Motor using permanent magnets and induction windings for use with an electrical submersible pump

Abstract

An ESP including a motor section for driving the ESP. The motor section includes a stator with winding channels disposed axially therein and windings disposed in the winding channels to generate a stator electromagnetic field. The motor section also includes a rotor rotatably disposed in the stator. The rotor having a body with multiple permanent magnets to generate a constant magnetic field and rotor bars disposed axially in the rotor that cause an induced electromagnetic field when subjected to the stator electromagnetic field. Alternatively, the rotor includes multiple permanent magnets to generate a constant magnetic field wherein the stator electromagnetic field and the constant magnetic field create a two pole magnetic field for the motor section. A method of determining a layout of multiple permanent magnets disposed axially in a rotor to generate a desired constant magnetic field and produce a two pole magnetic field for the ESP and constructing the ESP.