| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion device that allows reducing manufacturing cost, downsizing, and achieving high efficiency.SOLUTION: A power conversion device is capable of supplying power between a first battery B1 and AC power input/output terminals T1 and T2 and between a second battery B3 and the AC power input/output terminals T1 and T2. The power conversion device includes: a transformer Tr having a first coil L1, a second coil L2, and a third coil L3; a first bridge circuit 10 connected between the first coil L1 and the first battery B1; a second bridge circuit 20 connected between the second coil L2 and the AC power input/output terminals T1 and T2; a third bridge circuit 30 connected between the third coil L3 and the second battery B3; and a control circuit 50 controlling each bridge circuit. When causing the first battery B1 to supply power to the first coil L1, the control circuit 50 variably controls a voltage applied to the second bridge circuit 20 on the basis of a voltage of the first battery B1, a voltage of the second battery B3, and the number of turns of each of the coils L1, L2, and L3. |
