| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a current detector capable of accurately detecting current without cutting a bus bar. <P>SOLUTION: In a current detector 10 comprising a bus bar 11 including a battery terminal 11T and a stud bolt St, and a printed circuit board 12P mounted in a flat part 11F in the bus bar 11, and determining current flowing in the bus bar 11 from voltage drop in the bus bar 11 and a known resistance value by the printed circuit board 12P, an amplifier circuit, a bus bar temperature detection circuit and a microcomputer are mounted on the printed circuit board 12P, the voltage drop in the bus bar 11 is inputted into the amplifier circuit to be amplified with a prescribed amplification factor, the bus bar temperature detection circuit detects the temperature of the bus bar 11 when detecting the voltage drop and inputs the temperature into the microcomputer, the microcomputer calculates a correction value of the amplification factor in relation to the inputted detection temperature and transmits the correction value to the amplifier circuit, and the amplifier circuit corrects the amplification factor based on the correction value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
