Patent ID: 8817490

Claim:
A DC-DC converter, comprising: a transformer; a voltage-source power converter that is provided at a primary side of the transformer; a first voltage detection circuit that detects a first voltage between first input and output terminals of the voltage-source power converter; a current-source power converter that is provided at a secondary side of the transformer; a second voltage detection circuit that detects a second voltage between second input and output terminals of the current-source power converter; a current detection circuit that detects an input-output current between the second input and output terminals of the current-source power converter; and a controller that controls the voltage-source power converter and the current-source power converter to transfer power between the primary side and the secondary side of the transformer, wherein the controller includes: a calculation unit that performs calculations based on the first voltage, the second voltage and the input-output current, that compares the first voltage with a first corresponding target voltage so as to generate a first current control input, that compares the second voltage with a second corresponding target voltage so as to generate a second current control input, and that compares the input-output current with the first and second current control in u s so as to generate a command value, and a table unit that include a plurality of parameter sets, the calculation unit performs the calculations based on one of the plurality of parameter sets that is selected from the table unit, and the controller controls the voltage-source power converter and the current-source power converter based on the command value.