Patent ID: 7437215
Filing Date: 2008-10-14
Classification: E21B,F04B,F04C,Y02P

Abstract:
1. A method for controlling the operation of a pump for optimizing pump efficiency and productivity under electrical power disturbance conditions, wherein the pump is driven by an AC electrical motor having a motor drive; said method comprising the steps of: determining an occurrence of an electrical power disturbance; determining whether the power disturbance is a blackout condition, a brownout condition, a phase loss condition or a voltage imbalance condition; and using a backspin controller to provide controlled operation of the motor when a power outage condition is determined to be a blackout condition, using a power dip controller to provide controlled operation of the motor when the power outage condition is determined to be a brownout condition, and using a phase loss controller to provide controlled operation of the motor when the power outage condition is determined to be a phase loss or voltage imbalance condition.