| 摘要 |
PROBLEM TO BE SOLVED: To detect freezing of an air bearing and a rotary shaft without using a velocity sensor.SOLUTION: An electric centrifugal compressor device includes: a fuel cell stack 102; a compressor impeller 130 rotating integrally with a rotary shaft 132, and compressing air by rotation to supply the air to the fuel cell stack 102; a compressor motor 136 rotating the compressor impeller 130 by rotating the rotary shaft 132; an air bearing 138 supporting the rotary shaft 132 by the air present in a gap between the air bearing 138 and the rotary shaft 132; a flow detection unit 172 detecting a flow in an air supply channel 152 through which the air supplied from the compressor impeller 130 to the fuel cell stack 102 passes; a compressor motor driver 126 controlling driving of the compressor motor 136; and a freezing detection unit 174 detecting freezing of the air bearing 138 and the rotary shaft 132 on the basis of the flow of the air detected by the flow detection unit 172. |
