| 摘要 |
A POWER SOURCE APPARATUS ACCORDING TO THE PRESENT INVENTION IS ONE IN WHICH AN EXCITING CURRENT OF A PRIMARY SIDE WINDING (5) OF AN INSULATING CONVERTER TRANSFORMER (5) IS SWITCHED BY A SWITCHING ELEMENT (4) AND AN OSCILLATION STATE OF AN OSCILLATING DRIVE CIRCUIT (16,17) CONNECTED TO THE SWITCHING ELEMENT (4) IS CONTROLLED ACCORDING TO A SECONDARY SIDE OUTPUT VOLTAGE OF THE INSULATING CONVERTER TRANSFORMER (5) FOR CONTROLLING THE SECONDARY SIDE OUTPUT VOLTAGE TO BE CONSTANT VOLTAGE. UNDER THE CONTROL OF THE OSCILLATING DRIVE CIRCUIT (16,17), A SUPPLYING PATH OF THE EXCITING CURRENT IS CHANGED OVER BETWEEN TWO MODES OF A FULL BRIDGE ACTION AND A SINGLE ENDED PUSH-PULL AND HALF BRIDGE ACTION.
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