| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a feeding system having less energy loss for a DC/DC converter. SOLUTION: A sub-battery 2 is connected with a main battery 1 via a DC/DC converter 31. An output current determining part 33 compares the output current of the DC/DC converter detected with an ampere meter 32 with a first given value to output the result of the comparison as a control signal. A voltmeter 34 for detecting a terminal voltage is provided on the sub-battery 2. A charge control device 35 compares the detected value of the voltmeter 34 with a second given value to output the result of the comparison as another control signal. An output control device 37 inputs the control signals via an OR circuit. If the terminal voltage of the sub-battery 2 is equal to or lower than the second given value, the DC/DC converter 31 is controlled in such a way as to output a current. If the output current of the DC/DC converter has become equal to or lower than the first given value, the current is shut off. This prevents the DC/DC converter from being operated with an inefficient low output current, thereby reducing energy loss.</p> |
