Decomposition of Electric Motor Torque According to Electromagnetic Field Sources
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||8|
|Journal||IEEE Transactions on Energy Conversion|
|Publication status||Published - 20 Nov 2015|
|Publication type||A1 Journal article-refereed|
This paper proposes a systematic approach to isolate and quantify electromagnetic forces and torques between any two distinct parts of an electric motor. The approach is based on a decomposition of the magnetic field into components that are generated by different magnetized or current-carrying motor parts. Forces and torques exerted by the field components can be computed using the conventional force and torque formulas. The proposed decomposition is applied to a squirrel-cage induction motor and to a permanent magnet synchronous motor. In these examples, the magnetic fields are decomposed according to current-carrying conductors, magnetized iron, and permanent magnets. Thereafter, the torques exerted by these fields are specified. The results predict which part-pairs of the motor produce the desired and undesired behavior, for example, torque and torque ripple, respectively.
- Electric machines, Finite-element methods, Magnetic fields, Torque