Overview
Things
Story

Step 1: Get the Components
Step 2: Build Your Circuit
Step 3: Upload the Code

Published June 10, 2019 © CC BY-SA

SPEIC Converter

The project below is a SPEIC converter which is a non-inverting buck/boost converter that steps up and down the voltage.

IntermediateWork in progress5 hours646

Things used in this project

Hardware components

Power Mosfet: IRF720.

Single Turn Potentiometer- 100k ohms

Capacitors: 470 uF and 100uF.

Software apps and online services

MATLAB

Arduino IDE

Hand tools and fabrication machines

Laser cutter (generic)

Soldering iron (generic)

Story

The project below is a SPEIC converter which is a non-inverting buck/boost converter that steps up and down the voltage.

The system will allow the user to adjust the output to a desired value; the closed loop control system will stabilize this value despite changing both load and input voltage values.

This project is an implementation of a design Abdelrahman Sada worked on using MATLAB-Simulink.

Specifications of the design:

Frequency=10 KHz.
Input voltage= 3-30V.
Output Voltage=0-25V.
Maximum current= 1A.

This project is done by our intern: Abderahman Sada.
For more information:abedsada@gmail.com

Step 1: Get the Components

In case you want to make your own a SPEIC, you'll need the following:

Power Mosfet:IRF720.
P-channel: ZVP2106A.
N-channel 820K.
Potentiometer.
Capacitors: 470 uF and 100uF.
Diode
Inductors:2x100UH.
Arduino UNO.
2xScrew Terminal.
Heat Sink.

Step 2: Build Your Circuit

We recommend building it in a breadboard at the beginning and after finishing all the steps, solder it through a strip-board.

Also mounting Power Mosfet on a Heat Sink is a good idea.

Step 3: Upload the Code

Upload the code using Arduino IDE.

Once the upload is finished go to Tools then Serial Plotter, from this screen you can see the Output Voltage, which can be adjusted using the potentiometer after connecting the circuit to the source.

Before uploading makes sure you have the following libraries:

1. PWM library: you can add it from sketch, include library, add ZIP library (PWM-Master.zip).

2. PID controller library: you can add it from sketch, include library, manage libraries, find it, and install it.

References:

1. https://forum.arduino.cc/index.php?topic=448414.0

2. https://www.instructables.com/id/DIY-BuckBoost-Converter-Flyback/

Code

Digital DC - DC converter

#include <PWM.h>
#include <PIDController.h>

PIDController pid;
int PWMPIN = 9;
int32_t frequency = 10000;
float m = 97/15;
// *  * * * * * * * *   * * *

double Feed = 0;         // variable to store the read value
int PWM = 230;
int constant = 7;
double kP = 0.2;
double kI = 1;

void setup()
{
  pinMode(A0, INPUT);
  pinMode(A1, INPUT);

  InitTimersSafe();
  bool success = SetPinFrequencySafe(PWMPIN, frequency);
  Serial.begin(9600);
  pid.begin();
}

void loop()
{

  constant = map(analogRead(A0), 0, 1023, 0, 25);
  //constant=8;
  pid.setpoint(constant);
  pid.tune(kP, kI, 0);
  pid.limit(0, 255);

  Feed = analogRead(A1);
  Feed = Feed * 5 / 1023;
  Feed = Feed * m;
  //Serial.print("Feed:");
  double output = pid.compute(Feed);
  output = 255 - output;

  //Serial.print("PWM:");
  //Serial.println(constant);
  pwmWrite(PWMPIN, output);
  Serial.println(Feed);


}

Credits

Fablab_Irbid

6 projects • 32 followers

Contact

Thanks to Abelrahman Sada .

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SPEIC Converter