ELT 133 Electronic Concepts 3

Lecture Hours: 3
Lab Hours: 3
Credits: 4

Covers electric circuit theory and analysis applicable to passive RLC reactive circuits. Includes transformers, polyphase AC, resonance, passive filters, and other RLC series/parallel circuit applications. Applies fundamental AC/DC concepts developed in ELT 131 and ELT 132. Promotes and supports sustainable and green technologies.

Prerequisite: ELT 132 with a grade of C or better; or consent of instructor.
Student Learning Outcomes:

Apply the reactive circuit analysis techniques, learned in ELT 131 and ELT 132, to transformers and passive/parallel RLC circuit applications.
Construct laboratory circuits to verify lecture theories.
Apply frequency sweep techniques to circuits.

Content Outline

Transformers
- Mutual induction and transformer action
  - Step up/down
  - Turns ratio, voltage transformation
  - Power transfer efficiency
  - Current transformation ratio
  - Core types
- Types
  - Power
    - Isolation/safety
    - Autotransformers
    - Constant voltage
  - Audio
    - Constant voltage
    - Constant impedance
    - Interstage
    - Output stage
  - R.F.
- Transformer connections
  - Winding polarity
  - Series/parallel
  - Multiple and tapped windings
- Impedance characteristics
  - Reflected
  - Matching
- Transformer ratings, losses, frequency effects, loading
Introduction to Polyphase Systems
- Three-phase AC generation
  - Delta connections - voltage/current relationships
  - Wye connections - voltage/current relationships
  - Four-wire systems
  - Advantages of three-phase systems
- Three-phase loads
- Three-phase transformers
  - Delta-Delta, Wye-Delta, Delta-Wye, Wye-Wye
  - Phasing polarities
- Power and power measurement in polyphase systems
RLC Circuit Analysis
- Series RLC circuits
  - Frequency effects on voltage, impedance
  - Waveform and phasor relationships
- Parallel RLC circuits
  - Frequency effects on current, admittance
  - Waveform and phasor relationships
- Complex RLC circuits
  - Series-parallel RLC circuit analysis
  - Practical inductors in parallel RLC circuits
Resonance
- Series resonant circuits
  - RC Circuits
  - LC Circuits
  - Circuit “Q” and Selectivity
- Parallel resonant circuits
  - RC Circuits
  - LC Circuits
  - Circuit “Q” and Damping
Filters
- Terminology
- Single and multiple stage filters
  - RC low pass and high pass
  - RL low pass and high pass
  - RC and RL band pass
  - RC and RL band reject
- Phase shifting characteristics
Bridge Circuits
- AC bridge types
- Formulas and analysis methods
- Bridges as filters
Sinusoidal and Nonsinusoidal Waveforms and Harmonics
- Harmonics
- Waveform synthesis - combining/adding harmonics
- Waveform analysis - harmonics in step/ramp functions
- Fourier series
- Spectrum analyzers
Relation to Sustainable and Green Technologies