| 摘要 |
PCT No. PCT/JP89/00933 Sec. 371 Date May 9, 1990 Sec. 102(e) Date May 9, 1990 PCT Filed Sep. 12, 1989 PCT Pub. No. WO90/02727 PCT Pub. Date Mar. 22, 1990.A small and inexpensive 3-phase Y-connection direct current motor operable at high speeds with high efficiency. The motor includes a current supply controlling circuit that receives first to third position detection signals from a position detection device having three Hall elements for detecting the position of a rotor, and fourth to sixth position detection signals supplied from the device [and having .currents to the armature coils of respective phases in the forward and reverse directions. When the current supply to one of the armature coils is interrupted at the end of a corresponding position detection signal, magnetic energy stored in the armature coil is supplied to another armature coil which is to be supplied with current by a next position detection signal, thereby rapidly extinguishing the magnetic energy and causing the current supply width required for the armature current to rise to a preset value to an extremely small width so as to eliminate the reduced-torque in the initial stage of the current supply and the countertorque in the end stage of the current supply.
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