Patent ID: 8829844
Filing Date: 2014-09-09
Classification: F04B,G01N,H02P

Abstract:
1. A method for operating a stepper motor of a pumping system during a fluid intake cycle, comprising: measuring available torque of the stepper motor across a range of motor velocities within which the stepper motor will operate during the intake cycle; calculating a maximum acceleration rate for each of a plurality of motor velocities in the range of motor velocities based on the available torque of the stepper motor measured at that motor velocity; generating an intake velocity profile based on the maximum acceleration rates calculated for the plurality of motor velocities; and accelerating the stepper motor during the intake cycle in accordance with the generated intake velocity profile; wherein accelerating the stepper motor during the intake cycle in accordance with the generated intake velocity profile includes: wherein the intake velocity profile is a first intake velocity profile and further comprising: