Resonant converts

1. M-TECH
FINAL TECHNICAL SEMINAR
ON
VERY HIGH FREQUENCY SWITCH
MODE POWER SUPPLY WITH 50V
INPUT AND 5V OUTPUT
In
Power Electronics
Electrical & Electronics Engineering Dept.
REVA ITM,Banglore-64
PRESENTED BY
RAKESH B HALLIGUDI
I SEMISTER

2. ACKNOWLEDGEMENT
 I express my sincere thanks to Mickey Madsen, Arnold
knott and Michel A.E Andersen for their valuable
contribution.
 I extend my sincere gratitude to Mrs. Monika Sharma
Assistant processor ,EE department who supported me
in doing this seminar.
 I extend my sincere gratitude to the seminar coordinate
Mrs. Divya k.s .for her cooperation for presenting
seminar.
 I also extend my sincere thanks to all other faculty
members of electrical and electronics department and
my friends for their support and encouragement .

3. TABLE OF CONTENTS
 Abstract
 Introduction
 Resonant rectifier
 Resonant inverter
 Work done by me
 Conclusion
 References

4. ABSTRACT
Design of SMPS with switching
frequency in the VHF range ,with large
step down ratio and low output power.
Resonant converters are used.
 Efficiency from 82.9% is obtained

5. INTRODUCTION
Power density of the power supply should be
high.
SMPS made it possible.
Previous topologies are Hard switching.
Switching losses are high at VHF.
Lead to the development of Resonant
converter.

6. ADVANTAGES OF RESONANT
CONVERTER
Low switching losses.
High power density is obtained.
Very Fast transient response.
 Increase the dv/dt and di/dt limit
and EMI is reduced.
Output power and voltage control.

7. RESONANT RECTIFIER
CLASS E

8. CLASS DE RECTIFIER

9. SELECTION OF RECTIFIERS
 Class E for low
voltage
 Class DE for high
voltage
 Cost is same for
both rectifiers

10. RESONANT INVERTER
CLASS E RESONANT CONVERTER

11. CLASS 2

12. SELECTION OF INVERTERS
 Class E has less
components
 Voltage a/c MOSFETS is
more and has high
inductor value.
 for 2 the voltage a/c
MOSFET is less but has
more losses compared
to e
 E is best suited for this
application.

13. WORK DONE BY ME
SIMULATED WAVEFORM FOR CLASS E RECTIFIER

14. 0 2e-005 4e-005 6e-005 8e-005 0.0001 0.00012 0.00014 0.00016 0.00018 0.0002
Time (ms)
0
-0.2
-0.4
0.2
0.4
0.6
Id Il Iin1
0 2e-005 4e-005 6e-005 8e-005 0.0001 0.00012 0.00014 0.00016 0.00018 0.0002
Time (ms)
0
-5
5
10
15
20
25
Vd Vl

15. CLASS E INVERTER

16. 0
-5
5
10
15
20
25
30
35
Ifet Iin Il
0
-20
20
40
60
80
100
120
vl Vfet

17. CONCLUSION
 Class E rectifier is chosen as it ha s lower voltage drop.
 Class e inverter is best suited .
 Efficiency of 83% are obtained.

18. REFERENCES
 (1) Mickey Madsen, Arnold Knott, Michel A.E.Andersen,
“Low power very high frequency switch mode power
supply with 50V input and 5V output”, IEEE Transactions
of Power Electronics.Vol.29, No.12 December 2014.
 (2) W. C. Bowman, J. F. Balicki, F. T. Dickens, R. M.
Honeycutt, W. A.Nitz, W. Strauss, W. B. Suiter, and N. G.
Ziesse, “A resonant DC-to-DC converter operating at 22
megahertz,” in Proc. IEEE Third Annu. Appl. Power
Electron. Conf. Expo., Feb. 1–5, 1988, pp. 3–11.
 (3)M. K. Kazimierczuk, RF Power Amplifiers, 1st ed.
NewYork, NY, USA Wiley, 2008.

19. THANK YOU