A Report On DC 24V 10A power supply Under subject of FINAL YEAR PROJECT B

A Report On
DC 24V 10A power supply
Under subject of
FINAL YEAR PROJECT
B.E.IV, Semester-7
(Electrical Engineering)

Submitted by
Sr. No. Name of Student Enrolment No.

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1. JAYDEEP CHAUDHARY 150030109010
2. DARSHAN TRIVEDI 150033109039
3. SHUBHAM SINGH 150030109069
4. KOMAL PADARIYA 150030109046

Prof. Pratik Munjani Dr. Dharmesh J. Pandya
(Faculty Guide) (Head of Department)

Academic year
(2018)

CANDIDATE’S DECLARATION

We hereby declare that the work presented in the project entitled “DC 24V 10A POWER SUPPLY” submitted towards completion of project in Seventh Semester of B.E. (Electrical) is an authentic record of our original work carried out under the guidance of our faculty.
We have not submitted the matter embodied in this project for the award of any other degree.

Semester: 7th
Place: Rajkot
1. JAYDEEPCHAUDHARY 150030109010
2. DARSHAN TRIVEDI 150034109039
3. SHUBHAM SINGH 150030109069
4. KOMAL PADARIYA 150030109046

ATMIYA
INSTITUTE OF TECHNOLOGY AND SCIENCE
RAJKOT

CERTIFICATE

Date:

This is to certify that the “DC 24V 10A POWER SUPPLY” has been carried out by JAYDEEP CHAUDHARY, DARSHAN TRIVEDI, SHUBHAM SINGH, KOMAL PADARIYA my guidance in fulfillment of the subject FINAL YEAR in ELECTRICAL ENGINEERING (7th Semester) of Gujarat Technological University, Ahmedabad during the academic year 2018.

GUIDE: H.O.D.
Mr. Pratik Munjani Dr.Dharmesh J. Pandya

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ACKNOWLEDGEMENT

We would like to accord our deep gratitude to our project guide prof. Pratik Munjani who has helped us to keep the spirit and we are extremely thankful to them for giving us required guidance. An accretion of this nature could never have been attempted without reference to and inspiration from the works of other whose details are mentioned in reference section. We acknowledge our indebtedness to all of them.

1. JAYDEEP CHAUDHARY 150030109010
2. DARSHAN TRIVEDI 150033109039
3. SHUBHAM SINGH 150030109069
4. KOMAL PADARIYA 150030109046

ABSTRACT

A power supply is a paramount of almost every electronic device and the current is going towards the advancement of these electronic devices. It is thus desirable to also attempt to reduce the size of the power supply and it can be possibly carried out by increasing the power density which can be done by lessening the size of the passive/energy storage components such as the inductors, capacitors and the transformer. The size of these components can also be decreased by increasing the switching frequencies.

Linear power supplies use bulky line frequency transformers and heat sinks and are thus not capable of providing a significant opportunity to reduce their size and weight. Switch Mode Power Supplies SMPS with higher switching frequencies can replaces the bulky line frequency magnetics by smaller high frequency magnetics which are then able to offer significant size and weight reductions. The switching frequency is a deciding factor for for efficiency and size of supplies
Previously, the SMPS were implemented using bipolar power devices and their switching frequency range was limited to a range of a few kHz. It is possible to switch the SMPS from some kHz to a MHz range with the availability of modern and efficient power MOSFET. Also core based transformers were previously used in SMPS. Due to hysteresis and eddy current losses their switching frequency were limited to several hundreds of kHz. Recent research has produced energy efficient PCB transformers which can be implemented in SMPS for power and signal transfer applications, in the MHz frequency range. It is now possible to design high frequency and power efficient isolated converters.

Table of Content

SR. NUM. TOPIC PAGE NO.
1 CERTIFICATE
2 ACKNOWLEDGMENT
3 ABSTRACT
4 TABLE OF CONTENT
5 LIST OF FIGURE
6 INTRODUCTION
7 THEORETICAL BACKGROUND
8 BLOCK DIAGRAM
9 COMPONENTS
10 CIRCUIT DIAGRAM
11 SIMULATION
12 WAVEFORM
13 CALCULATION

List of Figures

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Introduction

A switch mode power supply is an electronic circuit that converts power using switching devices that are turned on and off at high frequencies and storage components such as inductors and capacitors to supply power when the switching device is in its non conduction mode.
They are used in many places. SMPS takes rectified AC input from the wall socket, performs power factor correction and then converts the output into one or more lower voltage DC outputs
Higher power conversion efficiency is an important advantage of SMPS. SMPS may also be smaller and lighter than linear supply due to the smaller transformer size and weight .
Switching regulators are used as replacement of linear regulators when high efficiency and smaller size is required .
A Like other power supplies, an SMPS transfers power from a DC or AC source to DC loads, such as a personal computer, while converting voltage and current characteristics. Unlike a linear power supply, the pass transistor of a switching-mode supply continually switches between low-dissipation, full-on and full-off states, and spends very little time in the high dissipation transitions, which minimizes wasted energy. Voltage regulation is achieved by variation in the ratio of on-to-off time. a linear power supply regulates the output voltage by continually dissipating power in the pass transistor. This higher power conversion efficiency is an important advantage of a switched-mode power supply. Switched-mode power supplies may also be smaller and lighter than a linear supply due to the smaller transformer size and weight.
Switching regulators are instead of linear regulators when higher efficiency, smaller size or lighter weight are required.

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THEORETICAL BACKROUND

POWER SUPPLIES

A power supply is a component or subsystem that converts electrical power from one form to another; commonly from alternating current (AC) utility power to direct current (DC) power. The proper operation of electronic devices ranging from personal computers to military equipment and industrial machinery depends on the performance and reliability of DC power supplies.
Power supplies are circuits that generate a fixed or controllable magnitude dc voltage from the available input voltage. Integrated-circuit (IC) chips used in the electronic circuits need standard dc voltage of fixed magnitude. Many of these circuits need well-regulated dc supply for their proper operation.
Even a commodity switch-mode power supply must be able to survive sudden peaks that far exceed its average operating levels. Engineers designing power supplies or the systems that use them need to understand their supplies behaviour under conditions ranging from quiescent to worst-case.
Today’s power supplies are driving to a level of efficiency never seen before, requiring design engineers to perform numerous specialized power measurements that are time-consuming and complex.

SMPS
The prevailing DC power supply architecture in most modern systems is the Switch-Mode Power Supply (SMPS), which is known for its ability to handle changing loads efficiently. The power signal path of a typical SMPS includes passive, active, and magnetic components. The SMPS minimizes the use of lossy components such as resistors and linear-mode transistors, and emphasizes components that are (ideally) lossless: switch-mode transistors, capacitors, and magnetic.

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