Prepare for the essential 636 Period 3 Motor Final Test with comprehensive flashcards and detailed questions. Access explanations and hints for each question to ace your exam!

Multiple Choice

Three phase motors have _________.

Three-phase motors generate a rotating magnetic field directly from the three-phase supply by energizing the stator windings in a balanced way. Because this rotating field starts the rotor motion without needing a separate starting winding, there’s no distinct start winding in the standard design. The windings that are energized during both starting and running are the run windings, so these motors use run windings only. The idea that there would be only a start winding is incorrect because a motor wouldn’t run once it starts, and the notion of both run and start windings isn’t how typical three-phase induction motors are built. No windings at all would make operation impossible.

Three-phase motors generate a rotating magnetic field directly from the three-phase supply by energizing the stator windings in a balanced way. Because this rotating field starts the rotor motion without needing a separate starting winding, there’s no distinct start winding in the standard design. The windings that are energized during both starting and running are the run windings, so these motors use run windings only. The idea that there would be only a start winding is incorrect because a motor wouldn’t run once it starts, and the notion of both run and start windings isn’t how typical three-phase induction motors are built. No windings at all would make operation impossible.