×

Controller for a motor and a method of controlling the motor

  • US 20050226731A1
  • Filed: 04/08/2005
  • Published: 10/13/2005
  • Est. Priority Date: 04/09/2004
  • Status: Active Grant
First Claim
Patent Images

1. A pumping apparatus for a jetted-fluid system comprising a vessel for holding a fluid, a drain, and a return, the pumping apparatus being connectable to a power source and comprising:

  • a pump comprising 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;

    a motor coupled to the pump to operate the pump;

    a voltage sensor coupled to the motor and configured to generate a first signal having a relation to a voltage applied to the pump motor;

    a current sensor coupled to the motor and configured to generate a second signal having a relation to a current applied to the pump motor;

    a switch connectable to the power source and coupled to the motor, and the switch configured to control the current through the motor; and

    a controller coupled to the voltage sensor, the current sensor, and the switch, the controller configured to generate a value based on the first and second signals, the value having a relation to the motor input power, and to control the motor based on the value.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×