Patent ID: 8192171

Claim:
A compressor system comprising: a lead compressor operable to produce a flow of compressed fluid at a first output; a lag compressor operable to produce a flow of compressed fluid at a second output, the sum of the first output and the second output defining a system output; a lead variable speed motor operable to drive the lead compressor at a first compressor speed to vary the first output; a lag variable speed motor operable to drive the lag compressor at a second compressor speed to vary the second output; a sensor operable to measure a system load; a lead motor drive operable to control the speed of the lead variable speed motor and to set a desired operating state of the lag variable speed motor in response to a comparison of the system load and the system output; and a lag motor drive operable to control the speed of the lag variable speed motor, wherein the lag motor drive communicates with the lead motor drive to receive the desired operating state from the lead motor drive.