Electromagnetic Disturbance Suppression Of Inverter Air Condition

With the popularization and development of numerical controlled circuit, electromaganetic radiation of electronic equipment not only disturbs normal work of other electronic equipment, but also influence people's health and safety. Electromaganetic disturbance is a serious invisible pollution, so suppressing electromaganetic disturbance of electronic equipment in the electronic industries is urgent.As a new technology of inverter air conditioner with high power compoent, it has serious electromaganetic disturbance. Comparing inverter air conditioner with other household appliance, inverter air conditioner has more complex electronic circuit and control mode. If we haves no better means to solve the electromanetic disturbance of inverter air conditioner, it will affects the health of inverter industray and impact the market position of inverter equipment in the international maket. So the paper formulates the analysis and surpression means of electromaganetic disturbance of inverter air conditioner in whole system of air conditioner.In the first place, development course of electronic control circuit and control circuit specialty is generalized in the paper. At the same time, the significance of research is definituded. In the second chapter, from the point of view of electronmaganetic disturbance and immunity, EMC test standards and claim are used in inverter air conditioner at present. In the third chapter, primary module circuit and electromaganetic disturbance source, characteristic of power factor correction module and its primary harmonic source-bridge rectification circuit with capacitor is expatiated in the paper. Hardcore IPM module in the inverter air conditioner and characteristic electromaganetic disturbance of switch-power in the control board is explained in the paper.Against characteristic of inverter air conditioner, the emphase of filter circuit in inverter air conditioner is expatiated in the fourth chaper with filter theory in the electromaganetic field. It is a direction for the use of filter circuit in the inverter air conditioner. Through the analysis and calculation, filter circuit of switch-power and IPM module filter circuit and outside filter is designed respectively. By systematism analysis of inverter air conditioner in global and local, EMC test problem and disturbance is solved and approved. The paper is the guidelines for the converter air conditioner or others converter household appliance through the EMC test.