Main Features, Wide input range Characteristics (+- 50%) High Gain (12), High Efficiency(80% above) Less THD (Below 3%) Reduced number of inverter switches Low value of LC filter are the main features. In Normal boost converters gives gain up to 3. And if we are using transformers, the efficiency will be very less due to leakage reluctance. For normal 5 Level converter we need 2 supply source and 8 switches. Proposed design uses 5 Switches for 5 Level Inverter. Which reduces the switching loss & coupled Inductor with charge pump to get high gain with high efficiency. Also we used sine PWM switching at a frequency of 20KHz, hence the major harmonics are eliminated, and only presents very high harmonics in the order of Khz. These harmonics is removed using a small value of LC low pass filter.

1. Tribute to the great Scientist
Nikola Tesla

2. Presented By
JIBIN JOHN
RANJITH TR
SUJITH MK
SUDHEER PC
UNNIKRISHNAN A
HIGH EFFICIENCY DC-DC
CONVERTER FED FIVE LEVEL
INVERTER
Project Guide
TG SANISH KUMAR
Associate Professor
EEE Department

3. 1. Why High efficiency Inverter system
2. Wide input high efficiency high step-up Dc- Dc Converter
o Modes of operation
3. Reduced switch 5 level inverter
o Modes of operation
4. Integrated inverter system with high efficiency converter
o Simulation diagram
o Simulation result
o Analysis
5. Hardware Implementation
o Schematic Diagram
o Top view of PCB
o Hardware Result
6. Conclusion and future scope
7/9/2016 3

4. 7/9/2016 4
WHY HIGH EFFICIENCY
INVERTER SYSTEM
 Energy plays a pivotal role in our life daily activities.
 Energy demand is increasing day be day due to increase in population
urbanization and industrialization
 The worlds fossil fuel supply will thus depleted in a few hundred years
 Result will be inflation and energy shortage
 Hence we the engineers have to take the responsibility to use the
renewable source in efficient manner
 For this Efficient power converts has an important role

5. WIDE INPUT
HIGH EFFICIENY & HIGH STEP-UP
DC-DC CONVERTER
Features
 Combining boost, fly-back &
charge pump circuits.
 Wide input range
 High Voltage gain (2.9 to 10 times)
 High Efficiency( up to 95%)
 Low cost
 Best suitable for renewable energy
sources
7/9/2016 5

6. MODES OF OPERATION
7/9/2016 6
Mode.1 ( t0 to t1) Mode.2 ( t1 to t2)
Mode.3 ( t2 to t3) Mode.4 ( t3 to t4) Mode.5 ( t4 to t5)

7. 7/9/2016 7
Mode.4 ( t3 to t4)
To reduce the inrush current
of the charge pump current loop
WIDE INPUT HIGH EFFICIENCY
HIGH STEPUP DC-DC CONVERTER

8. SIMULATION DIAGRAM OF
WIDE INPUT HIGH EFFICIENCY AND HIGH STEPUP DC-DC
CONVERTER
7/9/2016 8

9. SIMULATION REULT OF
WIDE INPUT HIGH-EFFICIENCY HIGH-STEPUP DC-DC
CONVERTER
Duty ratio = 70% Duty ratio = 90%

10. REDUCED SWITCH 5 LEVEL INVERTER
7/9/2016 10

11. FEATURES
 Sine PWM inverter topology
 Dual reference modulation technique
 One Full bridge inverter and
auxiliary circuit with 4 diodes and 1
switch
 Produce +Vdc/2, +Vd, 0V, -Vd/2
and –Vd
 Improved Output Waveform
 Smaller filter size
 Smaller EMI and THD
7/9/2016 11

12. Modes of operation
S2 S3 S4 S5 S6 Vout
ON OFF OFF OFF ON +Vdc/2
OFF ON OFF OFF ON +Vdc
OFF
OFF or
(ON)
ON or
(OFF)
OFF or
(ON)
ON or
(OFF)
0
ON OFF OFF ON OFF -Vdc/2
OFF OFF ON ON OFF -Vdc
MODE 21345
7/9/2016 12

13. Dual Reference
Sine PWM Switching
7/9/2016 13

14. SIMULATION DIAGRAM
7/9/2016 14

15. SIMULATION RESULTS
Under modulated
Switching (Ma<0.5)
Linearly modulated
Switching (1<Ma<0.5)
Over modulated
Switching (Ma>1.5)
7/9/2016 15

