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Cyclo converter design for hf applications using h-bridge inverter

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ASHOK KUMAR C U, S THAMARAICHSELVAN Mr. SATISH KUMAR T , Mr. MUSTHAFA P

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Cyclo converter design for hf applications using h-bridge inverter

  1. 1. Name: ASHOK KUMAR C.U. Register No: 11809105005 Name: THAMARAICHSELVAN.S Register No: 11809105100Internal Guide: Mr. MUSTHAFA. P External Guide: Mr. SATHISH KUMAR.TQualification: M.E Qualification: M.E.Designation: Assistant Professor Designation: Project Team Leader in HAS
  2. 2. 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.April 11, 2013 BE - Electrical and Electronics Engineering 2
  3. 3. 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 factorApril 11, 2013 BE - Electrical and Electronics Engineering 3
  4. 4. Existing Cyclo-Converter Circuit Diagram: A Single input single output(SISO) system is usedApril 11, 2013 BE - Electrical and Electronics Engineering 4
  5. 5. Proposed Cyclo-Converter Circuit Diagram Single input multi output (SIMO) is used with wide range of frequency without switching lossesApril 11, 2013 BE - Electrical and Electronics Engineering 5
  6. 6. Comparison Between Proposed And Existing SystemS.NO PROPOSED SYSTEM EXISTING SYSTEM1 Single input multi output (SIMO) is Single input single output(SISO) system used with wide range of frequency is used without switching losses2 Obtain a variable frequency and it Obtain a variable frequency but cannot can be regulate and maintain be regulate and maintain3 Less physical damage More physical damage4 RLC load is used Inductive load is used5 Less harmonic distortion Harmonic distortion is high when compare with proposed system6 Cost is less Cost is more7 MOSFET with pair of diode is used IGBT is used which results is to reduced the switching loss appreciable switching loss8 Operate at Unity power factor Power Factor may be vary (0.85 to 0.95)April 11, 2013 BE - Electrical and Electronics Engineering 6
  7. 7. Innovation / Modification MOSFET with pair of diode is used- highswitching speed- to regulate the voltage at load.High Frequency series resonant bridge inverteris used to convert low frequency to high frequencyPIC16F877 microcontroller – control signalApril 11, 2013 BE - Electrical and Electronics Engineering 7
  8. 8. 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)April 11, 2013 BE - Electrical and Electronics Engineering 8
  9. 9. 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 The H bridge with a DC supply will generate a Resonant inverter square wave voltage waveform across the loadApril 11, 2013 BE - Electrical and Electronics Engineering 9
  10. 10. Contd… S.No. Component Explanation Connected to load for operating under resonant 7 RLC load condition. This load is used to find out the resonant frequency of the cycloconverter circuit 8 PIC16F877 Control signal- By developing a C program and simulate microcontroller using KeilApril 11, 2013 BE - Electrical and Electronics Engineering 10
  11. 11. 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 : 1mFApril 11, 2013 BE - Electrical and Electronics Engineering 11
  12. 12.  Filter Capacitance - 2μF  H-Bridge Series Resonant Inverter Circuit parameter:(MOSFET ) • FET resistance : 0.1Ω • Internal diode inductance :0H • Internal diode resistance : 0.01 Ω • Internal forward voltage :0V • Snubber resistance : 10KΩ  RLC circuit Branch • Resistance - 9.5Ω • Indutance - 60µH • Capacitance - 0.45 μFApril 11, 2013 BE - Electrical and Electronics Engineering 12
  13. 13. Design Formulae Used For Cyclo-Converter Ton 1.Duty −cycle(γ ) = ×100 T T = Ton + Toff ; 2.Output _ voltage α Sin(2 α) VO = VS 1 − + π 2π X  3.θ = tan   R 4. power _ factor = cos θ Vo 5.Output _ current ( Io) = Z  1  6.Output _ Im pedence( Z ) = R + j ωL − ;  ωC April 11, 2013 BE - Electrical and Electronics Engineering 13
  14. 14. DESIGN CALCULATIONH-bridge Series Resonant Inverter DesignBranch 1: For Gate signal using MOSFET For → 1, Q 2  Q T (on) =1ms T (off ) =1ms T (on) DutyCycle = ×100; T T =T (on) +T (off ) =1 +1 = 2ms 1 DutyCycle = ×100 = 50% 2 ; Q2 Must be Complement of Q1 Q2 Must be Complement of Q1 April 11, 2013 BE - Electrical and Electronics Engineering 14
