| 摘要 |
A direct current, brushless, biphase motor with four unipolar windings and electronic drive, presents a geometry of the teeth and of the magnet generated field so that in each winding a trapezoidal e.m.f is generated to allow the electronic drive to feel the best switching point on the oblique side of such trapezoidal wave without the use of Hall probes; the two phases are embodied to obtain conduction on 180 DEG per winding, thus as two single-phases in parallel; the two single-phases may be embodied in a different way to permit the electronic selection of the use of three distinct motors in the motor: first single-phase, second single-phase and third biphase. |
