| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply in which duration can be prolonged utilizing energy stored in a spring, or the like, effectively at low cost. SOLUTION: A power supply comprises a generator 20 being rotated with the driving force of a spring 1a transmitted through speed increase gear train 7-11, a capacitor 36 being charged with power from the generator 20, and a chopper control circuit 180 for controlling the rotational speed of the generator 20 by braking the generator 20 through chopping based on the supply voltage from the capacitor 36. Since releasing speed of the spring, or the like, can be suppressed by applying brake while ensuring a required supply voltage, duration can be prolonged through effective utilization of energy stored in the spring, or the like.</p> |
