Circuit for the generation of two symmetrical buses of tension with respect to the negative of the feeding tension
Circuit for the generation of two symmetrical buses of tension with respect to the negative of the feeding tension, comprising supply means able to supply a power step-up circuit comprising an inductor, a switch, a diode and a condenser, an LC filter being arranged in cascade to said power step-up circuit, a pair of switches with relevant re-circulation diodes being connected in cascade to said LC filter, whose peculiar aspect is that said supply means comprise a single supply source, and a circuit branch consisting of a condenser and a diode connected in series the one to the other and in parallel to said switch and said condenser of said power step-up circuit, a further inductor with diode in series being connected between the anode end of said circuit branch diode and a condenser connected symmetrically with respect to the condenser of said power step-up circuit.
1. A circuit for the generation of two symmetrical buses of tension with respect to the negative of the feeding tension, comprising supply means able to supply a power step-up circuit comprising an inductor, a switch, a diode and a condenser, an LC filter being arranged in cascade to said power step-up circuit, a pair of switches with relevant re-circulation diodes being connected in cascade to said LC filter, wherein said supply means comprise a single supply source, and a circuit branch consisting of a condenser and a diode connected in series the one to the other and in parallel to said switch and said condenser of said power step-up circuit, a further inductor with diode in series being connected between the anode end of said circuit branch diode and a condenser connected symmetrically with respect to the condenser of said power step-up circuit.
2. The circuit according to claim 1 , wherein at the ends of said condenser of said power step-up circuit a positive power voltage is generated while at the ends of said condenser symmetric with respect to said step-up circuit condenser a negative power voltage is generated.
3. The circuit according to claim 2 , wherein the output voltage of said circuit is drawn at the ends of the condenser of said LC filter.
4. The circuit according to claim 3 , wherein said positive power voltage is that used for the positive half wave of said output voltage and said negative rower voltage is that used for the negative half wave of said output voltage.
5. The circuit according to claim 1 , wherein said single supply source is a direct supply source.
6. The Circuit according to claim 1 , wherein said power step-up means comprise a single power step-up circuit.
7. UPS comprising a circuit according to claim 1 .
8. UPS comprising a circuit according to claim 2 .
9. UPS comprising a circuit according to claim 3 .
10. UPS comprising a circuit according to claim 4 .
11. UPS comprising a circuit according to claim 5 .
12. UPS comprising a circuit according to claim 6 .