发明名称 |
ELECTRONIC WATTHOUR METER |
摘要 |
PURPOSE:To enable the minimizing of a voltage drop of a power source for backup even when a power failure occurs while a periodical discharge of a lithium battery is performed. CONSTITUTION:A power failure detection circuit comprising a comparator 14 and a power failure compensation circuit comprising a microcomputer 12 and an AND circuit 15 are arranged and a power source 6 for backup is discharged periodically in a normal operation based on an output of the power failure detection circuit. During a power failure, the periodical discharging of the backup power source 6 is stopped with the power failure compensation circuit. Thus, there is no duplication of the power failure and the periodical discharge thereby enabling the checking of a voltage drop to the minimum. |
申请公布号 |
JPH0534386(A) |
申请公布日期 |
1993.02.09 |
申请号 |
JP19910194069 |
申请日期 |
1991.08.02 |
申请人 |
MITSUBISHI ELECTRIC CORP;TOKYO ELECTRIC POWER CO INC:THE |
发明人 |
NAKADA SEIICHI;YOSHINAGA TORU;IKEDA OSAMU |
分类号 |
G01R22/00;H02J7/00;H02J9/00 |
主分类号 |
G01R22/00 |
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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