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Module 3 — Electrical Fundamentals

3.18 — AC Motors

Practice questions test what you know. This note teaches what you don’t.

Question banks train recall. The questions that decide a pass are the borderline ones, where two answers look right — and those are won by understanding. That is what this note is written for.

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AC motors convert alternating current electrical energy into mechanical rotational energy. They are used extensively on aircraft for fuel pumps, hydraulic pumps, fans, compressors, actuators, and many other applications. This section covers the main types of AC motor, their operating principles, and speed control methods.

6 sections 5 worked examples 9 key formulas 9 tables 5 tips 2 warnings

43 exam-style questions in our bank test this topic. This note teaches the theory behind every one of them.

What you will learn

  1. The Rotating Magnetic Field
  2. Induction Motor
  3. Single-Phase Induction Motors
  4. Synchronous Motor
  5. Speed Control of AC Motors
  6. Reversing Rotation
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