Automatic EMI Measurement by LabVIEW

• Main Authors: CHIH-FENG PENG, 彭垤鋒
• Other Authors: CHUNG-HSIUNG YEH
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/04463707695626246189

碩士 === 明新科技大學 === 電機工程研究所 === 98 === The EMI measurement software is designed usually by C language. We use Labview software to design the EMI measurement software and develop the EMI measurement platform. The automatic EMI measurement Program has the following function: the turntable position control, the antenna height position control, the parameter setting for spectrum analyzer, the limit line selection, and the calibration of the instrument. There are various kinds of the charger for the different cell-phone. We must change the charger when we change the cell-phone each time. The NCC (National Communication Commission) will unify the existing cell-phone charger diversified in specifications with the micro USB next year. The conducted emissions and radiated emissions were measured by our EMI measurement platform. The conducted emissions were not qualified for some chargers. The EMI filter is inserted in the circuit to improve the conducted emission.