Cyclo converter design for hf applications using h-bridge inverter

Name: ASHOK KUMAR C.U. Register No: 11809105005Name: THAMARAICHSELVAN.S Register No: 11809105100

Internal Guide: Mr. MUSTHAFA. PQualification: M.EDesignation: Assistant Professor

External Guide: Mr. SATHISH KUMAR.TQualification: M.E.Designation: Project Team Leader in HAS

Abstract• Designing a Cyclo-converter using Diode rectifier and H-

bridge series resonant inverter.

• Inverter- light weight and reduced the switch count.

• Power electronics switches- MOSFET with a pair of diode in antiparallel.

• Load- RLC for obtaining a resonant frequency

• Control circuit – PIC16F877 microcontroller

• To verify these design- power circuit-MATLAB and control circuit- Keil μversion4 software.

2April 11, 2023 BE - Electrical and Electronics Engineering

Objective of the project “Design a Cyclo-Converter with RLC load” in order to get

multiple output from the single input with reduced switching loss

RLC load- for obtaining a resonant frequency of 30KHz

Voltage and current – Maintaining constant at load

Power factor – unity power factor

April 11, 2023 3BE - Electrical and Electronics Engineering


Existing Cyclo-Converter Circuit Diagram:

A Single input single output(SISO) system is used

April 11, 2023 BE - Electrical and Electronics Engineering 5

Proposed Cyclo-Converter Circuit Diagram

Single input multi output (SIMO) is used with wide range of frequency without switching losses

Comparison Between Proposed And Existing System

S.NO PROPOSED SYSTEM EXISTING SYSTEM

1 Single input multi output (SIMO) is used with wide range of frequency without switching losses

Single input single output(SISO) system is used

2 Obtain a variable frequency and it can be regulate and maintain

Obtain a variable frequency but cannot be regulate and maintain

3 Less physical damage More physical damage

4 RLC load is used Inductive load is used

5 Less harmonic distortion Harmonic distortion is high when compare with proposed system

6 Cost is less Cost is more

7 MOSFET with pair of diode is used to reduced the switching loss

IGBT is used which results is appreciable switching loss

8 Operate at Unity power factor Power Factor may be vary (0.85 to 0.95)


Innovation / Modification


MOSFET with pair of diode is used- high switching speed- to regulate the voltage at load.

High Frequency series resonant bridge inverter is used to convert low frequency to high frequency

PIC16F877 microcontroller – control signal

Modules Involved• Software Required:

- MATLAB7.10a R2010

-Keil μVersion4

• Hardware Required:

- LC filter circuit

- Diode Rectifier

- MOSFET switches

- H-Bridge Series Resonant Inverter

- RLC load

- PIC16F877 microcontroller ( for control Switches)


Modules Explanation

S.NO.

Component Explanations

1 MATLAB/ SIMULINK To design the Cyclo-Converter circuit and to obtain output waveform by simulation

2 Keil Software Simulate the control signal using Microcontroller PIC16F877 by developing C program

3 LC Filter Circuit Generating signals at a particular frequency, or picking out a signal at a particular frequency from a more complex signal

4 Diode Rectifier Act as RC snubber circuit, which is connected between L and C filter circuit

5 MOSFET High commutation speed and good efficiency at low voltages. It shares with the IGBT an isolated gate that makes it easy to drive.

6 H- Bridge series Resonant inverter

The H bridge with a DC supply will generate a square wave voltage waveform across the load


S.No. Component Explanation

7 RLC loadConnected to load for operating under resonant condition. This load is used to find out the resonant frequency of the cycloconverter circuit

8 PIC16F877 microcontroller

Control signal- By developing a C program and simulate using Keil


Contd…

Design Specification Values


Ideal sinusoidal AC Voltage source.

•Peak amplitude (V) : 110V•Frequency : 50Hz•Phase angle (α) : 0•Sample time : 0

Filter Inductance (Ls ) : 1mH

Diode rectifier specification(RC snubber Circuit)

•No. of bridge arm : 2•Snubber resistance : 10kΩ•Snubber capacitance : 1mF

Filter Capacitance - 2μF

H-Bridge Series Resonant Inverter Circuit parameter:(MOSFET )

• FET resistance : 0.1Ω• Internal diode inductance : 0 H• Internal diode resistance : 0.01 Ω• Internal forward voltage : 0 V• Snubber resistance : 10KΩ

RLC circuit Branch• Resistance - 9.5Ω• Indutance - 60µH• Capacitance - 0.45 μF


Design Formulae Used For Cyclo-Converter


;1

)(Im_.6

)(_.5

cos_.4

tan.3

π2

α)Sin(2

π

α1VV

_.2

;

100)(.1

SO

CLjRZpedenceOutput

Z

VoIocurrentOutput

factorpower

R

X

voltageOutput

ToffTonTT

ToncycleDuty


%501002

1

211)()(

;100)(

1)(

1)(

2,1

DutyCycle

msoffTonTTT

onTDutyCycle

msoffT

msonT

QQFor

H-bridge Series Resonant Inverter Design

Branch 1: For Gate signal using MOSFET

;

