| 摘要 |
PROBLEM TO BE SOLVED: To reduce capacitance without reducing the noise reduction capacity of a noise filter, miniaturize an inverter device, and reduce its weight and cost by inserting two single-phase noise filters that are connected in parallel each other into the anode and cathode sides of a DC link part between a rectification part and a reverse conversion part. SOLUTION: An inverter device 21 is provided with a rectification part 23 for rectifying AC from a single-phase AC power supply to DC and a reverse conversion part 25 that inversely converts DC being rectified by the rectification part 23 to AC with variable voltage and frequency and feeds it to a motor 24 and controls the speed of the motor 24 for controlling air-conditioning capacity. First and second single-phase noise filters 26 and 27 that are connected in parallel each other are inserted between the single-phase AC power supply and the rectification part 23. Also, third and fourth single-phase noise filters 29 and 30 that are connected in parallel each other are connected to the anode (+) side and the cathode (-) side of a DC link part 28 for connecting the rectification part 23 and the inverse conversion part 25. |
