FERRORESONANT-TYPE DC POWER-SUPPLY CONTROLLED BY FULLY MAGNETIC TECHNIQUE

As a method of compensating for the voltage drop on the de side of fer roresonant dc stabilized power supplies, a magnetic-only controlled po wer supply was developed. When a de magnetic field is applied in the d irection of diameter of a saturable ring core, using the saturation fl ux density, that is, resonant voltage change, by de load current feedb ack to an electromagnet positioned in the diametric direction, the res onant volt;ige is altered and output voltage stabilization is achieved . By increasing the operation frequency of the power supply, miniaturi zation is achieved and simultaneously, as a feedback control method, i s expressed in a block diagram. An investigation was made on the power supply design method and the response to various disturbances. As a r esult, design criteria were established to make the steady-state outpu t voltage error zero. The transient response simulation was verified t o explain well the experimental result.