| 摘要 |
PROBLEM TO BE SOLVED: To provide: a power conversion device capable of detecting variations in power source environments, such as voltage imbalance and voltage variation of an AC power source; a compressor; a blower; an air conditioner; and a refrigerator, each using the power conversion device.SOLUTION: On the basis of an output voltage, a reactor current and a command voltage of a converter part 10, a power conversion device finds a switching command value D according to a ratio of an output voltage of a rectifier to the command voltage. The power conversion device controls the driving of a switching element 12 of the converter part 10 on the basis of the switching command value D, and also detects a degree of variation in power source environments that is at least one of voltage imbalance and voltage variation of an AC power source on the basis of the switching command value D. |
