| 摘要 |
PROBLEM TO BE SOLVED: To cancel a reverse current generated by the counter electromotive force of load without raising manufacturing cost. SOLUTION: When breaking the current conduction to first load, the state of current conduction to second load 2 is judged (S1), and if a current is applied to the second load (S1, YES), and the current conduction to the first load is broken (S5) as it is, and unless a current is applied to the second load, the current conduction to the first load is broken (S3) after current conduction (S2) to the second load. |
