Buck Regulator Half-Bridge PWM Operation
In this lab, students investigate the behavior of MOSFETs when configured as a half-bridge in PWM operation. This circuit element is used in switching power supply applications for high-efficiency DC-DC voltage conversion.
by Dr. Nicola Femia | University of Salerno, and Texas Instruments
This is lab 5 of
12 in the course,
Power Electronics.
LEARNING OBJECTIVES
After completing this lab, students will be able to:
- Given a MOSFET half-bridge, a PWM modulator, a source voltage, and a load resistance, you will calculate the PWM control voltage required to achieve a desired output voltage and the conversion efficiency of the half-bridge in different operating conditions, with specified units and accuracy.
- Given a MOSFET half-bridge, a PWM modulator with a triangular carrier signal and a DC control voltage, you will simulate the half-bridge behavior to verify the consistency of theoretical predictions, by comparing the simulated and the calculated output voltage under the same source voltage and a load resistance conditions.
- Given a real MOSFET half-bridge, a PWM modulator, a DC power supply, a load resistor, and a two channel function generator, you will determine the PWM control voltage needed to achieve a desired output voltage, the duty-cycle, the efficiency and the MOSFET on-state resistance, with specified units and accuracy.
REQUIRED SKILLS
- Basic proficiency using Multisim Live
- Basic proficiency using ELVIS III Instruments
- Basic proficiency in circuits and analog electronics
NI ELVIS III
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
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.
Required Software
Download Academic Software, Learn About Software Licensing- NI ELVIS III Soft Front Panel Support - Install Instructions
- Measurements Live - Access
- Multisim Live (Some circuits require premium access) - Access; Learn about Premium
- TI Power Electronics Board Configuration Utility Download
Required Hardware
Purchase Engineering Education Products- NI ELVIS III - View User Manual & Specifications
- TI Power Electronics Board for NI ELVIS III - View User Manual & Specifications
INSTRUCTOR RESOURCES
Instructor resources are available. Get access
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