| 摘要 |
<p>A technical problem with a four pole wave wound direct current motors is that excessive currents flow in single turn windings when such a motor is operated at relatively low speeds and/or relatively high voltages, and that plural turn windings can not be formed for a reduced number of commutator segments or from heavy gauge rectangular wire, to efficiently fill armature slots. This problem is solved by a plural turn winding (19) having two ends (95, 97) for connection to commutator segments substantially 180o apart on the armature (10) and with at least four sides (82, 84, 86, 88) defining at least two open turns, for engaging slots (17) in the armature core (16) which are spaced substantially 90o apart. A three open turn winding (100) is also disclosed. The number of open turns is limited only by space available in the armature coil slots (17). </p> |
