Power Electronics

This manual provides a guidance to a comprehensive hands-on learning experience on fundamentals of Power Electronics, tailored for Electrical Engineering and Electrical and Computer Engineering Undergraduate Programs. The laboratories are connected each other, forming four groups, which cover the fundamentals of DC-DC linear regulators, DC-DC buck regulators, DC-AC inverters, and AC-DC rectifiers. Each group of laboratories is performed by means of dedicated Multisim Live circuit schematics for simulations, and a dedicated section of the TI Power Electronics Board for experimental measurements.
by Dr. Nicola Femia | University of Salerno, and Texas Instruments
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A limited number of labs are currently available.  Check back soon for more.

 

LEARNING OBJECTIVES

 

  • Given a linear regulator, with specified components characteristics, the student will be able to analyze and predict its behavior, under DC and AC operating conditions, in open-loop and closed-loop operation, by determining the values of voltages and currents of interest to evaluate static and dynamic performances, with specified units and accuracy.
  • Given a buck regulator, with specified components characteristics, the student will be able to analyze and predict its behavior, under DC and AC operating conditions, in open-loop and closed-loop operation, in continuous and discontinuous mode, by determining the values of voltages and currents of interest to evaluate the static and dynamic performances, with specified units and accuracy.
  • Given a DC-AC pulse width modulated inverter, with specified components characteristics and modulation signals, the student will be able to analyze and predict its behavior, under different load impedance conditions, by determining the amplitude of output current and voltage AC components, with specified units and accuracy.
  • Given a high-frequency transformer and a square-wave inverter, with specified components characteristics and modulation signals, the student will be able to analyze and predict its behavior, under different coils configurations, by determining the amplitude of input and output current and voltage AC components, with specified units and accuracy.
  • Given an AC-DC rectifier, with specified components characteristics, the student will be able to analyze and predict its behavior, under different input inductance and output capacitance conditions, by determining the amplitude of output current and voltage DC and AC components, with specified units and accuracy.
  • Given a system comprises of a AC-DC rectifier with buck and linear post-regulators, with specified characteristics, the student will be able to analyze and predict the behavior of the system, under different operating conditions, by determining the amplitude of input and output current and voltage DC and AC components of each stage, with specified units and accuracy.

 

COURSE ALIGNMENT

 
Level Undergraduate
Topic Power Electronics
Style Laboratory
Prerequisite Skills Introductory circuits and semiconductor experience
Basic proficiency with oscilloscopes

INCLUDED COURSE LABS

The goal of this lab is to investigate the properties of a MOSFET in DC operation, when it works as a pass device in linear regulators. First, we review the equations describing the behavior of a MOSFET in DC operation, and discuss the impact of the gate-to-source voltage on the operating point. Next, we predict the MOSFET operating region and calculate the power losses and temperature under different conditions. Then, we simulate the MOSFET using its physical model. Finally, we perform lab experiments to estimate the real value of MOSFET parameters and compare their impact on the accuracy of theoretical and simulation predictions.
In this lab, students will investigate the MOSFET in AC operation which are of interest in linear regulators applications. First, the student will review the equations describing the MOSFET behavior in an AC operation and then use a model to analyze and predict the sensitivity of the output voltage from a gate driver voltage at different frequencies. Students will simulate the response using Multisim Live and take measurements. Students will compare the measured result with, simulation and theoretical. Throughout the lab, students will answer short questions to confirm their understanding of the topic.
In this lab, students will investigate the properties and response of the error amplifier which is generated by the MOSFET gate driver in a linear regulator. First, students will review the architecture and the simplified equations describing the error amplifier in DC and AC operation. Students will use the simplified model to analyze and predict the AC gain. Next, students will simulate the response of the error amplifier to the perturbations of the output voltage with respect to the desired nominal value in a regulator. Finally, they will perform experimental test with a real amplifier to compare the results with simulation. Throughout the lab, students will be answering short questions to verify their understanding.
The goal of this lab is to analyze the closed loop operation of a linear regulator. We investigate the impact of the loop gain on the ability to reject noise and changes in the output voltage, which is the most important feature of linear regulators. First, we will review the principle of operation and the simplified model of a closed loop linear regulator. Next, we will use the simplified model to predict its response to AC perturbations and its accuracy to the reference signal. Then, we will simulate the linear regulator in DC and AC operation to evaluate the impact of the MOSFET and error amplifier parameters. Finally, we will perform experimental tests with a real linear regulator, and will compare the results of simulations and measurements to verify their consistency.
The lab investigates the operation MOSFETs as switches, implementing the half-bridge used in buck regulator to convert a given DC input voltage into a lower DC output voltage. Coming Soon
The lab investigates the operation of the L-C filter used to remove the high-frequency AC component generated by the MOSFET half-bridge of a buck regulator. Coming Soon.
The lab investigates the impact of a MOSFET-diode half-bridge on the operation of a buck regulator. Coming soon.
The lab investigates the impact of the closed loop feedback control on the capability of the buck regulator of maintaining the output voltage well regulated. Coming soon.
The lab investigates the operation of a MOSFETs full-bridge, driven by a sinusoidal pulsed width modulation, under different load impedance conditions. Coming Soon.
The lab investigates the operation of a high-frequency transformer under square-wave voltage generated by a MOSFET full-bridge DC-AC inverter. Coming soon.
The lab investigates the operation of a single-phase diode full-bridge rectifier, under different input inductance and output capacitance conditions. Coming Soon.
The lab investigates the operation of a system comprised of an AC-DC diode rectifier with a cascade of buck and linear post-regulators. Coming soon.

NI ELVIS III

Engineering laboratory solution for project-based learning that combines instrumentation and embedded design with a web-driven experience, delivering a greater understanding of engineering fundamentals and system design.

TI Power Electronics Board for NI ELVIS III

Application board for NI ELVIS III which provides a hands-on approach to power electronics using functional blocks and TI circuits to understand each component in a power electronics system.

Multisim Live

Multisim Live is an online, touch-optimized component of Multisim, so students can design and simulate their circuits anywhere, anytime, on any device.

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