| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the number of parts and improve power efficiency in a battery backup DC stabilized power supply. SOLUTION: This battery backup DC stabilized power supply consists of a transformer 10 having a plurality of primary windings, a first switching means 13 connected to a first primary winding 10a, a main power supply means 11, a second switching means 22 connected to a second primary winding 10b, a battery 21 for supplying power to the second primary winding 10b, a reverse- flow preventing means 23, an output circuit 31 for converting AC power developed at as secondary winding 10c into DC power, and a control means 70, which generates a control signal for periodically switching a first switching means 13 and a second switching means 22 and which reflects the condition of the voltage or current outputted form the output circuit 31.</p> |
