Bi-directional electric power conversion circuit with bridgeless buck-boost circuit and reconfigurable capacitor-inductor filter circuit

An electric power conversion circuit, comprising:

• a direct current (DC) voltage connection interface providing a positive DC port and a negative DC port;
• an alternating current (AC) voltage connection interface providing a positive AC port and a negative AC port;
• a first series connection having a first diode (D1) with a first inductor (L1), connected in parallel with the positive DC port and negative DC port of the DC voltage connection;
• a second series connection having a second diode (D2) with a second inductor (L2), connected in parallel with the positive DC port and negative DC port of the DC voltage connection;
• a first switch (S3) having a first end connected to a point along the first series connection between the first diode (D1) and the first inductor (L1), and having a second end connected to the positive AC port of the AC voltage connection;
• a second switch (S4) having a first end connected to a point along the second series connection between the second diode (D2) and the second inductor (L2);
• and
• a reconfigurable capacitor-inductor (CL) filter circuit configured to connect one or more switching capacitors (CAB;
• CA, CB) between the AC ports and the DC ports.