| 摘要 |
A two speed, single phase electric motor having a stator assembly including a main winding and a supplemental winding. Each of these windings includes a pair of coil sets. The main winding coil sets and the supplemental winding coil sets are so connected to a source of electrical power such that during high speed operation of the motor the number of effective turns is the sum of the turns in one main winding coil set and its supplemental winding coil set, and during low speed operation, only the turns in the main winding coil set are energized so that there are fewer effective turns. Thus, by varying the number of turns included in the supplemental winding coil sets while keeping the total number of effective turns in the main winding and supplemental winding constant, the low speed breakdown torque of the motor may be preselected during the design of the motor to be less than, equal to, or greater than a desired high speed breakdown torque.
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