| 摘要 |
PURPOSE:To improve the constant voltage characteristic in a self-excited switching regulator for feeding back the variation in the magnetic flux of a main transformer by connecting a parallel circuit of a rectifier and a condenser through an inductance having specific DC superposing characteristics to the secondary winding. CONSTITUTION:An input DC voltage is interrupted by a switching element 2 connected in series with the primary winding 1a of main transformer, the voltage of a control winding 1c is fed back to a pulse width controller 3, and switched in self-excitation, thereby controlling to produce the constant voltage. An inductance element 11 is connected in series between one end of the secondary winding 1b and a rectifier 9, connected at the output DC voltage unit through a series circuit of another rectifier and a resistor 18, and a capacitive element 12 is connected in parallel with the input of the rectifier 9. The element 11 which has a DC magnetomotive force of 1.0AT or higher and simple attenuating characteristic of high frequency inductance to the DC current is used. |
