Convertitore DC-DC

It is disclosed a direct-direct voltage converter comprising a rectifier (5; DS1, DS2, DS3, DS4) adapted to generate a first level of direct voltage (∆HV), a transformer (10) comprising a primary winding (10.1) connected to the rectifier and comprising a secondary winding (10.2), a resonance inducto...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FORTE, Pasquale, SILVESTRI, Giovanni
Format:	Patent
Sprache:	ita
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	It is disclosed a direct-direct voltage converter comprising a rectifier (5; DS1, DS2, DS3, DS4) adapted to generate a first level of direct voltage (∆HV), a transformer (10) comprising a primary winding (10.1) connected to the rectifier and comprising a secondary winding (10.2), a resonance inductor (L_res) interposed between the rectifier and the primary winding (10.1). The DC-DC converter further comprises a first (S5) and a second (S6) switch connected together in series, comprises a first inductor (L1) having a first terminal connected to a first terminal of the secondary winding, comprises a second inductor (L2) having a first terminal connected to a second terminal of the secondary winding and having a second terminal connected to a second terminal of the first inductor, comprises a freewheel diode (D3) having a cathode terminal connected to the second terminal of the first inductor (L1) and having an anode terminal connected to a common node between the first and the second switch, in which the anode terminal of the freewheel diode is adapted to receive a lower value (LV-) of a second level of direct voltage (∆LV). The DC-DC converter further comprises a limiting switch (S10) having a first terminal (I) connected to the second terminal of the first and second inductors and further connected to the cathode terminal of the freewheel diode (D3), having a second terminal (O) adapted to receive a higher value (LV+) of the second level of direct voltage and having a control terminal (C) adapted to receive a third signal (S_sf) for controlling the opening and closing of the limiting switch. The electronic driving device (30) is adapted to generate the first (SINC2), second (SINC1) and third (S_sf) control signals. The DC-DC converter being configured to operate in a first operating mode (t50, t62; ∆Tl) in which the input is the second voltage level and the output is the first voltage level. The freewheel diode is configured to operate in forward biasing (t50, t52, t56, t58), when the limiting switch (S10) is in an opening position, and it is configured to operate in reverse biasing (t54, t60), when the limiting switch (S10) is in a closing position.