| 摘要 |
PROBLEM TO BE SOLVED: To avoid the demerits such as the increase of cost, the lowering of efficiency and the increase of weight for the control circuits of plural power supplies by connecting a 1st capacitor between the 2nd output of a 1st power unit and the connection point of a 2nd resistance. SOLUTION: The 2nd output of a power unit 3, a capacitor 12 and a resistance 13 are added, and the voltage of the 2nd output is set at V2. Then the overshoot never occurs although a capacitor 10 is already charged by a power unit 4 since a series circuit of the capacitor 12 and the resistance 13 functions as the capacitor 10 and a resistance 11 respectively. The capacitor 12 is connected to the 2nd output of the unit 3 and accordingly not charged yet when the unit 3 is started. Then the capacitor 12 is charged when the unit 3 is started and the voltage V2 rises to function to prevent the overshoot thereby switches the voltage V1 smoothly. Thus, it is possible to prevent the overshoot just by adding a small number of parts. |
