Abstract: A device for compensating ripples in the output voltage of a PFC converter and a battery charging device for an electric vehicle are disclosed. The disclosed device for compensating the ripples included in the output voltage of a PFC converter includes: a first switching element having one end connected with an output terminal that is not connected with a ground from among two output terminals forming an output end of the PFC converter; a second switching element having one end connected with the other end of the first switching element and having the other end connected with a ground; a compensation inductor having one end connected with the other end of the first switching element and with one end of the second switching element; and a compensation capacitor having one end connected with the other end of the compensation inductor and having the other end connected with a ground.

Abstract: An electric vehicle battery charging device includes: a series resonance part, which receives a rectified voltage, and which includes a transformer, a resonant inductor, and a resonant capacitor; a rectifying part, of which a first input end is connected with one end of a secondary winding of the transformer, a second input end is connected with the other end of the secondary winding of the transformer, and an output end is connected with an electric vehicle battery; and a switching part, of which one end is connected with one end of the secondary winding of the transformer and the first input end of the rectifying part, and the other end is connected with the other end of the secondary winding of the transformer and the second input end of the rectifying part, where the switching part controls the current from the secondary winding of the transformer to the rectifying part.

Abstract: A device for compensating ripples in the output voltage of a PFC converter and a battery charging device for an electric vehicle are disclosed. The disclosed device for compensating the ripples included in the output voltage of a PFC converter includes: a first switching element having one end connected with an output terminal that is not connected with a ground from among two output terminals forming an output end of the PFC converter; a second switching element having one end connected with the other end of the first switching element and having the other end connected with a ground; a compensation inductor having one end connected with the other end of the first switching element and with one end of the second switching element; and a compensation capacitor having one end connected with the other end of the compensation inductor and having the other end connected with a ground.

Abstract: An electric vehicle battery charging device includes: a series resonance part, which receives a rectified voltage, and which includes a transformer, a resonant inductor, and a resonant capacitor; a rectifying part, of which a first input end is connected with one end of a secondary winding of the transformer, a second input end is connected with the other end of the secondary winding of the transformer, and an output end is connected with an electric vehicle battery; and a switching part, of which one end is connected with one end of the secondary winding of the transformer and the first input end of the rectifying part, and the other end is connected with the other end of the secondary winding of the transformer and the second input end of the rectifying part, where the switching part controls the current from the secondary winding of the transformer to the rectifying part.