Abstract: A short circuit protection apparatus for a power conversion apparatus supplying power to a load via a plurality of switches connected to each other in parallel includes Ma current detectors each configured to detect a sum of currents flowing through two or more switches among the plurality of switches so as to output a detection signal indicative of the sum that is detected, wherein Ma is 1 less than M, which is the number of the plurality of switches, and a short circuit determiner configured to determine, based on detection signals obtained from the respective Ma current detectors, occurrence of short circuit failure in the plurality of switches to output a cutoff instruction signal for stopping on-off drive of the plurality of switches.

Abstract: A short circuit protection apparatus for a power conversion apparatus supplying power to a load via a plurality of switches connected to each other in parallel includes Ma current detectors each configured to detect a sum of currents flowing through two or more switches among the plurality of switches so as to output a detection signal indicative of the sum that is detected, wherein Ma is 1 less than M, which is the number of the plurality of switches, and a short circuit determiner configured to determine, based on detection signals obtained from the respective Ma current detectors, occurrence of short circuit failure in the plurality of switches to output a cutoff instruction signal for stopping on-off drive of the plurality of switches.

Abstract: An electric power converter includes a chopper circuit, a DC-DC converter coupled to an output of the chopper circuit, a first transformer including a first primary coil and a first secondary coil, a second transformer including a second primary coil and a second secondary coil, a first capacitor coupled between an output of the DC-DC converter and the first primary coil, a second capacitor coupled between the output of the DC-DC converter and the second primary coil, a first rectifier circuit coupled to the first secondary coil, and a second rectifier circuit coupled to the second secondary coil. A first output voltage of the first rectifier circuit is adjusted by adjusting an output voltage of the chopper circuit, and a second output voltage of the second rectifier circuit is adjusted by adjusting a powering time during one switching period of the DC-DC converter.

Abstract: An electric power converter includes a chopper circuit, a DC-DC converter coupled to an output of the chopper circuit, a first transformer including a first primary coil and a first secondary coil, a second transformer including a second primary coil and a second secondary coil, a first capacitor coupled between an output of the DC-DC converter and the first primary coil, a second capacitor coupled between the output of the DC-DC converter and the second primary coil, a first rectifier circuit coupled to the first secondary coil, and a second rectifier circuit coupled to the second secondary coil. A first output voltage of the first rectifier circuit is adjusted by adjusting an output voltage of the chopper circuit, and a second output voltage of the second rectifier circuit is adjusted by adjusting a powering time during one switching period of the DC-DC converter.