| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion device capable of suppressing variation in output current characteristics occurring due to variation in an input/output voltage in a constant-current control region.SOLUTION: A DC-DC converter device 1 includes a transformer 10, an input-side circuit 11, an output-side circuit 12, and a control circuit 13. The control circuit 13 determines a current reference value on the basis of a voltage reference value and an output voltage of the output-side circuit 12. The control circuit 13 controls the input-side circuit 11 on the basis of the current reference value and a current flowing through a primary winding 100 at the time of a constant-voltage control region in which the current reference value is lower than or equal to the maximum current reference value, and on the basis of the maximum current reference value and the current flowing through the primary winding 100 at the time of the constant-voltage control region in which the current reference value is larger than or equal to the maximum current reference value. At this time, the maximum current reference value is adjusted on the basis of an input voltage of the input-side circuit 11 and the output voltage of the output-side circuit 12. For this reason, in the constant-current control region, variation in output current characteristics occurring due to variation in an input/output voltage can be suppressed. |
