Frequency-sweep experimental method for predicting noise of power capacitor

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United States of America Patent

PATENT NO 10260936
APP PUB NO 20160349106A1
SERIAL NO

15033902

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Abstract

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A frequency-sweep experimental method for predicting noise of a power capacitor, comprises steps of: (1) loading the capacitor with a sine voltage excitation with a loading frequency value of ½ to 50 times of a power frequency in sequence, at an increase of half of the power frequency for each time, and measuring vibration velocity at various points on a case of the capacitor; (2) under each loading frequency, dividing vibration velocity by a square of each voltage applied; (3) calculating frequency spectrum of a square of the voltage of the capacitor according to the voltage and a current of the capacitor; (4) multiplying the frequency spectrum of the square of the voltage of the capacitor by the electromechanical vibration frequency response function value of the capacitor to obtain a vibration velocity spectrum of the case of the capacitor; (5) calculating acoustical power of the noise.

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Patent Owner(s)

  • XI'AN JIAOTONG UNIVERSITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Cui, Yanjie Shaanxi, CN 15 129
Ji, Shengchang Shaanxi, CN 3 0
Li, Jinyu Shaanxi, CN 112 1847
Song, Ying Shaanxi, CN 36 150
Zhu, Lingyu Shaanxi, CN 14 80

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