PUMP SUPPLY FAILURE CONDITIONS DETECTION AND THE MOTOR CONTROL SYSTEMS AND METHODS TO PREVENT THE PLUNGER ON THE LIQUID IMPACT Russian patent published in 2019 - IPC F04B47/06 F04B49/06 

FIELD: engines and pumps.

SUBSTANCE: invention relates to the linear permanent magnet motors and relates to the generated by the linear motor force monitoring means, and determining the supply failure condition existence and motor control for caused by the supply failure pump plunger fluid impact prevention. Consumed by the submersible electric pump motor current during the working stroke is monitored. Based on the instantaneous current, the generated by the motor instantaneous forces are determined. Supply failure condition may be indicated by the unpredictable, significant reductions in force created, smaller reductions in force that occurs over a longer period of time, or forces that are less than those observed during the delay time. In response to the supply failure condition detection, the motor stepped movement for the remainder of its stroke, temporarily stop and restart can be performed.

EFFECT: preventing the pump plunger on the liquid damaging impact occurrence, which otherwise would have been the result of the supply failure condition.

15 cl, 6 dwg