| 摘要 |
PROBLEM TO BE SOLVED: To provide the shaft potential reducing method of an air-conditioning fan motor system difficult to produce electrolytic corrosion on the bearing of a fan motor. SOLUTION: In the air-conditioning fan motor system driving a multi-motor by an inverter 3 using the output of a transformer 2 as power, the secondary side of the transformer 2 being the power source of the inverter is not grounded. |
