| 摘要 |
PROBLEM TO BE SOLVED: To provide an unbalance correction device which when each of a plurality of phases in an AC power source supplying power to a system is brought into an unbalanced state, can easily identify the unbalanced state thereby capable of protecting the system.SOLUTION: The unbalance correction device comprises a voltage identification part, a correction value generation part and a boosting circuit control part. The voltage identification part identifies rectified voltages which are a plurality of rectified AC voltages output from a power source. The correction value generation part generates a correction value for correcting a current corresponding to an unbalanced voltage based on the rectified voltage that is identified by the voltage identification part. On the basis of ratio of the time of the ON state and the time of the OFF state of the switching element, the ON state and the OFF state being obtained by simulating the balanced state in the boosting circuit boosting the rectified voltage and on the basis of the correction value generated by the correction value generation part, the boosting circuit control part controls a time of the ON state and a time of the OFF state of a switching element in a boosting circuit that boosts the rectified voltage.SELECTED DRAWING: Figure 1 |
