Patent ID: 9309872
Filing Date: 2016-04-12
CPC Classification: F04B,Y10S

Claim Text:
1. A method, comprising: connecting a brushless DC motor to a mechanical piston in a pump having an inlet and an outlet; configuring a controller for controlling the brushless DC motor and directing a fluid from the inlet of the pump to the outlet of the pump, the controller having a non-transitory computer-readable medium carrying software instructions for controlling the pump and a processor communicatively coupled to the non-transitory computer-readable medium and the pump; and the controller controlling a position of the mechanical piston in the pump by controlling an operating frequency of a position control loop for the brushless DC motor; wherein the position control loop is configured to run at a first frequency during a dispensing operation of the pump for a first level of position control of the brushless DC motor and to run at a second frequency during a non-dispensing operation of the pump for a second level of position control of the brushless DC motor.