| 摘要 |
A method for determining a dimension in a motor is described. By applying Fourier analysis, a sequence of terms is obtained. Since the fifth harmonic is the most undesirable term, the minimization of the fifth harmonic term will make resultant waveform closer to sine wave. Based upon the above, a determination of an angle delta is described, wherein the fifth harmonic term of the sequence of terms is minimized.An electric motor having a rotor and a set of slot on said rotor surface having a set of magnets with a width delta along the circumference of said rotor surface is described. The width delta is determined by a method that includes applying Fourier analysis thereby a sequence of terms is obtained. Since the fifth harmonic is the most undesirable term, the minimization of the fifth harmonic term will make resultant waveform closer to sine wave. Based upon the above, a determination of an angle delta is described, wherein the fifth harmonic term of the sequence of terms is minimized.
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