Patent ID: 8177519
Filing Date: 2012-05-15
Classification: F04D,H02P

Abstract:
1. A method of controlling a motor operating a pumping apparatus of a jetted-fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus comprising a pump having an inlet connectable to the drain, and an outlet connectable to the return, the pump adapted to receive the fluid from the drain and jet fluid through the return, and the motor coupled to the pump to operate the pump, the method comprising: receiving a power parameter signal related to a power parameter of the motor; filtering the power parameter signal to generate a filtered power signal; comparing the filtered power signal to a fluid system model feedback signal; generating a fluid parameter signal based at least in part on the comparison of the filtered power signal to the fluid system model feedback signal, the fluid parameter signal being related to a fluid parameter of the jetted-fluid system; generating the fluid system model feedback signal by providing the fluid parameter signal to a fluid system model; generating a motor control signal having a correlation to a flow of the fluid through the jetted-fluid system based on the fluid parameter signal; determining whether the motor control signal indicates a condition of the pump; and controlling the motor to operate the pump based on the condition of the pump.