FIELD: oil production industry. SUBSTANCE: device has step-down power transformer connected to frequency converter, and electric motor connected to centrifugal subsurface pump. Additionally, mounted on shaft of electric motor rotor are high-power permanent magnets. Frequency converter is adapted to operating voltage of electric motor and accommodates rectifier and thyristor-based inverter with natural commutation. Output of converter is connected to electric motor. EFFECT: higher efficiency. 1 dwg
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