UEENEEH111A – Trouble. d.c. power supplies

T1. power supplies operating principles and applications

  • Power supply function
  • Block diagram identifying each sub-system
  • Expected waveforms in a power supply
  • Constant Voltage
  • Constant Current

T2. D.C. rectification circuits

  • Junction diode characteristics
  • Transformer turns ratio and losses
  • Half wave and full wave rectifiers
  • Dual rail supply

T3. Filter circuits

  • Capacitive and inductive filters
  • Ripple

T4. Zener diode regulator

  • Zener shunt regulator circuit
  • Load and line regulation definitions
  • Operating parameters and data sheets

T5. Three terminal regulator circuits

  • Need for regulation
  • Three terminal regulator characteristics
  • Short circuit protection
  • Line and load regulation
  • Regulated power efficiency
  • Remote voltage sensing

T6. Electronic testing and measuring devices and techniques

  • Test/measuring devices and their application – analogue and digital multimeters, voltage and digital testers, signal generators and oscilloscopes
  • Connection of test/measuring devices into a circuit encompassing:
  • safety procedures
  • circuit arrangement of test/measuring devices
  • Taking readings
  • Storage, maintenance and care of test/measuring devices

T7. D.C. power supply testing and fault finding

  • Rectifier diode faults
  • Zener diode faults
  • Three terminal regulator faults

T8. OH&S

  • Apply safe working practices and relevant Standards, Codes and Regulations

August 2017
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