发明名称 |
LIFE PREDICTION DEVICE, POWER SUPPLY DEVICE, AND THE LIFE PREDICTION METHOD |
摘要 |
PROBLEM TO BE SOLVED: To accurately predict the life of a capacitor in a relatively early stage. SOLUTION: A reference resistor R22 is serially electrically connected to a smoothing capacitor C11 (capacitor). A voltage generating part 222 (voltage generating circuit measuring device) generates a biased A.C. voltage to be impressed on a serial circuit of the smoothing capacitor C11 and the reference resistor R22. A voltage measuring part 223 measures a voltage across the smoothing capacitor C11. A resistance computation part 224 (measuring device) computes an equivalent series resistance R of the smoothing capacitor C11 on the basis of the voltage across the smoothing capacitor C11 measured by the voltage measuring part 223. A life computation part 242 (life computation device) determines the life of the smoothing capacitor C11 on the basis of the equivalent series resistance R computed by the resistance computation part 224. COPYRIGHT: (C)2011,JPO&INPIT |
申请公布号 |
JP2010286426(A) |
申请公布日期 |
2010.12.24 |
申请号 |
JP20090141917 |
申请日期 |
2009.06.15 |
申请人 |
MITSUBISHI ELECTRIC CORP |
发明人 |
ISHIKAWA HIROAKI |
分类号 |
G01R31/00;G01R27/02;H02M1/00 |
主分类号 |
G01R31/00 |
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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