PUMP PLANT WITH BOREHOLE LINER AC CONVERTER-FED MOTOR Russian patent published in 2014 - IPC F04B47/06 F04B17/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates to machine building, particularly, to displacement pumps with linear borehole motor drives. Proposed plant comprises borehole part including pump and borehole linear AC converter-fed motor. Moving part (a runner) can reciprocate. Electronic control unit consists of surface and borehole parts. Borehole part consists of inverter arranged in sealed case at normal internal air pressure. Inverter output is electrically connected with surface part and winding via sealed lead-ins. Inverter control unit is connected with the runner position transducer sensors via extra sealed lead-ins. It comprises runners step counter. Surface unit is composed of input rectifier, single-phase HF regulation inverter and output rectifier, all being connected in series.

EFFECT: higher plant efficiency.

5 cl, 2 dwg