Skytech

Industry Training

ST40 Charging System Troubleshooting (3 days)

The student is able to recommend repair of charging systems following manufacturers recommendations. Upon successful completion, the student is able to: Define the purpose and fundamentals of charging systems. Describe the types and construction features of charging system components. Explain the principles of operation of charging systems. Perform inspection, testing, and diagnostic procedures for charging systems. Recommend repair procedures for charging systems and components.

Module Content:

1. Define the purpose and fundamentals of charging system components.
   • current flow
   • diodes
   • electromagnetism
   • voltage induction
   • inductive reactance of stator
   • battery conditions as affecting internal resistance
   • principles of tracing wiring schematics
   • electrical/electronic symbols
   • Ohm's Law
   • temperature effects
   • factors affecting voltage and amperage output
     • field strength
     • rotor speed
     • inductor reactance
   • Describe the types and construction features of charging system components.
   • brush-type alternators
     • rectifier
     • stator
     • delta
     • wye
     • rotor
     • field winding
     • poles
     • slip rings
     • diode trio
     • brush assembly
     • case
     • bearings and pulleys
   • brushless alternators
     • stationary field
     • magnetic poles
     • stator
     • rectifier
     • transformer 12/24 volt system
   • voltage regulators
     • external electronic
     • internal electronic
     • electronic digital
2. Explain the principles of operation of charging systems.
   • brush-type alternators
     • rectifier
     • full-bridge
     • half-bridge
     • induction principles
     • electromagnetism
     • induction
     • inductive reactance
     • alternating current
     • three-phase
   • brushless alternators
   • dual voltage alternator
     • transformer principle
   • voltage regulator
     • electronic principles
     • load response
3. Perform inspection and diagnostic procedures following manufacturers recommendations and perform assigned operations for charging systems
   • perform charging system visual inspection
     • belt tension and alignment
     • connections and wiring
     • battery and alternator specifications and application
   • outline recommended charging systems testing sequence
   • perform battery condition tests
   • perform charging circuit resistance voltage drop tests
   • perform charging system current and voltage output tests
   • identify specific charging system faults from test results
   • perform alternator bench testing for output current and voltage
     • perform alternator component tests
   • perform voltage regulator bench tests
   • identify electronic noise suppression devices
4. Recommend reconditioning or repair procedures following manufacturers recommendations and perform assigned operations for charging systems.
   • verify output capacity to satisfy the specific vehicle electrical load specifications
   • perform adjusting procedures of alternator drive belt tension and alignment

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Sudbury, Ontario
Canada P3A 3V8

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