发明名称 |
ABNORMALITY DETECTOR AND DETECTING METHOD OF ALTERNATOR |
摘要 |
<p><P>PROBLEM TO BE SOLVED: To find the abnormality of an alternator for vehicle in early stage and informs it to a driver before such an event as deterioration of a battery or engine shutdown incident to lowering of power generation occurs. <P>SOLUTION: Output voltage of an alternator 103 is inputted from an analog terminal 207 and filtered by means of a processor 201 in a specified frequency band. Difference between the maximum value and minimum value of the filtered output voltage of the alternator is calculated and a decision is made that the alternator is abnormal if that difference is equal to or higher than a threshold value. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
申请公布号 |
JP2005102436(A) |
申请公布日期 |
2005.04.14 |
申请号 |
JP20030334548 |
申请日期 |
2003.09.26 |
申请人 |
HITACHI LTD |
发明人 |
SHIMURA AKITOSHI;UENO TETSUO;KANO KOJI;AIZONO TAKEO |
分类号 |
H02J7/14;H02P9/30;(IPC1-7):H02P9/30 |
主分类号 |
H02J7/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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