发明授权
- 专利标题： Alternator testing method and system using ripple detection
- 专利标题（中）： 交流发电机测试方法和使用纹波检测的系统
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申请号： US09888385申请日： 2001-06-26
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公开(公告)号： US06806727B2公开(公告)日： 2004-10-19
- 发明人: Dennis G. Thibedeau , Richard J. Faehnrich , Alejandro P. Brott , Alan D. Goetzelmann , Paul A. Willems
- 申请人： Dennis G. Thibedeau , Richard J. Faehnrich , Alejandro P. Brott , Alan D. Goetzelmann , Paul A. Willems
- 主分类号： G01R3134
- IPC分类号： G01R3134
摘要：
A method and system for evaluating the operation of an alternator based on a frequency component in the alternator output signal. The method detects a frequency component of the alternator output signal, and compares the frequency component of the alternator output signal with a threshold frequency. The operation of the alternator is evaluated based on a result of the comparison. If the frequency component of the alternator output signal is lower than the threshold frequency, the alternator is determined as defective. The frequency component can be obtained by comparing the alternator output signal with an adaptive threshold. The adaptive threshold is generated based on the peak signal level and the valley signal level of the alternator output signal, such as the average of the peak signal level and valley signal level.