  15. 15. • Branch 2:For  →Q3, Q 4 T (on) = 0.8msT (off ) = 1.2ms T (on)DutyCycle = ×100; TT = T (on) + T (off ) = 0.8 +1.2 = 2ms 0.8DutyCycle = ×100 = 40% 2 Q3 Must be Complement of Q4 Q3 Must be Complement of Q4April 11, 2013 BE - Electrical and Electronics Engineering 15
  16. 16. • Branch 3For  →Q3, Q 4 T (on) = 0.4msT (off ) = 1.6ms T (on)DutyCycle = ×100; TT = T (on) + T (off ) = 0.4 +1.6 = 2ms 0.4DutyCycle = ×100 = 20% 2 Q5 Must be Complement of Q6 Q5 Must be Complement of Q6April 11, 2013 BE - Electrical and Electronics Engineering 16
  17. 17. LOGIC DESIGN OF H-BRIDGE SERIES RESONANT INVERTER S .No BRANCH BLOCK DUTY DESIGN LOGIC CIRCUIT NUMBER NAME CYCLE (IN %) 1 BRANCH 1 Q1, Q2 50 2 BRANCH 2 Q3, Q4 40 3 BRANCH 3 Q5,Q6 20April 11, 2013 BE - Electrical and Electronics Engineering 17
  18. 18. • RLC circuit Branch At _ resonance inductive _ reac tan ce = capacitive _ Re ac tan ce 1 ωL = ; ωC 1 ω= ; LC 1 = 60 × 10^ −6 × 0.45 × 10^ −6 ω = 192 × 10^3rad / secApril 11, 2013 BE - Electrical and Electronics Engineering 18
  19. 19. • To find Frequency and Time frequency ω 192 × ^3 10 fo = = =30 KHz 2π 2π Time 1 1 T = = sec fo 30000April 11, 2013 BE - Electrical and Electronics Engineering 19
  20. 20. To determine Output Voltage and Current at load Output _ voltage α Sin(2 α) 0 sin( 2 ×0) VO = VS 1 − + =110 1 − + π 2π π 2π Vo =110V Current _ Measured : Vo Io = ; Z 1 Z = R + j (ωL − ); ωC 1 Z = R ^ 2 + (ωL − )^ 2; ωCApril 11, 2013 BE - Electrical and Electronics Engineering 20
  21. 21. R = 9.5Ω; L = 60 µH ; C = 0.45µF Contd.. Design parameters Inductive Reactance ωL = 2π ×50 ×60 ×10^ −6; ωL =11.52Ω; 1 1 Capacitive reactance = ; ωC 2π ×50 ×0.45 ×10^ −6 1 =11.57Ω; ωC Impedence Z = 9.5^ 2 + (11.52 −11.57)^ 2 ; ( Z ) = 9.5Ω 110 Current ( Io) = =12 A 9.5April 11, 2013 BE - Electrical and Electronics Engineering 21
  22. 22. To Compute Power Factor X θ = tan   R X = 11.52 − 11.57 = −0.05Ω R = 9.5Ω  − 0.05  θ = tan   = −0.3015;  9.5  power _ factor = cos θ = cos(−0.3015) = 1 power _ factor = 1(unity )April 11, 2013 BE - Electrical and Electronics Engineering 22
  23. 23. Simulink Design of Proposed Cyclo-Converter Circuit diagramApril 11, 2013 BE - Electrical and Electronics Engineering 23
  24. 24. Simulink Design Model Of Gate PulseApril 11, 2013 BE - Electrical and Electronics Engineering 24
  25. 25. Simulation Result Of Input SourceApril 11, 2013 BE - Electrical and Electronics Engineering 25
  26. 26. Simulation Result of DC voltage linkApril 11, 2013 BE - Electrical and Electronics Engineering 26
  27. 27. Output Voltage at 50% duty cycle At RLC loadApril 11, 2013 BE - Electrical and Electronics Engineering 27
  28. 28. SIMULATION RESULT OF GATE PULSEApril 11, 2013 BE - Electrical and Electronics Engineering 28
  29. 29. Output voltage at 40% duty CycleApril 11, 2013 BE - Electrical and Electronics Engineering 29
  30. 30. Simulation Result of Current Measured at Duty Cycle 40%April 11, 2013 BE - Electrical and Electronics Engineering 30
  31. 31. Overall Simulation ResultApril 11, 2013 BE - Electrical and Electronics Engineering 31
  32. 32. Photographs of Hardware moduleApril 11, 2013 BE - Electrical and Electronics Engineering 32
  33. 33. 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)April 11, 2013 BE - Electrical and Electronics Engineering 33
  34. 34. 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 manufacturingApril 11, 2013 BE - Electrical and Electronics Engineering 34
  35. 35. 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 requirementsApril 11, 2013 BE - Electrical and Electronics Engineering 35
  36. 36. 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.April 11, 2013 BE - Electrical and Electronics Engineering 36
  37. 37. Base Paper Details • Cyclo-Converter Type High Frequency Link Inverter For High Frequency Application By Zainal Salam, Nge Chee Lim,April 11, 2013 BE - Electrical and Electronics Engineering 37
  38. 38. Publication Details• Paper Published – ICCIAMR 2013 International Conference Vels University , Pallavaram, ChennaiApril 11, 2013 BE - Electrical and Electronics Engineering 38
  39. 39. 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,April 11, 2013 BE - Electrical and Electronics Engineering 39
  40. 40. Thank youApril 11, 2013 BE - Electrical and Electronics Engineering 40

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