Patent ID: 8353348

Claim:
A method of providing the closed-loop feedback control of a remote AC electric motor means that has specific required operating parameters including the required operating frequency, the required operating voltage, and the required operating current, said AC electric motor means disposed below the surface of the earth and located within in a borehole in the earth that receives electrical energy through a long umbilical means which receives power from an uphole AC generator means that comprises at least the steps of: (a) measuring a first set of electrical parameters including the first measured frequency, first measured voltage and first measured current provided to said remote AC electric motor means using a multiplicity of sensors located below the surface of the earth; (b) sending information related to said first set of measured parameters through a bidirectional communications means to a computer means located on the surface of the earth; (c) comparing said first set of measured parameters with the required operating parameters within said computer means; (d) determining within said computer means any first set of adjustments that need to be made to the first set of measured parameters to provide the required operating parameters to said AC electric motor means; (e) sending information related to any first set of said adjustments through bidirectional communications means to the uphole AC generator means to adjust its output parameters to provide a second output frequency, second output voltage, and second output current provided by said AC generator means; (f) suppressing any inductive reactance associated with the long umbilical that may be partially wound on a drum using an inductive suppression means; (g) providing a second set of operating parameters, to said AC electric motor means; (h) repeating said measurements and said adjustments a plurality of successive times, thereby providing the closed-loop feedback control to provide the required operating frequency, the required operating voltage, and the operating current to said AC electric motor means.