Fluid pump speed controller
First Claim
Patent Images
1. A motor speed controller for operating at least one pump at discrete speeds while minimizing energy and speed variations, comprising:
- a) an electric motor;
b) means operatively connected to said motor for controlling the speed thereof, said motor controlling means comprising means for setting at least one set point representative of the maximum speed of said motor; and
c) an adjustable frequency drive operatively connected to said motor controlling means and to said motor for applying a signal representative of said controlling means to said motor.
0 Assignments
0 Petitions
Accused Products
Abstract
A fluid pump speed controller apparatus for ensuring adequate system fluid pressure while minimizing energy consumption. The fluid pump speed controller has an adjustable frequency motor drive and control circuits to vary fluid pump motor speeds based on system fluid demand, monitored by a sensor. The control circuits set the pump speed, based on input from the sensor. The control circuits also set parameters in the control circuit logic, and are capable of self calibration and controlling multiple fluid pumps.
174 Citations
14 Claims
-
1. A motor speed controller for operating at least one pump at discrete speeds while minimizing energy and speed variations, comprising:
-
a) an electric motor; b) means operatively connected to said motor for controlling the speed thereof, said motor controlling means comprising means for setting at least one set point representative of the maximum speed of said motor; and c) an adjustable frequency drive operatively connected to said motor controlling means and to said motor for applying a signal representative of said controlling means to said motor. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of calibrating at least one fluid pump speed controller, the steps comprising:
-
a) determining whether more than one fluid pump is operational; and b) if only one fluid pump is operational, setting points on a fluid pump speed controller operatively connected to said fluid pump, said set points being representative of maximum and minimum operating speeds of said fluid pump. - View Dependent Claims (8, 9)
-
-
10. A method of operating at least one fluid pump speed controller, the steps comprising:
-
a) determining whether more than one fluid pump is operational; b) if only one fluid pump is operational, driving said fluid pump at its maximum operating speed; c) decreasing the operating speed of said fluid pump when said system reaches a first stable pressure level; d) continue decreasing the operating speed of said fluid pump to the minimum operating speed thereof when said system reaches a second stable pressure level; and e) adjusting the operating speed of said fluid pump if the system pressure is out of a predetermined range of pressure. - View Dependent Claims (11, 12, 13, 14)
-
Specification