Study Notes on Electrics and Electronics for CAE ATPL Ground Training Series - Book 3

CAE ATPL Ground Training Series - Electrics and Electronics

Introduction

  • Training Partner: CAE Inc.

  • Edition Year: 2020

  • Purpose: This book serves to aid students enrolled in an approved EASA ATPL course for preparation for theoretical knowledge examinations.

  • Copyright Notice: Contains restrictions on reproduction and use; accuracy of information is not guaranteed.

Using This Book

  • Structure: Divided into EASA Learning Objectives represented as numbered sections (e.g., 02.00 for Chapter 2, 02.03 for specific objectives).

  • Important Icons:

    • Target Icon: Indicates EASA Learning Objectives.

    • Light Bulb Icon: Links to additional subjects for concept reinforcement.

    • Magnifying Glass Icon: For complementary resources enhancing understanding, not part of the EASA objectives.

    • Calculator Icon: Highlights important equations.

    • Gear Icon: Marks examples and questions.

    • Red Highlight: Indicates glossary terms.

CAE ATPL Ground Training Series Publications

  • List of Books:

    1. Book 1: Air Law

    2. Book 2: Airframes and Systems

    3. Book 3: Electrics and Electronics

    4. Book 4: Powerplant

    5. Book 5: Instrumentation

    6. Book 6: Mass and Balance

    7. Book 7: Performance

    8. Book 8: Flight Planning and Monitoring

    9. Book 9: Human Performance and Limitations

    10. Book 10: Meteorology

    11. Book 11: General Navigation

    12. Book 12: Radio Navigation

    13. Book 13: Operational Procedures

    14. Book 14: Principles of Flight

    15. Book 15: Communications

    16. Book 16: Knowledge, Skills and Attitudes (KSA)

Table of Contents Overview

  • Topics include basics of electrics and electronics relevant to aircraft systems, batteries, generation, distribution, and circuit protection.

Electrics and Electronics Content

General, Basic Applications

  1. Static Electricity

    • Description of material properties at the atomic level.

    • Electric charge types: Protons (positive) and Electrons (negative).

    • Ionization process described: Positive and negative ions explained.

Static Discharger

  1. Role: Reduces static build-up on aircraft.

  2. Location: Trailing edges and tips of wings.

  3. Pilot's responsibility: Inspect for damage and ensure static dischargers are in condition.

Aircraft Grounding Before Fuel Servicing

  • Importance: Prevents fire or explosion during fueling.

  • Bonding procedure: Aircraft must be earthed before refueling begins.

Electrical Bonding

  • Purpose: Prevents potential differences that could lead to sparks and fire.

  • Connection system: All metal parts bonded to ensure low resistance in current flow.

Direct Current (DC)

  1. Definition: Current flows in one direction only.

  2. Conductivity: Refers to materials that allow easy electron flow (conductors, insulators, semiconductors).

Ohm’s Law

  1. Statement: Relationship between voltage (V), current (I), and resistance (R).

  2. Resistance Calculation: R=racVIR = rac{V}{I}

Electrical Power

  1. Definition: Rate of doing work influenced by voltage and current.

  2. Formula: P=VimesIP = V imes I (Power measured in Watts)

Alternating Current (AC)

  1. Definition: Current that changes direction periodically, advantages over DC:

    • Simpler generator construction.

    • Easier voltage transformation with transformers.

Electromagnetism

  1. Current production: Flow of current induces magnetic fields.

  2. Induction: Principle used in transformers and electric motors.

Circuit Protection (Fuses and Circuit Breakers)

  1. Function: Protects circuits from overloads and faults.

  2. Comparison: Fuses break the circuit before full current is reached, whereas circuit breakers open afterward.

Semiconductors and Logic Circuits

  1. Semiconductors: Materials that conduct electricity under specific conditions.

  2. Logic Functions: Basic functions (AND, OR, NOT, NOR, NAND) in logic circuits.

Battery Types and Functions

  1. Primary vs. Secondary Batteries: Primary cannot be recharged. Secondary can be reused multiple times.

  2. Lithium Batteries: Provide higher specific energy but have safety hazards like thermal runaway.

    • Thermal Runaway: Condition where batteries overheat leading to dangerous situations.

Electrical Motors

  1. Principles: Convert electrical energy to mechanical energy; types include AC and DC motors.

  2. Application: Used in various aircraft systems including starters and pumps.

Generation and Distribution

  1. DC Generation: Basics of a simple DC generator and its components.

  2. AC Generation: Three-phase generators explained, including their advantages.

  3. Distribution Systems: Differentiation between split and parallel systems in aircraft electrical distribution.

Monitoring and Load Management

  1. System Controls: Monitoring generators, busbars, load management systems.

  2. Alerts and Safety: Importance of monitoring systems for operational safety.

Glossary Index

  • Key terms related to electrics and electronics explained.

Summary

  • This book provides an exhaustive overview of electrics and electronics relevant to aircraft systems, essential for EASA ATPL examinations, entailing both theoretical and practical applications.

  • Contains key information on structure, components, principles, applications, and safety measures in aircraft electrical systems.