Podcast
Questions and Answers
What describes a three-phase fully controlled rectifier with R load?
What describes a three-phase fully controlled rectifier with R load?
- Provides zero output voltage under all load conditions.
- Can convert AC to DC using silicon-controlled rectifiers. (correct)
- Only allows current flow during positive half cycles.
- Requires additional diodes for full-wave operation.
Which converter operates in Continuous Conduction Mode (CCM)?
Which converter operates in Continuous Conduction Mode (CCM)?
- Buck converter maintaining inductor current at zero.
- Step-down converter with significant load variations.
- Boost converter where the inductor never discharges fully. (correct)
- Buck-boost converter that intermittently switches off.
What is a key characteristic of PWM with bipolar voltage switching?
What is a key characteristic of PWM with bipolar voltage switching?
- Generates a single polarity output waveform.
- Results in higher harmonic distortion compared to unipolar modulation.
- Switching occurs only at the zero-crossing of the input signal.
- Allows for more precise control of output voltage than unipolar switching. (correct)
What is the primary purpose of harmonic analysis in three-phase converters?
What is the primary purpose of harmonic analysis in three-phase converters?
Which mode of operation is associated with three-phase square wave inverters?
Which mode of operation is associated with three-phase square wave inverters?
Flashcards
Three-phase AC-DC Converters
Three-phase AC-DC Converters
Electronic circuits converting three-phase AC power to DC power.
DC-DC Converters
DC-DC Converters
Electronic circuits changing DC voltage levels.
Chopper operation
Chopper operation
Switching DC power, affecting output voltage/current. Important to control.
PWM (Pulse Width Modulation)
PWM (Pulse Width Modulation)
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AC-AC Power Control
(Phase Control)
AC-AC Power Control (Phase Control)
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Study Notes
Unit 3: Three-Phase AC-DC Converters & AC-AC Converters
- Three-phase half-wave rectifier with R and RL load.
- Three-phase fully controlled rectifier with R and RL load.
- Three-phase semi converter with R and RL load.
- Expression for output voltage.
- Harmonic analysis.
- Three-phase dual converters.
- Numerical problems.
- AC-AC power control by phase control with R and RL loads.
- RMS output voltage.
- Single-phase step-down and step-up bridge cycloconverter.
- Numerical problems.
Unit 4: DC-DC Converters
- Operation of basic chopper.
- Classification.
- Control techniques.
- Steady-state time-domain analysis of basic chopper.
- Analysis of Buck, Boost, and Buck-Boost converters.
- Continuous Conduction Mode (CCM).
- Discontinuous Conduction Mode (DCM).
- Output voltage equations using volt-second balance in CCM and DCM.
- Expressions for output voltage ripple and inductor current ripple.
- Numerical problems.
Unit 5: DC-AC Converters
- Introduction.
- Single-phase half-bridge and full-bridge inverters with R and RL loads.
- Phase Displacement Control.
- PWM with bipolar voltage switching.
- Three-phase square wave inverters.
- 120° conduction.
- 180° conduction.
- Sinusoidal Pulse Width Modulation.
- Current Source Inverter (CSI).
- Numerical problems.
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