| 摘要 |
PROBLEM TO BE SOLVED: To drive a plurality of electric motors with a power supply having small capacity by turning on the power of other electric motors during the period, prior to a current that is detected, when at least one electric motor out of the plurality of electric motors turned on passes over, a peak and reaches nearly zero. SOLUTION: This device includes a plurality of electric motors 91-9n and a control part 2, and the plurality of electric motors 91-9n are driven by a common power supply 1. Then, the control part 2 detects a current flowing through the electric motors, when the power supply 1 of at least one electric motor out of the plurality of electric motors 91-9n is turned and turns on the power supply 1 of other electric motors within a period before a current, which flows through the electric motors whose power supply 1 is turned on, reaches nearly zero after passing a peak. Also, the control part 2 receives a current io from the power supply 1, and a current i1 flows from the control part 2 to the electric motor 91 when the power supply 1 of the electric motor 91 is turned on. The applies similarly to other electric motors 92-9n, so that driving of the plurality of electric motors can be made with a small current capacity.
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