| 摘要 |
An electric motor with solely one direction of rotation and electronic speed control, includes two mutually rotatable parts with ferromagnetic cores (1, 2) separated by an air gap (6). The state core (1) is provided with a peripherally extending ring of magnet pole groups each including at least one pair of salient magnet poles (3, 4), the one being ferromagnetic (4) and the other permanently magnetic (3). All magnet pole groups are connected magnetically to a common magnetizing winding (5), which magnetizes all magnet pole groups simultaneously in a manner such that the ferromagnetic pole and the permantely magnetic pole of each group is magnetized in the same direction. The rotor core (2) is provided with a peripherally extending ring of salient ferromagnetic reluctance poles (7) with twice the pole pitch of the stator. Each reluctance pole has a width which over a part of the pole corresponds to a stator pole pitch which over the remaining part of the reluctance pole is smaller, so that each reluctance pole (7) presents a part (7B) which projects in a predetermined peripheral direction common to all reluctance poles. |