DESIGN CALCULATION

Q2 Must be Complement of Q1Q2 Must be Complement of Q1

• Branch 2:


%401002

8.0

22.18.0)()(

;100)(

2.1)(

8.0)(

4,3

DutyCycle

msoffTonTTT

onTDutyCycle

msoffT

msonT

QQFor


• Branch 3


%201002

4.0

26.14.0)()(

;100)(

6.1)(

4.0)(

4,3

DutyCycle

msoffTonTTT

onTDutyCycle

msoffT

msonT

QQFor



S .No BRANCH NUMBER

BLOCK NAME

DUTY CYCLE(IN %)

DESIGN LOGIC CIRCUIT

1 BRANCH 1 Q1, Q2 50

2 BRANCH 2 Q3, Q4

40

3 BRANCH 3 Q5,Q6

20

LOGIC DESIGN OF H-BRIDGE SERIES RESONANT INVERTER

• RLC circuit Branch


sec/3^10192

6^1045.06^1060

1

;1

;1

tanRe_tan_

_

rad

LC

CL

ceaccapacitivecereacinductive

resonanceAt

• To find Frequency and Time


sec30000

11

302

3^10192

2

foT

Time

KHzfo

frequency

To determine Output Voltage and Current at load


;2)^1

(2^

);1

(

;

:_

1102

)02sin(01110

π2

α)Sin(2

π

α1VV

_

SO

CLRZ

CLjRZ

Z

VoIo

MeasuredCurrent

VVo

voltageOutput


AIoCurrent

Z

Z

C

C

L

L

FCHLR

125.9

110)(

5.9)(

;2)^57.1152.11(2^5.9

;57.111

;6^1045.0502

11

;52.11

;6^1060502

45.0;60;5.9

Design parameters

Inductive Reactance

Capacitive reactance

Impedence

Contd..

To Compute Power Factor


)(1_

1)3015.0cos(cos_

;3015.05.9

05.0tan

5.9

05.057.1152.11

tan

unityfactorpower

factorpower

R

X

R

X


Simulink Design of Proposed Cyclo-Converter Circuit diagram

Simulink Design Model Of Gate Pulse


Simulation Result Of Input Source


Simulation Result of DC voltage link


Output Voltage at 50% duty cycle At RLC load



SIMULATION RESULT OF GATE PULSE

Output voltage at 40% duty Cycle


Simulation Result of Current Measured at Duty Cycle 40%


Overall Simulation Result


Photographs of Hardware module


RESULTS:

• OUTPUT VOLTAGE = 110V• RESONANT FREQUENCY = 30kHz• TIME DELAY = 0.03ms• OUTPUT CURRENT = 12 A• POWER FACTOR = 1• Total Harmonic Distortion = 0.24% (by MATLAB)


Applications

• High power low speed AC motor drive

• Metal heat treatment • Thermal treatment process such as forging and

casting• Electromagnetic induction based plasma generation

process• High-speed dissolution process for the new materials

and melting process of semiconductor manufacturing


Future Enhancements

• By using Cycloconverter, we can develop using inverter named as Cyclo-inverter for industrial purpose

• By specifying a multi-output series-resonant high frequency inverter, an inverter is obtained fulfilling the requirements


Conclusion

• In this project ,we describes how to design and implement an 3 phase cycloconverter .

• The main objective- To low Frequency AC input into High Frequency AC output

• The main feature of the inverter - reduced switch count and lightweight.

• To overcome -voltage spike and high losses, we are using MOSFET as switching devices.


Base Paper Details

• Cyclo-Converter Type High Frequency Link Inverter For High Frequency Application By Zainal Salam, Nge Chee Lim,


Publication Details

• Paper Published – ICCIAMR 2013 International Conference Vels University , Pallavaram, Chennai


Literature survey• V.K Mehta and R. Mehta, Principles of Electronics(Multicolor Illustrative

Edition),Copy right-2004,2003,2002, S. Chand and Company Ltd, New Delhi. • M. H. Rashid, Power Electronics Circuits, Devices and Application 6th edition,

Copy right 2009, Prentice Hall, Inc Upper Saddle River, NJ. • A. K. Chattopadhyay, ‘‘Cycloconverters and cycloconverter-fed drives—A

Review.’’ J. Indian Inst. Sci.• T. J. Rao, ‘‘Simplified control electronics for a practical cycloconverter.’’ Int. J.

Electronics• B. R. Pelly, Thyristor Phase-Controlled Converters and Cycloconverters, John

Wiley, New York, 1971• J. Davies and P. Simpson, Induction Heating Handbook. New York McCraw

Hill (U.K.) Limited.• Vineeta Agarwal and Sachin Nema, “Resonant AC to AC”, ISIE, 20-23 June,

2005, Vol.2, Dubrovnik, Croatia,


Thank you
