Rotor modules and assemblies for permanent magnet motor for esp

Abstract

Improvements to electrical motors are disclosed. For example, a rotor assembly for an ESP motor can include a plurality of rotor modules, each configured to be disposed about and rotationally coupled to a drive shaft and each comprising a plurality of permanent magnets, with each rotor module being skewed with respect to one or more other of the plurality of rotor modules. Another approach for providing skew may be using a rotor module having a plurality of rotor module subsections, each configured to be disposed about a drive shaft and each comprising a plurality of permanent magnets, with each rotor module subsection being skewed with respect to one or more other of the plurality of subsections and coupled together to form a rotor module having inherent skew. In some embodiments, inherently skewed rotor modules may also be skewed with respect to one another. Related systems and methods are also disclosed.