Task Summary 

Task 1 (20% of the full mark)

Design of switched-mode power supply.

Design power supply with the following specifications:

Input voltage: 240 V (±5%)

Input frequency: 50 Hz (±10%)

Output voltage: 180 V – 350 V

Output frequency: 50 Hz (±1%)

DC Link voltage: 120V

Output power: 500 Watts

In your design you should cover the following points:

• A flow chart of all your proposed design showing all design steps.
• Block diagram of your proposed design.
• A justification of all values you use in your design. You justification should be based on accurate calculations.

Task 2 (20% of the full mark)

Simulation of the switched-mode power supply of Task 1.

Simulate your designed circuit in Task 1 using OrCAD (PSPICE) or equivalent software (DO NOT use ideal switches in your simulation).

In your simulation you should cover the following points:

• Verification of your design in Task 1.
• Study of all the losses in your simulated circuit. Hence work out the overall efficiency of your power supply.
• Critical comments on any iteration you may carry out between Tasks 1 and 2.
• You may simulate the power supply for different parameters to justify that your design is the optimal one.

Task 3 (20% of the full mark)

Cost analysis and procedure of practical implementation of your design

Based on your design and simulated results in tasks 1 and 2, you need to show all the steps for building your proposed switched-mode power supply.

In this task you should cover the following points:

• Which microcontroller should be used (if any) and why?
• The test procedure of the final product.
• Design-To-Cost analysis of your final product.
• Discussion of the environmental impact of the material used in your design.