| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power supply system that can substantially constantly maintain a voltage applied to a load device irrespective of normal time and power failure time and can stably operate the load device while suppressing an influence on an increase in size of a circuit and an increase in costs.SOLUTION: A power supply system comprises: a first power conversion section 3 that converts output of a rectifier circuit 2 into a first predetermined voltage Va and supplies DC power to a DC common section 13; a second power conversion section 4 for converting the output of the rectifier circuit 2 into a second predetermined voltage Vb smaller than the first predetermined voltage Va; and a power storage section 5 charged by the second predetermined voltage Vb. In a configuration in which the power storage section 5 is charged at normal time, and the DC power is supplied from the power storage section 5 via a diode 6 to the DC common section 13 and the DC power is supplied from the DC common section 13 to a load 8 at power failure time, the power supply system is configured so as to comprise a voltage depression section 14 for depressing a voltage applied to the load 8 at the normal time at a subsequent stage of the DC common section 13 and causes the voltage applied to the load 8 at the normal time to substantially coincide with the voltage applied thereto at the power failure time. |
