| 摘要 |
FIELD: electric engineering, possible use for controlling three-phased asynchronous electric motors of down-pumps, used mainly for oil extraction. ^ SUBSTANCE: in the method for controlling the three-phased asynchronous electric motor of down- pump and in the system for controlling electric motor of down-pump in case of failure of frequency regulator or jamming of electric motor rotor, by means of mode switch, mode of direct launch from electric network is set. In that mode transfer of electric energy to electric motor occurs via chain: three-phased electric network - increasing voltage transformer - three-phased asynchronous electric motor. The control system contains a frequency control circuit and direct launch circuit, first key, connected to frequency controller and controlling feeding of power to it; input and output filters, second key, by means of which control modes are switched, third key, controlled by controller, and transformer which increased power voltage of electric motor. ^ EFFECT: increased efficiency. ^ 2 cl, 4 dwg |
