| 摘要 |
The actuator has a stator comprising electromagnetic sectors for generating phased electromagnetic fields around the stator and at least one cylindrical element (and preferably two such elements). The stator and the cylindrical element(s) are arranged concentrically around a central axis. The cylindrical element has permanent magnetic elements magnetized radially and arranged as one or more discontinuous helices. Phased magnetization of the stator causes the cylindrical element to rotate around the axis along a helical path, thereby exerting a longitudinal force along the axis. Preferably one cylindrical element rotates along a helical path relative to another cylindrical element that has permanent magnetic elements magnetized radially and arranged in one or more helices. Applications of the actuator include prosthetic limbs and orthoses, and for service and remotely operated robots. |
