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.