A TWO OUTPUT SERIES

RESONANT INVERTER FOR

“INDUCTION HEATING-

COOKING” APPLIANCES

PRESENTED BY:

UDAY KUMAR.A

VAMSHI KRISHNA.N

ADITHYA.B

OBJECTIVES:

TO DESIGN A TWO OUTPUT SERIES

INVERTER FOR MULTIPLE BURNER

INDUCTION HEATING-COOKING

APPLIANCES

TO CONTROL TWO OUTPUTS(LOADS)

SIMULTANEOUSLY AND INDEPENDENTLY

UP TO THEIR RATED POWERS

TO MAKE USE OF AVC AND ZVS

TECHNOLOGIES EFFECTIVELY

INVERTER TOPOLOGIES:

USING SINGLE O/P INVERTER FOR TWO

OR MORE BURNERS

USING SEVERAL RESONANT CAPACITORS

CONNECTED TO LOADS BY MEANS OF

ELECTRO-MECHANICAL SWITCHES

USING MULTIPLE O/P INVERTERS

REQUIREMENTS:

TWO O/P SERIES RESONANT INVERTER

VARIABLE O/P POWER

FIXED FREQUENCY CONTROL

INDUCTION HEATING-COOKING

APPLIANCE SCHEMATIC

DIAGRAM:

BASIC STRUCTURE OF TW0 O/P

SERIES RESONANT INVERTER

DOUBLE FULL BRIDGE

STRUCTURE FOR SELECTED

AVC CONTROL

ASYMMETRICAL VOLTAGE

CANCELLATION (AVC):

Asymmetrical Voltage Cancellation is a

generalized control technique for resonant

inverters

This technique is mostly applied to series

resonant inverters

This technique improves performance and

achieves better efficiency than conventional

fixed frequency control strategies

It considers ZERO VOLTAGE SWITCHING

operation , output power and load variations

ZERO VOLTAGE

SWITCHING(ZVS):

Zero voltage switching can be defined

as conventional square wave power

conversion

during the switch’s on-time with “resonant”

switching transitions.

ALGORITHM AND

MATHEMATICAL PROCEDURE

INVOLVED:

SYNTHESIS OF CONTROL

CIRCUIT:

SYNTHESIZED TWO O/P

SERIES RESONANT INVERTER

DERIVATION OF DIFFERENT

CONFIGURATIONS

PERIODIC SEQUENCE OF

CONFIGURATIONS:

TABULAR COLUMN SHOWING

THE ORDER OF TRIGERRING

OF VARIOUS IGBT’S

IMPLEMENTED TWO O/P

SERIES RESONANT INVERTER

SPECIFICATIONS & HARDWARE

USED:

IGBT TRANSISTORS WITH ANTI-PARALLEL

DOIDES(intersil HGTG20N60B3D)- 6 nos

Loads: R1,R2=9.5 OHMS

L1,L2=60 u H

C1,C2=450nF

Peak Input Voltage=325V

Switching Frequency=48KHz

Maximum O/P Power=3.2kW

PRACTICAL ADVANTAGES:

Higher Utilization Ratio of Electronics

Higher maximum power

It is possible to share some components of the

power converters

Electromagnetic Noise spectrum is reduced

Acoustics noises and interference are

eliminated

High frequency switching is possible

SCOPE & CONCLUSION:

o Use of Asymmetrical Voltage Cancellation(AVC) and Zero Voltage Switching(ZVS) enables the user to obtain a quick HEATING FUNCTION

o Optimum Utilization of rated power

o Different from traditional approaches which makes use of resonant capacitors , large number of bidirectional switches etc.,

o Guarantees greater efficiency and durability in all industrial and domestic induction cooking appliances.

REFERENCES:

[1] M. K. Kazimierczuk and D. Czarkowski, Resonant Power Converters. New York: Wiley, 1995.

[2] L. Hobson and D. W. Tebb, “Transistorized power supply for induction heating,” Int. J. Electron., vol. 59, pp. 533–542, May 1985.

[3] F. P. Dawson and P. Jain, “A comparison of load commutated inverter system for induction heating and melting applications,” IEEE Trans.Power Electron., vol. 6, no. 4, pp. 430–441, Jul. 1991.

[4] L. Hobson, D. W. Tebb, and D. Turnbull, “Dual element induction cooking unit using power MOSFETs,” Int. J. Electron., vol. 59, pp. 747–757, Jun. 1985.

[5] H. W. Koertzen, J. D. van Wyk, and J. A. Ferreira, “Design of the halfbridge series resonant converter for induction cooking,” in Proc. IEEEPower Electronics Specialists Conf. (PESC), 1995, pp. 729–735.