Self-Centering Electromagnetic Transducers

摘要

Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.

主权项

1. An electromagnetic transducer comprising:
an outer yoke comprising a ferromagnetic material; a coil assembly comprising a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke; an inner yoke comprising a ferromagnetic material a magnet, wherein:
the magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet;the inner yoke is disposed within the magnet; andthe magnet is free to translate between the outer yoke and the inner yoke; and at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke.