| 摘要 |
<p>An armature for electric motors having a magnetic core of stacked laminations mounted on a shaft with a plurality of electrically conductive rotor bars disposed in the magnetic core, and also having a number of arch shaped permanent magnets disposed in the core that are circularly spaced from one another and arranged concentrically with the shaft. Each permanent magnet has a pole of one magnetic polarity on its radially outer face and a pole of opposite polarity on its radially inner face, and is surrounded by magnetic core material at its circumferential ends and radially inner side to form flux return paths, whereby there are two magnetic armature poles for each permanent magnet, the center of the armature is magnetically neutral, and the structure is relatively easy to fabricate.</p> |
