High frequency energy saving DC to DC power converter

A current fed inverter circuit packaged in a module, said module comprising:

• a current fed inverter including a first leg having a first (S1) and second (S3) series connected switches and a second leg in parallel with the first leg having a third (S2) and a fourth (S4) series connected switches;
• a first diode (D1), a second diode (D2), and a fifth switch (S5) connected between Said first and second diodes, said first diode, said fifth switch, and said second diode connected in series, and the series combination being connected in parallel with said first and second legs of the inverter;
• and
• a capacitor (C1), wherein the first diode and the capacitor are series connected, and the series combination connected in parallel with said first and second legs of the inverter, said diode (D1) poled to provide current to said capacitor at the beginning of each inverter switching cycle.

A high frequency current fed power converter circuit, comprising:

• a buck regulator coupled to an energy source and having a buck switch (S6), a free wheeling diode (DFW) and a buck inductor (L1);
• a nonregulated current controlled inverter circuit including a first leg having a first (S1) and a second (S3) series connected switches and a second leg in parallel with the first leg having a third (S2) and a fourth (S4) series connected switches, a series connected first diode (D1) and a capacitor (C1), the series combination connected in parallel with said first and second legs, said diode (D1) poled to provide current to said capacitor at the beginning of each inverter switching cycle, a second inductor (L3) and a second diode (D2), said second diode poled to permit circulating current in said second inductor, and a fifth switch (S5), the second diode and fifth switch being connected such that the discharging of the capacitor through the fifth switch provides the circulating current in said second inductor, and when the fifth switch reopens, the energy stored in the recirculating inductor is passed to the inverter;
• and
• an output device comprising a transformer and a rectifier circuit for providing a DC output;
• said buck regulator feeding the nonregulated current controlled inverter circuit, said nonregulated inverter circuit coupled between said buck regulator and the output device.