Patent ID: 8076881

Claim:
A system, comprising: a first module configured for determining an angle defined by: a first rotating reference frame having an axis aligned with a permanent magnet flux of a permanent magnet motor; and a vector of a motor magnetizing flux of the permanent magnet motor; a second module communicably connected to the first module, wherein the second module is configured for: defining a second rotating reference frame having an axis aligned with the vector, wherein the first and second rotating reference frames are synchronized; and transforming a two-phase set of direct currents from the first rotating reference frame to the second rotating reference frame; a third module communicably connected to the first module, wherein the third module is configured for generating a first direct current reference signal associated with the second rotating reference frame; and a fourth module communicably connected to the third module, wherein the fourth module is configured for generating a second direct current reference signal associated with the second rotating reference frame, wherein the first and second direct current reference signals are orthogonal.