Abstract
The paper presents an algorithm and software for the optimal design of
permanent magnet brushless DC motors. Such motors are powered by DC
voltage sources via semiconductor switches connected to the motor phase
belts. The software is adjusted to the design of motors with NdFeB high
energy density magnets. An attention has been given to issues important in
the design of the motors, i.e., permanent magnet selection, structure of
magnetic circuit, and armature windings. Particularly, precision of
calculation of the permanent magnet operating point, visualization of
selection process of the winding belts, and magnetic circuit dimensioning
have been investigated. The authors have been trying to make the equations
more specific and accurate than those presented in the literature. The
user software interface allows changes in the magnetic circuit dimensions,
and in the winding parameters. It is possible to examine simultaneously
the influence of these changes on the calculation results. The software
operates both with standard and inverted (outer rotor) motor structure. To
perform optimization, a non-deterministic method based on the evolution
strategy (ž + λ) - ES has been used.
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