Leakage Compensation of trascutaneous transformer

GOVERNMENT COLLEGE OF ENGINEERING

CHANDRAPUR

Presentation by

Mr . Mohan Mehar

Guided By

Prof. D.V. Rojatkar Sir

Leakage Compensation Of

TRANSCUTANEOUS TRANSFORMER

CONTENT

Introduction

Proposed transcuteneous energy transfer scheme

Analysis of the Proposed Scheme

Determination of the Control Region

Design of the system

Control of the System

Advantages

Challanges

Conclusion

Referances.

INTRODUCTION

Transcutaneous transformer

Proposed Scheme for high Gv at variable load and K

Turns Ratio should be uniy

Analysis of the Proposed Scheme

• Gv and compensated frequency (w0)

• Gv and coupling coefficient (k)

• Determination of Control Region

For k=0.1

For k=0.4

For convertor Wr=1

For V0 Gain is function of Wr

Design of the SystemV0=24V I0min=0.5A Iomax=2.0A

Parameter Magnitude Specify

Size, Geometry, Core

Ferroxcube Pot Core 6656

3C8 Ferrite

OD 2.6 in, thickness 1.1 in

Air gap: 10–20 mm

Misalignment: 0–10 mm.

Quality Factor Q 2 to 8 Should be low to be least sensitive to GV

Comp.R.W0 120KHz for small size and high efficiency

Ll1 and Ll263.5µH each for T.R.=1 and

k=0.265

C1 and C2 27 nF each for T.R.=1 and k=0.265

Advantages

Increased Gv for variable load and K

Reduced Ll and Im.

High efficiency (90-98%) high power transmission (12-48W)

No Biological effect and infection

Minimum Configuration in thorax

Reliable

ZVSand ZCS

Applicable for wireless transmission

Challanges

High Cost

Thermal imapct limits usable coil

geometry

No. of Heartbeat

Conclusion

According to NCHS, 7,00,000 cardiovascular victims peryr.

33,600 TAH implant/yr

900 LVAS/yr

270/1000 lives can be saved.

Control Region for operating frequency determined.

Design procedure for reduced Ll and Im established.

No Biological effect and infection

Applicable for wireless transmission

[1] A. Ghahary and B. H. Cho, “Design of a transcutaneous energy

transmission system using a series resonant converter,” in IEEE Power

Electronics Specialists Conf. Rec., 1990, pp. 1–8.

[2] J. C. Schuder and H. E. Stephenson, “Energy transport to a coil

which

circumscribes a ferrite core and is implanted within the body,” IEEE

Trans. Bio-Med. Eng., vol. BME-12, nos. 3 and 4, pp. 154–163, 1965.

[3] J. C. Schuder, J. H. Gold, and H. E. Stephenson, “Ultra high power

electromagnetic energy transport into the body,” IEEE Amer. Soc. Artif.

Int. Organs, vol. 17, pp. 406–410, 1971

Referances