| 摘要 |
PCT No. PCT/JP90/00564 Sec. 371 Date Feb. 11, 1991 Sec. 102(e) Date Feb. 11, 1991 PCT Filed Apr. 27, 1990 PCT Pub. No. WO90/13941 PCT Pub. Date Nov. 15, 1990.A reluctance type electric motor, in which, when the first excitation coil being energized is discontinued of energizing, a reverse current prevention diode is provided to prevent the discharging electric power of the magnet energy of the first excitation coil from returning to DC power source so as to change accumulated magnetic energy into the magnetic energy of the second excitation coil to be energized next, and to quickly discharge the magnetic energy of the first excitation coil and as well as to quickly accumulate the magnetic energy of the second excitation coil. Furthermore, the magnetic energy of the first excitation coil is charged into a small capacity capacitor to obtain high voltage, the magnetic energy of the second excitation coil is accumulated by utilizing such high voltage, and the magnetic energy is quickly discharged and accumulated so as to prevent generation of the reduced torque and counter torque. As a result of above, it is possible to obtain a highly efficient reluctance type electric motor high rotates at high speed even if the applied voltage is low.
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