Horology: time measuring systems or devices – Power supply details – Electrical
Patent
1998-02-09
2000-11-28
Miska, Vit
Horology: time measuring systems or devices
Power supply details
Electrical
320166, 323222, 323282, 363 89, 363127, G04B 100, G04C 300, H02N 7217, G05F 140
Patent
active
061544221
ABSTRACT:
A power-generating device can include a dynamo for converting kinetic energy into electrical energy, a switch capable of short-circuiting output terminals of the dynamo, a controller capable of controlling the switch, a rectifier for rectifying an output of the dynamo, and a charging portion capable of storing the output of the dynamo. The controller can perform chopper control for cyclically turning on and off the switch in accordance with a PWM signal. Where an electromotive voltage of the dynamo is lower than a charged voltage, a boosted voltage can be produced by chopper amplification. If the electromotive voltage is low, it can be charged in the charging portion if the boosted voltage is increased to a sufficient level prior to charging.
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Fujisawa Teruhiko
Shinkawa Osamu
Uetake Akihito
Miska Vit
Seiko Epson Corporation
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