16. SWITCHING
7/9/2016 16

17. Without Filter
With L filter
With LC filter
7/9/2016 17

18. HIGH EFFICIENCY CONVERTER + 5 LEVEL INVERTER
7/9/2016 18

19. SIMULATION RESULT
7/9/2016 19
THD = 1.346%

20. ANALYSIS ON SIMULATION RESULTS
Switching
Frequency
(Hz)
Duty
Ratio
Load Vdc
(Avg)
I in (Avg)
Input
power
V out (Avg) I out (Avg) Pout power
Voltage
Gain
% µ
R
CONVERTER
16000 70%
1000 30 1.39 41.73 173.5 0.17 30.1 5.78 72%
600 30 1.54 45.43 146 0.24 35.55 4.87 78%
500 30 1.60 47.81 138.6 0.28 38.36 4.62 80%
400 30 1.74 52.17 131.2 0.33 43.04 4.37 82%
250 30 2.50 74.74 127.8 0.51 65.31 4.26 87%
200 30 3.04 91.18 127.6 0.64 81.42 4.25 89%
100 30 5.75 172.7 126.5 1.26 160.1 4.22 93%
INVERTER
Hc =20 KHz
& Href =
50Hz
70%
1000 200 0.10 19.13 104.17 0.10 13.11 0.52 69%
500 200 0.19 37.81 120.8 0.24 25.19 0.60 67%
300 200 0.29 57.83 121.4 0.40 42.12 0.61 73%
200 200 0.40 79.34 118 0.59 64.54 0.59 81%
CONVERTER + INVERTER
70%
500 30 1.37 41.05 110.4 0.22 21.05 3.68 51%
300 30 1.44 43.07 88.26 0.29 26.23 2.94 61%
200 30 1.55 46.41 82.61 0.41 35.62 2.75 77%
100 30 2.06 60.65 70.37 0.70 50.44 2.35 83%

21. WIDE INPUT CHARACTERISTICS ANALYSIS USING
SIMULATION
Load
V in I in Pin Vout I out P out V gain % µ
(R)
CONVERTER
200.0
20.0 3.8 75.6 117.6 0.6 69.2 5.9 92%
70.0 13.4 938.4 417.7 2.1 872.3 6.0 93%
100.0
20.0 7.2 144.2 116.9 1.7 136.5 5.8 95%
70.0 25.6 1790.0 415.0 4.5 1721.0 5.9 96%
CONVERTER + INVERTER
500.0
20.0 1.0 19.2 80.3 0.2 13.0 4.0 68%
70.0 3.4 235.9 284.6 0.6 162.0 4.1 69%
100.0
20.0 2.5 49.9 63.0 0.6 38.6 3.2 77%
70.0 8.9 624.0 222.3 2.2 494.3 3.2 79%

22. HARDWARE IMPLEMENTATION
7/9/2016 22
SCHEMATIC

23. RESULTS
7/9/2016 23
Gate pulse to
S2
Gate pulse to
S3
Gate pulse to
S4
Gate pulse to
S5
Gate pulse to
S6

24. 7/9/2016 24
5 LEVEL OUPUT
Expected wave

25. CONCLUSION
 Circuit Provides minimum THD (1.3% to 4.0% )
 High Voltage gain about 2.5 to 10 times by keeping high efficiency
 Providing wide input range characteristics
 The converter circuit recovers leakage inductance energy.
 The reduced switch multilevel inverter used 3 switches lesser than conventional
topology
 Switching losses comparatively lesser because of reduced switches and two
switches triggering with standard frequency
 The switching signals are generated with the help of microcontroller
dsPIC30F2010
 Integration of converter with inverter provides high amplified output with lesser
THD and High efficiency about 80% and above

26. 1. TOMASZUK_ and A. KRUPA, “ High efficiency high step-up DC/DC converters – a review,” Bulleti of the polish
academy of sciences technical science, Vol. 59, No. 4, 2011
2. W. Yu, C. Hutchens, J.-S. Lai, J. Zhang, G. Lisi, A. Djabbari, G. Smith, and T. Hegarty, “High efficiency converter
with charge pump and coupled inductor for wide input photovoltaic AC module applications”, Energy Conversion
Congress and Exposition (ECCE) IEEE 1, 3895–3900 (2009).
3. S. J. Park, F. S. Kang, M. H. Lee, C. U. Kim, “A New Single-Phase Five-Level PWM Inverter Employing a Deadbeat
Control Scheme,” IEEE Trans. Power Electronics., vol. 18, no. 18, pp. 831-843, May. 2003.
4. Muhammad H. Rashid, Power electronics: Circuits, Devices, and Applications, 3rd ed. Pearson Prentice Hall, 2004,
pp.267.
5. Janyavula Deepthi and Dr S N Saxena, “Study of Variation of THD in a Diode Clamped Multilevel Inverter with
respect to Modulation Index” , 2nd International Conference and workshop on Emerging Trends in Technology
(ICWET) , International Journal of Computer Applications® (IJCA),2011
6. Paterrson Thomas, “Comparative study of three types of inverters basedon the output total harmonic distortion”,
2015, http://scholarsmine.mst.edu/masters_theses
7. Jean Noël Fiorina, “inverters and Harmonics”, Cahier Technique Merlin Gerin n° 159 / p.20, E/CT 159 first issued
september 1993
7/9/2016 26

27. Thank you for your attention . . .