| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary side power receiving circuit capable of reducing energy loss. SOLUTION: This power receiving circuit is provided with a coil 7 for current limiting, whose one terminal is connected with the positive output end of a rectifier circuit 4, a transistor 10 for output adjustment which is connected between the other terminal of the coil 7 and the negative output end of the rectifier circuit 4, and is turned on when an output voltage exceeds a reference voltage, and a second transistor 21 connected between the positive output end of the rectifier circuit 4 and the negative output end. In order to make an output voltage VDC of a constant voltage control circuit 5' constant, when the transistor 10 for output adjustment is turned on, the second transistor 21 is turned on after a specified time, and the transistor 10 is turned off. With this constitution, energy loss which has been generated in conventional systems when the constant voltage control circuit 5' maintains an output voltage to be constant can be reduced, and energy saving is achieved as facilities. |
