US 12,215,695 B2
Method of controlling a pump and motor
Melissa Drechsel Kidd, Coral Springs, FL (US); William James Genaw, Duluth, GA (US); Michael Pasche, Sharon, WI (US); and Gary T. Baase, II, Kenosha, WI (US)
Assigned to Pentair Flow Technologies, LLC, Delavan, WI (US)
Filed by Pentair Flow Technologies, LLC, Delavan, WI (US)
Filed on Nov. 8, 2022, as Appl. No. 18/053,522.
Application 18/053,522 is a continuation of application No. 16/694,575, filed on Nov. 25, 2019, granted, now 11,493,034.
Application 16/694,575 is a continuation of application No. 15/421,251, filed on Jan. 31, 2017, granted, now 10,590,926, issued on Mar. 17, 2020.
Application 15/421,251 is a continuation of application No. 12/481,435, filed on Jun. 9, 2009, granted, now 9,556,874, issued on Jan. 31, 2017.
Prior Publication US 2023/0068188 A1, Mar. 2, 2023
Int. Cl. F04D 15/00 (2006.01); F04B 17/03 (2006.01); F04B 47/00 (2006.01); F04B 47/06 (2006.01); F04B 49/06 (2006.01); F04B 49/08 (2006.01); F04B 49/10 (2006.01); F04D 13/08 (2006.01); F04D 13/10 (2006.01); F04D 15/02 (2006.01); F04D 27/00 (2006.01)
CPC F04D 15/0066 (2013.01) [F04B 17/03 (2013.01); F04B 47/06 (2013.01); F04B 49/06 (2013.01); F04B 49/065 (2013.01); F04B 49/08 (2013.01); F04D 13/08 (2013.01); F04D 13/10 (2013.01); F04D 15/0077 (2013.01); F04D 15/0088 (2013.01); F04D 15/0209 (2013.01); F04D 15/0236 (2013.01); F04D 15/0254 (2013.01); F04D 27/004 (2013.01); F04B 47/00 (2013.01); F04B 49/10 (2013.01); F04B 2203/0204 (2013.01); F04B 2205/04 (2013.01); F04B 2205/05 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of controlling a pump driven by a motor, the motor connected to a drive, the method comprising:
determining a water pressure value via a pressure transducer in communication with a controller connected to the drive;
calculating a pressure error based on a comparison between the determined water pressure value and a desired water pressure value;
implementing a proportional/integral/derivative (PID) method using the pressure error as an input;
updating a speed control command to adjust the drive based on the pressure error;
setting a low band pressure threshold;
determining if the motor is off;
in response to a determination that the motor is off,
monitoring the water pressure value;
determining that the water pressure value is below the low band pressure threshold; and
restarting the motor via the controller.