电机控制 - 电机控制基本原理教程

电机控制 - 电机控制基本原理教程

AC Induction Motors




Copyright Texas Instruments 2011
Induction Machines
Invented over a century ago by Nikola Tesla

No permanent magnets

Think of it as a rotating transformer.
Stator is the primary, rotor is the
secondary.

Rotor current is “induced” from
stator current




Motor Glossary Tutorials Exit
Rotating Stator Fields on an ACIM
This slide is very important, as it shows how the three phases interact to create a rotating magnetic field on the stator. Not
only are the coils spatially separated from each other by 120 degrees, but we will drive them with three-phase sine wave
currents which are also separated in phase by 120 degrees. This results in three magnetic vectors which oscillate back and
forth