초록 ▼

D.C. power supply having a reactive buck automatic D.C. voltage regulator which directly controls the rectified D.C. output of a loosely coupled transformer thereby providing load regulation from an unregulated alternating current source. The load current passes through the secondary winding of an a

D.C. power supply having a reactive buck automatic D.C. voltage regulator which directly controls the rectified D.C. output of a loosely coupled transformer thereby providing load regulation from an unregulated alternating current source. The load current passes through the secondary winding of an auxiliary buck transformer and is stepped down to a much lower value in the primary winding of the auxiliary buck transformer. The primary winding of the auxiliary buck transformer is coupled to an isolated winding on the core of a ferroresonant C.V.T. transformer which receives the unregulated alternating current input signal, and the coupling between the isolated winding and the primary winding of the buck transformer effects a bilateral energy transfer between the two transformers which effects a real time reactive compensation which regulates the D.C. output of the power supply for changes in the input voltage and in the load while conserving the energy which would normally be wasted in achieving regulation by transferring it back to the resonant circuit via the bilateral energy transfer between the two transformers. The control system is set up so that the auxiliary buck transformer is normally bucking under all line and load conditions when the frequency is precisely at the resonant frequency of the saturable inductor and capacitor. A frequency shift either above or below resonance simply changes the amount of bucking that takes place in a complimentary manner. It should be noted that little power is consumed during the buck process as the power is returned from the auxiliary buck transformer to the loosely coupled ferroresonant transformer. The operating point of a negative feedback system which determines the point about which the bilateral energy transfer occurs, may be fine-tuned by an error-sensing feedback circuit for altering the voltage level which the coupling network operates to hold constant by controlling the bilateral energy transfer. A capacitor is provided across the primary of the auxiliary buck transformer to reflect capacitance into the secondary winding during conditions of little or no bucking action in order to enhance the stability of the regulator.

대표청구항 ▼

A high-efficiency regulated power supply comprising: ferroresonant transformer means for transforming an alternating current input signal, said ferroresonant transformer means including a core means, a primary input coil means coupled about said core means for receiving said alternating current inpu

A high-efficiency regulated power supply comprising: ferroresonant transformer means for transforming an alternating current input signal, said ferroresonant transformer means including a core means, a primary input coil means coupled about said core means for receiving said alternating current input signal, a secondary coil means coupled about said core means and responsive to the alternating current input signal received by said primary coil means for generating a tranSformed secondary signal, a third coil means coupled about said core means and including a capacitor means connected in parallel across said coil means and tuned with said third coil means near the input frequency of said alternating current input signal for establishing ferroresonant and a centrally tapped winding within said secondary coil means having a central tap lead coupled to ground with one end of said centrally tapped secondary winding being serially connected to a first buck transformer secondary winding means and the other end of said centrally tapped secondary winding being serially coupled to a second buck transformer secondary coil means; output means coupled to said secondary coil means for receiving said transformed secondary signal and outputting a regulated DC output signal, said output means including compensation means for varying said transformed secondary signal to ensure that said regulated DC output signal remains constant, said compensation means includes an auxiliary buck transformer means having a buck transformer secondary winding means connected in series with said secondary coil means for controllably bucking said transformed secondary signal and a buck transformery primary control winding means for controlling the amount of buck produced by said buck transformer secondary winding means, and said output means further includes an LC filter network for producing a DC output signal and rectifying diode means for coupling said buck transformery secondary winding means to said output filter means; and reactive control means responsive to real time changes in the alternating current input signal, in the parameters of the power supply itself, and in the load for simultaneously and reactively controlling said compensating means, said alternating current input signal and said transformed secondary signal for ensuring that said regulated DC output signal remains constant while minimizing power losses within said power supply.