AC induction motor and method of starting same

摘要

An AC induction motor has separate start (1) and run (2) windings radially separated in slots in the stator laminations (6). The start windings (1) are arranged in the radially outer portions of the slots to aid heat dissipation and to increase the flux linkage so as to reduce inrush current during starting. The motor is started by switching on the start windings (1) initially, and switching on the run windings (2) in phase with the start windings (1) when the motor reaches its running speed, but before switching off the start windings (1). In this way, the surge current during switching between the start (1) and run (2) windings is reduced. <IMAGE>