AN AC REGULATING-SPEED MOTOR WITH AXIAL-FIELD AND ITS SPEED-TORQUE CHARACTERISTIC

摘要

The speed regulation of AC motors is always a important topic in the field of electrical machines and drives, and a study of the axial-field machines due to their good performances is increasingly attracting the attention of scholars and engineers. For the above-mentioned facts, an AC steplessly regulating-speed motor with axial-field has been developed. In this paper,its configuration and operating principle are introduced, a series of the calculating formulas, which include the speed-torque characteristic,critical torque and critical slip as well as the relation between relevant parameters when starting torque is equal to critical torque such as those used on theoretical analyses , and the family of speed-torque experimental curves in different exciting currents can be given, those are in good agreement with theoretical analyses. In the end, we will compare its merits and defects with other AC speed-regulating methods and offer its applicable occasions.