The experiments conducted within the scope of ELK 342 and ELK 342E Power Electronics Laboratory courses aim to enable students to become familiar with semiconductor switching devices, analyze fundamental power converter topologies, and validate their theoretical knowledge on physical circuits. In our laboratory, equipped with modern measurement instruments and dedicated experimental setups, students are provided with an application-oriented engineering education experience aligned with professional practice.

1. Single-Phase Uncontrolled and Controlled Rectifiers

Investigation of characteristic waveforms of diode and thyristor rectifier structures under different load (R, RL) and filtering conditions.

2. DC-DC Converters (Buck and Boost)

PWM control, CCM/DCM operating modes, and parameter analysis in step-down (Buck) and step-up (Boost) chopper circuits.

3. Phase-Controlled Single-Phase AC Choppers

Firing angle control in AC chopper circuits, harmonic analysis, and observation of effects on lamp/motor loads.

4. Control of a Three-Phase Induction Motor Using VFD

V/f (scalar) speed control applications in induction motors using Variable Frequency Drives (VFD) and inverter structures.

5. Diode and Thyristor (SCR) Characterization

Experimental analysis of forward and reverse bias characteristics of diodes and blocking/latching behavior of SCR devices.

6. MOSFET and IGBT Switching Tests

Determination of threshold voltages of power MOSFET and IGBT devices, investigation of Miller capacitance effects, and comparison of dynamic switching performances.

⚠️ Experiment Preparation and Implementation Principles

• Preliminary Preparation: The experiment manual must be read and the section “Concepts to Be Known Before the Experiment” must be studied.
• Visual Materials: Educational content on our Video Gallery page and relevant technical videos on the ITU Power Electronics YouTube channel should be watched as pre-experiment preparation material.
• Safety: Since high voltage is involved, energizing procedures must be carried out strictly under the supervision of the responsible research assistant.

📋 Report Preparation and Evaluation

Reports to be prepared individually after each experiment must include:

• Technical Analysis: Interpretation of measurements and waveforms.
• Simulation: PSIM/MATLAB/PSpice modeling and comparative analysis.
• Engineering Evaluation: Analysis of differences between theoretical and practical results.