| 摘要 |
Systems and methods for constructing electric motors in which rotor sections are individually keyed to a rotor shaft such that, in a resting position, the rotor sections are circumferentially shifted (clocked) with respect to each to mitigate effects of harmonic feedback, torsional flexibility and the like. In one embodiment, a system includes an electric drive, and an ESP coupled to it by a power cable. The ESP motor has a rotor in which multiple permanent-magnet rotor sections are mounted to a shaft. Within each rotor section, permanent magnets are positioned in two or more axially aligned rows. Adjacent rotor sections are clocked with respect to each other so that, in operation, the rows of permanent magnets in the different rotor sections are positioned to counter the harmonic feedback or to use torsional deflection to equalize torque contributions from the different rotor sections. |
