Patent ID: 11913463
Assignee: TRANE INTERNATIONAL INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A compressor for compressing a working fluid in a heat transfer circuit, comprising:
a variable frequency drive (VFD) configured to utilize utility power;
a permanent magnet motor electrically connected to the VFD, the permanent magnet motor configured to rotate a driveshaft and compress the working fluid; one or more gas bearings configured to support the driveshaft using the compressed working fluid; a backup gas supply fluidly connected to the one or more gas bearings, the backup gas supply including one or more of a second compressor, a vessel, a vessel with a heater, and a condenser valve; and
a switch-mode power supply electrically connected to the VFD, wherein during an interruption in the utility power, the switch-mode power supply is configured to utilize DC electrical power generated by a back electromotive force of the permanent magnet motor to operate the backup gas supply to provide a flow of compressed working fluid to the one or more gas bearings.