| 摘要 |
PURPOSE:To improve the constant voltage characteristic of a switching regulator for feeding back the variation in the magnetic flux of a main transformer constantly by inserting an inductance having specific DC superposing characteristic between the secondary winding and a rectifier. CONSTITUTION:The input DC voltage is interrupted by a switching element 2 connected in series with the primary winding 1a of a main transformer 1, the voltage of a control winding 1c is fed back to a pulse width controller 3, self- excitedly switched, and controlled at constant voltage. An inductance element 11 is connected in series between one end of the secondary winding 1b and a rectifier 9, and connected at the DC voltage unit of the output through a series circuit of another rectifier 17 and a reisistor 18. The element 11 which has DC magnetomotive force of 1.0AT or higher, and attenuating characteristic of simple of the inductance of high frequency to the DC current is used. |
