Patent ID: 8328523
Filing Date: 2012-12-11
Classification: F04D,G05B

Abstract:
1. A method of control in a system having multiple pumps, wherein the multiple pumps are operated and run together at a substantially synchronous torque to achieve a desired setpoint, wherein the method comprises: responding with a controller to signaling containing information about the desired setpoint, and providing a control output signal; responding with a lead variable speed drive to the control output signal, providing a lead variable speed drive signal for driving one of the multiple pumps, and also providing one or more torque signals; and responding with a lag variable speed drive to the one or more torque signals, and providing a lag variable speed drive signal for driving another one of the multiple pumps; the one or more torque signals containing information so that the lead variable speed drive and the lag variable speed drive operate and run the multiple pumps together at the substantially synchronous torque to achieve the desired setpoint.