Identify and use appropriate analytical methods to evaluate industrial electronic systems. Communicate effectively, using technical report writing skills and selection of appropriate information presentation methods.

Overview

In this coursework you will work through a series of exercises that will lead to the design of a power supply and you will demonstrate them through MATLAB simulations. Throughout the completion of these design and analysis exercises, you will develop skills in dealing with complex problems and providing effective solutions for such problems.

All information required for completion has been provided or covered in module laboratory sessions. You will be expected to perform independent research and further study as appropriate to aid completion. You should write a report based on the requirements of the attached brief and this should be an individual submission. This assessment counts for 50% of the total module marks.

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Module Learning Outcomes

This ICA will assess the following Learning Outcomes as documented in the module specification and handbook:

Personal and Transferrable Skills

 Identify and use appropriate analytical methods to evaluate industrial electronic systems.Communicate effectively, using technical report writing skills and selection of appropriate information presentation methods.

Research, Knowledge, and Cognitive Skills

Produce a specification for an industrial electronic system or industrial electronic product.Describe and explain the operation of simple industrial electronic systems.Demonstrate an understanding of the operating principles of individual components that form an integrated system.

Professional Skills

Examine industrial electronic systems in a practical environment and describe their role within general engineering applications.

AHEP 4 Learning Outcomes

This module assesses the following AHEP4 (Accreditation of Higher Education Programmes) learning outcomes at ISCED (International Standard Classification of Education) level 6.

Research, Knowledge, and Cognitive Skills

Select and apply appropriate computational and analytical techniques to model complex problems, recognising the limitations of the techniques employed (C3).

Personal and Transferrable Skills Development 

Evaluate the environmental and societal impact of solutions to complex problems and minimise adverse impacts (C7).Use practical laboratory and workshop skills to investigate complex problems (C12).Select and apply appropriate materials, equipment, engineering technologies and processes, recognising their limitations (C13).

Professional Skills, Values and Behaviours 

Function effectively as an individual, and as a member or leader of a team (C16).

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Assessment Brief

Introduction

Switching to Electric Vehicles (EV) can effectively contribute to sustainable mobility by making vehicles more energy efficient and reducing greenhouse gas emissions. This shift to electric power can lead to a cleaner environment overall. This assessment focusses on the design and simulation of a power supply system for a 50 kW Electric Vehicle Fast Charging System, incorporating various components and loads as shown in Figure 1.

Figure 1 – Overall System Diagram

The AC supply to the full wave rectifier is 230 V single phase AC at 50Hz.

The loads are as follows:

The output of DC-DC Converter 1 is to be 30 V to power the control system.The output of DC-DC Converter 2 is to be 500 V to charge the batteries of an electric vehicle directly

Activity 1: AC-DC conversion system design (20 %)

You are required to design and simulate an AC-DC conversion system for a 50 kW EV Fast Charging System. The system is powered by a 230 V single phase AC supply at 50 Hz.

Rectifier Design Design and simulate a full wave rectifier for this system. You may assume that:

The load resistance, R, is 3 Ω.The load inductance, L, is 50 mH.The source resistance, RS, is 2 mΩ. •

The source inductance, LS, is 60 µH. Your design report should include the following:

1. Identification of key parameters for the selection of the diodes to be used and specifications for their values.

2. A simulation to validate the operation of the circuit, presented with appropriate graphs.

3. Explanation of your choice of filter components you would use to design a filter to smooth the rectified output.

4. A summary of the performance of this rectifier to include the form factor and efficiency, including comments on these values and their significance.

Activity 2: DC-DC Converter 1 Design (25%)

Design a DC-DC converter to provide a stable 30 V to power the control system with minimal voltage ripple. Since this circuit will supply the control system you should ensure the output voltage ripple does not exceed 5% of the output voltage.

Your design work should include:

1. Calculation of the DC input voltage based on the output of the rectifier.

2. Selection of appropriate values of the inductor L and Capacitor C.

3. Determination of a suitable switching frequency.

4. Justifications with design calculations and appropriate explanation.

5. Simulation of the circuit and presentation of the results to demonstrate its performance.

6. Description of any significant consideration for the selection of the components.

Activity 3: DC-DC Converter 2 Design (25%)

Design a DC-DC converter to provide a stable 500 V output for charging the batteries of an EV. The output voltage ripple must not exceed 10% of the output voltage.

Your design work should include:

1. Identification of the type of converter required.

2. Calculation of appropriate component values.

3. Determination of a suitable switching frequency.

4. Justifications with design calculations and appropriate explanation.

5. Simulation of the circuit and presentation of the results to demonstrate its performance.

6. Description of any significant considerations for the selection of the components.

Activity 4: Simulation of Entire System (20%)

Integrate the individual models you have created above and simulate the performance of the integrated system. The nature of EV charging is that the amount of current delivered to the battery is regulated by the EV’s onboard system. You should therefore investigate the behaviour of the charging system at a range of power settings, ranging from 10 kW to 50 kW.

You should provide results and commentary related to:

1. Evaluation of the overall efficiency of the system across the specified range of outputs.

2. Analysis of the harmonic content of the input current drawn from the supply.

3. Calculation of the power factor of the system.

4. Evaluation of the system based on the above and any other relevant factors you wish to consider, to include any recommendations for how the system could be improved.

Activity 5: Application of Embedded Systems in Industrial Electronics (10%)

Based on your design and simulation on the demonstration of the power electronic converters, answer the following questions:

1. Provide a general definition for embedded systems. Using an appropriate schematic, identify the core components of an embedded system linked to each other.

2. List and explain common types of embedded systems that are categorised based on their functional requirements.

3. Explain how an embedded system facilitates the implementation of the control unit of a power converte