Bidirectional high voltage gain DC-DC power converter with automatic current sharing function

A high voltage gain DC-DC bidirectional power converter with an automatic current sharing function, suitable for bidirectional power supply between a first voltage source and a second voltage source, the high voltage gain DC-DC bidirectional power converter comprising:

• a first switching circuit including:
• a first high-side switch, a second high-side switch, and a first low-side switch connected in series between a first end and a second end of the first voltage source;
• a first clamping capacitor and a second low-side switch connected in series between the first high-side switch and the second end of the first voltage source;
• and
• a first inductor having a first end connected between the second high-side switch and the first low-side switch, and a second end connected between the first clamping capacitor and the second low-side switch;
• a second switching circuit including:
• a second inductor and a third high-side switch connected in series between a first end of the second voltage source and the first switching circuit;
• and
• a third low-side switch having a first end connected between the second inductor and the third high-side switch, and a second end connected to a second end of the second voltage source;
• a third switching circuit including:
• a third inductor, a second clamping capacitor, and a fourth high-side switch connected in series between the first end of the second voltage source and the first switching circuit, wherein the fourth high-side switch is further connected between the second switching circuit and the first switching circuit;
• and
• a fourth low-side switch having a first end connected between the third inductor and the second clamping capacitor, and a second end connected to the second end of the second voltage source;
• and
• a control circuit configured to correspondingly control the first switching circuit, the second switching circuit, and the third switching circuit through a first switch signal, a second switch signal, a third switch signal, and a fourth switch signal,
• wherein the first high-side switch and the third high-side switch correspond to the first switch signal, the second high-side switch and the fourth high-side switch correspond to the second switch signal, the second low-side switch and the third low-side switch correspond to the third switch signal, the first low-side switch and the fourth low-side switch correspond to the fourth switch signal, the first switch signal and the second switch signal differ by a predetermined phase, the first switch signal and the second switch signal are complementary, and the second switch signal and the fourth switch signal are complementary.