| 摘要 |
PURPOSE:To eliminate the braking effect of leakage flux upon a rotor and raise a rotary driving force to the maximum level, by fitting a thin plate of ferrite on the peripheral surface of the core of the rotor. CONSTITUTION:A thin ferrimagnetic plate 14 of Mn-Zn, Ni-Zn or Mg-Mn ferrite, ferrate of trivalent iron or the like is bonded on the peripheral surface of magnetic poles 8, 9 of a rotor 2, which faces a stator 3. The thin plate 14 eliminates the force of leakage flux, which would attract the rotor 2 toward the stator 3. Therefore, the rotor 2 is prevented from being braked by the force. This results in utilizing the turning force of the rotor to the maximum level. |
