Base on the parameters given, students are to design a model of the boost converter using a simulation software

Project Title

MODELING AND SIMULATION OF DC/DC BOOST CONVERTER

 

Introduction

In many technical applications, it is required to convert a set voltage DC source into a variable-voltage DC output. A DC-DC switching converter converts voltage directly from DC to DC and is simply known as a DC Converter. A DC converter is equivalent to an AC transformer with a continuously variable turns ratio. It can be used to step down or step up a DC voltage source, as a transformer. DC converters are widely used for traction motor control in electric automobiles, trolley cars, marine hoists, forklifts trucks, and mine haulers. They provide high efficiency, good acceleration control and fast dynamic response. They can be used in regenerative braking of DC motors to return energy back into the supply. This attribute results in energy savings for transportation systems with frequent steps. DC converters are used in DC voltage regulators; and also, are used, with an inductor in conjunction, to generate a DC current source, specifically for the current source inverter.

 

Objectives

The switching mode power supply market is flourishing quickly in today’s world. Design engineers aren’t always supplied with the desired amount of voltage they need in order to make their design function properly. Adding an extra voltage supply to a design is not always cost efficient this means that, the design of power converter consumes time with a significant cost. Performance is generally determined after testing converters at normal operating point. This project is proposed to provide the designer with a method of boosting DC converter voltage from 5 Volts to 15 Volts, and to also present the ability to model and simulate the converter by using MATLAB-Simulink/ Multisim

 

Project Description

A boost converter is a DC/DC power converter which steps up voltage from its input (source) to its output (load). In continuous conduction mode (current through the inductor never falls to zero), the theoretical transfer function of the boost converter is:

where D is the duty cycle.

The project is in two phases. The first phase is the method of boosting the DC-DC power converter voltage from 5 Volts to 15 Volts. students are to model the DC-DC power converter with the given parameters and then simulate the model to confirm the out voltage required. In the second phase, students are to redesign the model that can boost 12 Volts to 24 Volts. They are to do that by changing the parameters in other to obtain the output voltage required

In the project phase 1, all the detail parameters are stated below

Input voltage (Vin) = 5 V

Inductance (L) = 870 mH

Capacitance (C) = 2.2mF

Resistance (R) = 750 W 

Diode (D) = D1N4148

MOSFET (M) = IRF 150

What Is Require and Expected From Student

1^ST PRESENTATION

Base on the parameters given, students are to design a model of the boost converter using a simulation software (MATLAB-Simulink/Multisim)

Run the simulation of the designed boost converter and observe waveforms on Scope. Verify that the mean value of the load voltage (Vout) is very close to the theoretical value of: Vout = 5 / (1 - 0.5) = 15 V.

Discuss and analysis your simulation results

Record all results and make a report for first presentation

2^ND PRESENTATION

Progress of work

 

 

3^RD PRESENTATION

 Compute the mathematical model by redesigning the boost converter in project phase 1 to boost from 12 Volts to 24 Volts, showing in details all changing parameters

Using the simulation software (MATLAB-Simulink/Multisim) model the boost converter.

Run the simulation of the redesigned boost converter modeled in (F) and observe waveforms on Scope. Verify that the mean value of the load voltage (Vout) is very close to the theoretical value of: Vout = 12 / (1 - 0.5) = 24 V.

Discuss and analysis your simulation results

Write a full report combining project phase 1 and 2. Record all results and make a final presentation

TERM PROJECT FINAL REPORT 

Your final report should be a more detailed and complete version of the progress report that you submitted previously. You can copy some of the sections of the progress report if there are no changes. You will modify and expand other sections to reflect the modifications/additions you have implemented since your presentation. I need a paper copy of your report as well as an electronic copy.

Introduction 

In this section, you will explain what the project is about. I am specifically interested in where you got the idea from, a brief description of the project and its benefits.

Description of the Device and the Process 

Describe the device you are simulating in detail. If your model involves movement of physical parts, it may be a good idea to provide a diagram, a drawing or a picture of the routes and the processes that the parts go through. Explain the processes involved

Summary of Results 

Provide the big picture in terms of the results you obtained. The discussion in this section should can be quantitative/qualitative. How efficient/profitable is the device? Where are the bottlenecks? How can the system be improved? What are your suggestions, have you simulated any alternatives? If so, what did you find?

Organization and structure 

This section will explain your program structure in detail. You will need to provide a description of the structure of your overall model, how it is partitioned into sub-models and what each sub-model is responsible for.

Changes/Additions made 

Specify changes (if any) that have been made since your previous presentation. Include an explanation of why these changes had to be made.

What kind of additions would you have done (could be done) if you had more time?

 Understandably, you may not have had enough time to do everything that may be done in terms of modeling, analysis and testing of various alternatives. In which direction would you continue if the scope of this project was much larger? This is similar to the future work section that you may see in academic papers or theses.

Detailed Discussion of Results

 Elaborate on the results you obtained providing details that you skipped in the summary. This section should include important quantitative results.

Member participation and Time Management

 Since there will be peer evaluation at the end of the project, it is important for your group to acknowledge what work has been done and who has done it. This will ensure that there is no misunderstanding about the role of the group members. Explain who did what in your team. I also would like you to categorize your work and tell me how much time you have spent on each category. The categories should include data collection, modeling, analysis, etc. Data collection can be divided into manual data collection, obtaining data files from the management, interviewing the workers/managers, etc. Modeling can be divided into Design and Testing. Design can further be divided into sub-model A, sub-model B, etc. This along with the member participation data will help you get a better understanding of who in your team accomplished how much. Remember, how many hours you spend is not as important as how much you get done.

Vout/Vin = 1/(1 D)