| 摘要 |
<p>A switched DC rotating electrical machine (100) is disclosed. The rotating electrical machine (100) includes a stator, a rotor, and switching means (11a, 11b). The stator and rotor includes an excitation winding that has a first and a second input. The excitation winding is adapted, when energised, to cause magnetization of an even plurality of poles associated with the excitation winding. The switching means is, in use, associated with a DC voltage source, where the DC voltage source provides a low voltage output, a high voltage output, and an intermediate voltage output having an electrical potential intermediate the electrical potentials of the high voltage output and the low voltage output. In use, the intermediate voltage output is continuously connected to the first input, and the second input is switched in a cyclic operation by the switching means between connection with the high voltage output, and the low voltage output. The cycle of the cyclic operation includes segments of time when the second input is disconnected from either of the low voltage or high voltage outputs.</p> |
