1. Transformer-less Voltage
Quadrupler DC Converter With
PV input
JOSE J ABRAHAM (312311105053)
JOHN PETER RAJA D(312311105052)
GUIDED BY– DR ARUNACHALAM
ASSOCIATE PROFESSOR
St. Joseph’s College of Engineering
D EDEPARTMENT OF EEE

2. OBJECTIVE
• To implement voltage quadrupler DC to DC
converter
• 1)To achieve High voltage gain by interleaving technique
• 2)Without transformer
• 3)To Reduce number of switches
• 4)To Reduce the voltage stress of both active switches and diodes

3. DRAWBACKS
• snubber needed
• leakage inductance is more
• filter value is high
• more number of switches
• Losses due to transformer
FULL BRIDGECONVERTER
CONVENTIONAL METHOD 1
The DC-DC converter to set up the voltage level using transformer. The
transformer is used to increase or decrease the output voltage (depending on
the transformer ratio).

4. Conventional Simulation Circuit Diagram :
The above fig shows conventional simulation circuit diagram.

5. Input Voltage Waveform :
The fig shows the simulated input voltage for the Conventional circuit in MATLAB.

6. Output Voltage and Current Waveforms :
The fig shows the simulated output Voltage and current for conventional circuit in MATLAB.

7. Conventional isolated converters, such as flyback converters, can achieve high voltage
gain by adjusting the turn ratio of the transformer.
Conventional method 2 –flyback converter
Drawbacks
•High voltage spikes
•Transformer ratio high
•Low efficiency
Advantages
Single switch

8. SIMULATIONCIRCUITDIAGRAM:

9. INPUTVOLTAGE:

10. OUTPUTVOLTAGE ANDCURRENT:

11. The proposed topology utilizes input-parallel output-series configuration and is
derived from a two-phase interleaved boost converter for providing a much
higher voltage gain without adopting an extreme large duty cycle and reduces
the voltage stress of both active switches and diodes.
QUADRUPLER CIRCUIT

12. MODE 1 – MODE 3:
During Mode 1, switches S1 and S2 are turned
ON,D1a,D1b,D2a,D2b are all OFF.

13. MODE 2:
During Mode 2: For this operation mode, switch S1
remains conducting and S2 is turned OFF . Diodes D2a
and D2b become conducting.

14. MODE 4:
During Mode 4,For this operation mode, switch S2
remains conducting and S1 is turned OFF. Diodes D1a and
D1b become conducting.

15. BLOCK DIAGRAM

16. SIMULATION CIRCUIT DIAGRAM:
Simulation Circuit Diagram - Transformer-less Voltage Quadrupler DC Converter
is shown in Fig:

17. INPUT VOLTAGE
Simulated input voltage - Transformer-less Voltage Quadrupler DC Converter is
shown in Fig:

18. OUTPUT VOLTAGE:
Simulated Output voltage - Transformer-less Voltage Quadrupler DC Converter with is
shown in Fig:

19. OUTPUT CURRENT:
Simulated Output current -Transformer-less Adaptable Voltage Quadrupler DC Converter
with Low Switch Voltage Stress is shown in Fig:

20. VOLTAGE STRESS ACROSS - SWITCHES S1 AND S2 and DIODES D1A,D2B,D2A,D1B :
Simulated Voltage stress across switches S1 and S2 and diodes D1A,D2B,D2A,D1B of the
Transformer-less Voltage Quadrupler DC Converter is shown in Fig:

21. Mathematical analysis

22. PV MODULE DESIGN

23. MODIFIED CIRCUIT SIMULATION WITH PV INPUT

24. SIMULATED – INPUT VOLTAGE

25. SIMULATED – OUTPUT VOLTAGE

26. •High step up voltage gain.
•Voltage stress is reduced.
•Efficiency is high.
•Automatic uniform current sharing characteristic of the
two interleaved phases for voltage boosting mode.
•Battery backup systems for uninterrupted power
supplies.
•Stand alone power supply
•DC drives
ADVANTAGES:
APPLICATIONS:

27. [1] R. W. Erickson and D. Maksimovic, Fundamentals of Power Electronics,
2nd ed. Norwell, MA, USA: Kluwer, 2001.
[2] Q. Zhao, F. Tao, F. C. Lee, P. Xu, and J.Wei, “A simple and effective to alleviate
the rectifier reverse-recovery problem in continuous-current-mode boost converter,”
IEEE Trans. Power Electron., vol. 16, no. 5, pp. 649–658, Sep. 2001.
[3] Q. Zhao and F. C. Lee, “High-efficiency, high step-upDC–DCconverters,” IEEE
Tran s. Power Electron., vol. 18, no. 1, pp. 65–73, Jan. 2003.
[4] W. Li and X. He, “Review of non-isolated high step-up DC/DC converters in
photovoltaic grid-connected applications,” IEEE Trans. Ind. Electron., vol. 58, no. 4,
pp. 1239–1250, Apr. 2011.
[5] N. P. Papanikolaou and E. C. Tatakis, “Active voltage clamp in flyback converters
operating in CCM mode under wide load variation,” IEEE Trans. Ind. Electron., vol.
51, no. 3, pp. 632–640, Jun. 2004.
REFERENCES