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  1. Home/
  2. Setlem Yogi Venkata Karishma/
  3. Project 2

Project 2

Objective:  Design an interleaving DC/DC converter system for a data centre application with the following specifications: • Input voltage: 45 – 60 v• Output voltage: 3 V• Output current: 100A• Efficiency > 85% (extra credit for efficiency higher than 90% on a spice-based software simulation…

    • Setlem Yogi Venkata Karishma

      updated on 04 Jun 2022

    Objective: 

    Design an interleaving DC/DC converter system for a data centre application with the following specifications:

    • Input voltage: 45 – 60 v
    • Output voltage: 3 V
    • Output current: 100A
    • Efficiency > 85% (extra credit for efficiency higher than 90% on a spice-based software simulation tool)

    Simulate the system using a Spice-based software simulation tool such as LT-Spice, Pspice, PowerSim, TINA, etc...

    Show your design in details (most probably, you will need to use an isolated system to achieve this low voltage conversion ratio, you might also need to use a multiphase system to increase the efficiency).

    Show the input voltage, the output voltage, the input current, the output current, the system efficiency and any other simulation plots necessary to evaluate your design. 

    Solution:

    Given data:

    Input voltage = 45-60V

    Outut Voltage = 3V

    Output Current = 100A

    Efficiency > 85%

    Assumptions:

    Switching Frequency = 20000H

    Duty ratio = 0.5

    Calculations:

    For this design we are using the Forward converter formulas:

    1) Duty cycle:

    Vout/Vi = D.(N2/N1)

    Let's assume that we will design for 50% Duty ratio:

    N2/N1 = 0.1

    These we choose the following:

    N1 = 500

    N2 = 50

    2) Since we choose D = 0.5 then using equation we found that,

    Thus we will choose,

    N3 = 150turns

    3) Now, we will choose an inductor for 40% current ripple:

    4) Now we are calculate the capacitor:

    From all the above all calculations we are model now the interleaving DC/DC converter:

    The recent development of battery powered applications is improving the need of efficient step up dc-dc converters. Now a days step up conversion is widely used in many applications like electrical vehicles, Photovoltaic systems, uninteruptible power supplies and fuel cell systems. By parallelling the converters the input current can be shared among inductors so that high reliability and effcieny in power electronic 

    systems can be obtained. In this paper, the conventonal boost dc-dc converter and interleaved boost dc-dc converter are simulated using matlab/simulink and MULTISIM software.The converters are tested by varying the inout voltage  with a constant dutycycle in continous conduction mode. The performance parameters of the converters are compared. The converters are controlled by interleaved switching signals, which have the same switching frequency but the shift in phase. Using interleaved converter we can get improved efficiency, reduced ripple voltage, reduced inductor current ripple, fast switching speed.

     

    As for high efficiency we used multiphase system to increase the efficiency

    In this model we are using the following parameters which we calculated.

    1) Input Voltage:

    2)Transformer Capacity:

    3) Inductor Value:

    4) Capacitor:

    5) Output Load:

    6) Gate Pulse:

    As we required the 3V so we were given the reference as the constant 3 and PID get the tuned so PID  value are as follows:

    The frequency is choosen is 20000hz:

    Now we run the model for 0.5 sec and get all outputs:

    Output VOltage:

    As we output voltage is getting 3 Volt same as we required with some ripples and ripple also same as we calculated which is shown in the following graph.

    The ripple of output voltage:

    Output Current:

    Current is 100A this is because of the isolated system and multiphase system getting the oerfect as same as requirments:

    Output voltage and current:

    Input Voltage:

    As our input voltage is 60 V given the converter.

    Input current:

    Because of switching action of MOSFET input current is looking like this if Zoon it, it will look like steo voltage which is shown in the following graph

    The current amplitude is max is 10volt and the minimum voltage is near to zero so as calculate the average value then ware getting 4.7A approximately.

    Inductor Voltage:

    Voltage is as pus and magnitude are 2V and -4V.

     

    1. The main aim is to get the efficiency as higher as possible and as ypu see in our requirment are getting approximately same.

    so we can say that our efficiency is above/more than 90%.

    1. As efficiency is calculated from output power/input power so as we calculated for this converter as following:

    Input Voltage = 60V

    Input Current = 5A

    Output Voltage = 3V

    Output Current = 100A
    from all the above data we get the input power is 300w and output power is also 300W

    So our efficiency os 100% without considering the ripple in voltage anf current, if we consider the ripple in voltage and current, if we consider the ripple also we can get the efficiency more than 90%.

    Conclusion:

    Those we designed the DC/DC converter the given data and get the required output with more than 90% efficiency.

     

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    Read more Projects by Setlem Yogi Venkata Karishma (18)

    Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

    Objective:

    Aim: Overview of the Project:  In this project implementing the Code for “Interfacing a 16*2 LCD with two Arduino’s (one for Master and one for Slave) using Inter-Integrated Circuit (I2C) communication protocol” by sending the message to LCD using I2C communication protocol and display the message…

    calendar

    15 Jun 2022 09:49 AM IST

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      Project 2

      Objective:

      Objective:  Design an interleaving DC/DC converter system for a data centre application with the following specifications: • Input voltage: 45 – 60 v• Output voltage: 3 V• Output current: 100A• Efficiency > 85% (extra credit for efficiency higher than 90% on a spice-based software simulation…

      calendar

      04 Jun 2022 09:32 AM IST

        Read more

        Project 1

        Objective:

        Project:1   Choose any three topologies and develop the models in Simulink. The project design report should include the following:1- A Design report to show the reasoning behind your choices of inductance and capacitance levels in your design.2- The full schematics of your converter including gate drivers, PWM chips,…

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        03 Jun 2022 11:36 AM IST

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          Project 2 - Implement the Code for controlling the retraction and extension of Airplane’s landing gear

          Objective:

          Aim:Implement the Code for controlling the retraction and extension of Airplane’s landing gear Overview of the project: In this project, controlling the retraction and extension of Airplane’s landing gear can be implemented using Finite State Machine (FSM). FSM is the most efficient algorithm which is mathematical…

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          25 May 2022 06:57 AM IST

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