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Module 18 — Electric Power Plant

18.2 — Engine Performance

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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The 18.1 note explains how an electric engine turns electrical energy into shaft work. This chapter is about how it behaves once it is doing so: the torque it can give at each speed, where it converts energy efficiently, how temperature, supply voltage and current move those limits, what happens when the power flow reverses, and how its control system keeps it inside the limits it was certified to. In the EASA data sheets of both certified electric engines used …

5 sections 7 worked examples 3 key formulas 3 tables 3 diagrams 4 tips 4 warnings

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

What you will learn

  1. Power and Torque Characteristics of Electric Engines
  2. Efficiency Maps and Operating Envelopes
  3. Effects of Temperature, Voltage, and Current on Performance
  4. Regenerative Operation Principles (Where Applicable)
  5. Performance Limitations and Protection Functions
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