI of electronic / electrical equipment can be measured through the Line Impedance Stabilization Network (LISN for short). At present, electronic / electrical equipment needs to pass relevant conducted EMI tests before being put on the market. [0003] For electronic / electrical equipment using electronic devices such as timers and relays, when the electrical equipment connected to electronic ...

AI Technical Summary

Problems solved by technology

In practical applications, due to the extremely high conductivity and low internal resistance when the contacts generate spark discharge, the insertion loss of the RC circuit is not high. It is also necessary to add a filter board at the power port to pass the conducted EMI test, which improves the Cost of Conducted EMI Testing

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