| 摘要 |
A brushless direct current motor (10) includes a permanent magnet rotor (16) and a set of stator windings (14). The motor (10) further includes a circuit (22) for changeably connecting the set of stator windings (14) to operate in a first electrical configuration or a second electrical configuration. In the second electrical configuration, the circuit (22) connects only some of the stator windings for receiving current. The circuit (22) electrically isolates the unused stator windings from the used or connected stator windings.
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