Presentation1

Project Center For Research in Power Electronics and Power Systems

IEEE 2010 , IEEE 2011 BASED PROJECTS FOR  FINAL YEAR STUDENTS OF B.E

Email: [email protected], Cell: +919952749533, +918608603634 www.researchprojects.info OMR, CHENNAI IEEE based Projects For Final year students of B.E inEEE, ECE, EIE,CSEM.E (Power Systems)M.E (Applied Electronics)M.E (Power Electronics)Ph.D Electrical and Electronics.

EXPERT GUIDANCE IN  POWER SYSTEMS & POWER ELECTRONICS

     We provide guidance and codes for the for the following power systems areas.

Deregulated Systems, Wind power Generation and Grid connection

Unit commitment, Economic Dispatch using AI methods

Voltage stability, FLC ControlTransformer Fault IdentificationsSCADA - Power system Automation        we provide guidance and codes

for the for the following power Electronics areas.

   1. Three phase inverter and converters

   2. Buck Boost Converter   3. Matrix Converter   4. Inverter and converter

topologies   5. Fuzzy based control of Electric

Drives.   6. Optimal design of Electrical

Machines   7. BLDC and SR motor Drives

EXPERT SYSTEMS AND SOLUTIONS

Development of Single Development of Single Phase Induction Motor Phase Induction Motor

Adjustable SpeedAdjustable SpeedControl Using AVR Control Using AVR

MicrocontrollerMicrocontroller

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Principle of Speed Control Principle of Speed Control

Front-endC onverter

Inverter

ACinput

D C BusS ingle-Phase

M otor

a

b

c

m ainaux

Block Diagram for Speed Control of Block Diagram for Speed Control of Single Phase Induction Motor Single Phase Induction Motor

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Uncontrolled RectifierUncontrolled Rectifier

Rectification: The process of

converting the alternating voltages and

currents to direct currents.

Rectifier: AC to DC.

IN4008 diodes are used as in this

rectifier

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Circuit Diagram of Uncontrolled Circuit Diagram of Uncontrolled RectifierRectifier

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Step Down Chopper Step Down Chopper CircuitCircuit

Fixed DC Supply to Variable DC Supply

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Chopper ControlChopper Control

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Controlling the voltage level of the dc Link can be done by changing the PWM signal through the microcontroller.

A push button switch is used to increase or decrease the Ton period of a constant frequency pulse.

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PA6 and PA5 are outputs from PA6 and PA5 are outputs from microcontroller.microcontroller.XOR: High frequency of variable width is generated by the microcontroller and the XOR gate.Variable width pulse is applied to the gate of MOSFET through an Opto-coupler

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OptocouplersOptocouplers

LED for emitterAir as barrier for isolationPhototransistor for detectorTransformer is similar, but only for

ACOptocoupler can be used for DC

Inverter:Inverter:In this study two power

electronics switches ( MOSFET’s) have been used to convert the dc to ac voltage.

The frequency is fixed and variable output voltage is obtained by varying the D.C link Voltage by means of the pulse width of the chopper switch.

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Circuit of H Bridge InverterCircuit of H Bridge Inverter

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H bridge operation.H bridge operation. It can be seen from inverter

circuit diagram when T1 and T2 are gated with positive voltage signal, T3 and T4 are OFF by the zero gate voltage signal and vice versa.

The four MOSFET's of T1,T2,T3

and T4 shoud not be Turned ON at the same instant of time.

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PWM SIGNAL PWM SIGNAL GENERATIONGENERATION

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Single-phase induction motorSingle-phase induction motor

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• One stator winding

• Squirrel cage rotor

• 3 to 4 HP applications

• Household appliances: fans, washing machines, dryers

Electromagnetics

Stator

Rotor

Induction motors working

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Electricity supplied to stator

• Magnetic field generated that moves around rotor

• Current induced in rotor

• Rotor produces second magnetic field that opposes stator magnetic field

• Rotor begins to rotate

Speed torque curve SPIM

AVR Microcontroller Groups: The AVR line is divided into to major groups; Tiny and Mega, with some additional special function versions for specific applications such as lighting, automotive, battery management, rf comms, and LCD drivers.Tiny: 1 to 8KB FLASH, 32 to 512 Byte RAM, 0 to 512 Byte EEPROM, 6 yo 18 IO pins.Mega: 4 to 256KB FLASH, 0.5 to 8KB RAM, 1/4 to 4KB EEPROM, 18 to 86 IO pins.

AVR MEGA8535 MicroController RISC core running single cycle

instructions. 32 general purpose registers. On chip hardware includes: Internal oscillators, timers, UART, SPI, USB, pull-up resistors, pulse width modulation, ADC, analog comparator, up to 4x40 LCD drivers and watch-dog timers. On chip in-system programmable Flash and EEPROM. 1.8-5.5 Volt power options. Software controlled frequency and sleep modes with fast wakeup

Advantages of Atmel AVR Cost.

At the moment, the very lowest-price microcontroller available from any manufacturer is the RS 150.

Speed: Not only are most AVRs capable

of 20MHz (even really cheap ones like the ATtiny25/45/85 and ATmega48), but they actually run at near 20 MIPS;

In addition, with the better addressing modes and registers of the AVRs, most operation can be done in only one instruction, where it often takes more than one instruction to do the same thing on a PIC Controller.

Advantages of Atmel AVRPeripherals Many Atmel AVR µcontrollers,

like many Microchip PIC µcontrollers, have a built-in 10 bit ADC. Some have LCD or USB drivers.

Easy ProgrammingAll customizable code written in ANSI-C and thus easier to maintain.Modular concept: easier to integrate into existing designs.Slightly smaller code size in spite of high level language modules.

REFERENCES 1. Correa, M. B. de R, C.B. Jacobina, A.M.N. Lima

and E.R.C. da Silva, 2002. Adjustable-speed single-phase induction motor drive. Applied Power Electronics Conference and Exposition, APEC, Dallas, TX, USA, pp: 770 -776.

2. Jiangmin, Y., 2000. Single phase induction motor adjustable speed control using DSP and microcontroller. Course Project for ECE734 Fall Semester at UW-Madison.

3. Miroslav, C. and A.L. Thomas, 2001. Adjustablespeed single-phase im drive with reduced number of switches. Industry Applications Conference, Conference Record of the IEEE, Chicago, IL, USA, pp: 1800 -1806.

4. Michael, J.J. and J. Michael, 2001. Power Electronics, Principles and Applications. Mc Graw-Hill Inc.