| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for inhibiting a rotary apparatus from being vibrated.SOLUTION: A rotary apparatus 100 includes: a stator core having a plurality of projecting poles protecting from an annular part; and a magnet having a plurality of magnet poles opposite to the projecting poles. When the plurality of magnet poles of the magnet are measured in a circumferential direction, a fundamental wave component, a third-order harmonic component and a fifth-order harmonic component are included in a waveform of magnetic flux density to the rotary angle. In the waveform of the magnetic flux density, size of the fifth-order harmonic component is adjusted so as to become smaller than that of cogging torque generated when the cogging torque is made not to include the fifth-order harmonic component.SELECTED DRAWING: Figure 2 |
