US 9,813,000 B2
Method and system for enhanced accuracy of chemical injection pumps
Kirby Jabusch, Edmonton (CA); and Colin Bussiere, Ardrossan (CA)
Assigned to SIRIUS INSTRUMENTATION AND CONTROLS INC., Edmonton (CA)
Filed by Sirius Instrumentation and Controls Inc., Edmonton (CA)
Filed on Dec. 18, 2015, as Appl. No. 14/974,709.
Prior Publication US 2017/0179856 A1, Jun. 22, 2017
Int. Cl. G05B 11/28 (2006.01); H02P 6/08 (2016.01); F04D 25/06 (2006.01)
CPC H02P 6/08 (2013.01) [F04D 25/06 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method of maintaining consistent output for a pump powered by an electric motor, the method comprising:
sending an electrical measurement of power applied to the motor to a controller;
determining if the electrical measurement indicates a power variation; and
changing a parameter of output from the motor to compensate for the power variation by changing a duty cycle of the motor.