To provide a power circuit for wheel loaded electrical equipment capable of stably functioning the electrical equipment even when electric power from an electric wave is weak without causing extensive cost increase.
This power circuit 10 for the wheel loaded electrical equipment is furnished with a receiving antenna 1 to receive the electric wave as alternating current electric power, a rectifier 2 to covert this alternating current electric power to a direct current, an electric charger 3 to store the rectified electric power and a switch 11 to connect and disconnect supply of the stored electric power to the electrical equipment 13. This switch 11 is constituted to transfer to the cut-out state from an electrified state when voltage Vx immediately before the switch is lower than first voltage V1 higher than the lowest working voltage of the electrical equipment 13 and to transfer to the electrified state from the cut-out state when the voltage immediately before the switch is higher than second voltage V2 which is higher than the first voltage V1.
TOYOFUKU MASANORI
| JP2005038037A | 2005-02-10 | |||
| JP2005029002A | 2005-02-03 | |||
| JPS63501065A | 1988-04-21 | |||
| JP2004268632A | 2004-09-30 | |||
| JP2005161944A | 2005-06-23 |
| WO1993011509A1 | 1993-06-10 |
Hiroshi Tokunaga
Yoshiyuki Iwasa
Shiro Fujitani
Kiyoshi Kuruma
Kazuyuki Tomita