ZVS invererF-1

8/7/2019 ZVS invererF-1

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INVERTER BASED ON ZERO VOLTAGEINVERTER BASED ON ZERO VOLTAGE

SWITCHINGSWITCHING

WITH AUXILIARY RESONANT CONVERTER WITH AUXILIARY RESONANT CONVERTER

BRAGHADESWARAN T

LINGADURAI G

MANIKANDAN V BRAJESH GNANADURAI A

GUIDED BY: Mrs.V.Ramya

SUBMITTEDBY:



ØA Zero Voltage Switching (ZVS) dc link, single-phase, pulse width-modulated Voltage SourceInverter (VSI) will be proposed.

ØØOperating principle and various operating

intervals of the converter will be presentedand analyzed.

Ø

ØDesign example of experimental results from alaboratory prototype model will be presented.

SCOPE OF THE PROJECT:SCOPE OF THE PROJECT:



STEPDOWN TRANSFORMER

230/15 V

DRIVER CIRCUIT –AUXILIARY CONVERTER

RECTIFIER

INVERTER

AUXILIARY

CONVERTER

DRIVER CIRCUIT-

INVERTER

RESISTIVE LOAD LC FILTERBLOCK

DIAGRAM:

AC MAINS230 V



ØWide applications - Circuit simplicity andrugged control scheme.

Ø

ØHigh-frequency (HF) operation increases its

switching stress.Ø

ØLimitation to increase the switching frequency -Switching losses.

Ø

ØSignificant turn-on losses in the activeswitches.Ø

ØInput DC source : PWM inverter is fixed DC butnot a controlled one.

Ø

Conventional PWM InverterConventional PWM Inverter



ØReduce the voltage stress to the dc link voltage.

ØØ Soft switching is implemented even with higher

frequency .

Ø

Ø The soft switching for all power factor conditions is

achieved by modifying the carrier for reactivepower-flow conditions.

Ø

ØAll the switches turn-on with zero voltage and theturn-off losses are reduced by lossless capacitive

snubber.

Ø

ØDuring reverse recovery, the di/dt is controlled by theresonant inductor.

Feature of proposed InverterFeature of p

roposed Inverter



ØThe switch voltage is clamped to the dc linkvoltage.

Ø

ØPWM schemes can be used to control the

inverter output voltage.

ØThe PWM modulation scheme is used to obtainoptimum system performance and to

achieve ZVS at different power factorloads.

Ø

ØIt is widely used in variable dc link inverter forimprovement of total harmonic distortionto a minimum level.

Features of Proposed converterFeatures of Prop

osed converter



RESONANT SWITCH IMPLEMENTATIONRESONANT SWITCH IMPLEMENTATION



ØConventional square wave power conversion

during the switch's on-time with "resonant"switching transitions.

Ø

ØFor a given unit of ton, this method is similar

to fixed frequency conversion which uses anadjustable duty cycle.

Ø

ØRegulation of the output voltage isaccomplished by adjusting the effectiveduty cycle.

Ø

ØThe foundation of this conversion is simplythe volt-second product equating of the

input and output.

Zero Voltage Switching Overview Zero Voltage Switching Overview



CIRCUIT COMPONENTSCIRCUIT COMPONENTS



HARDWARE SPECIFICATIONHARDWARE SPECIFICATION

AUXILIARY CONVERTER:

Input : 12 volt to 230 volt Maximum of 8 Amps Rating Gate to Source voltage(VGS ) : 10 volt

Carrier frequency (Switching frequency) for

Auxiliary converter : 25KHZ Resonant frequency f r : 12.5 KHz Resonant inductor Lr= 32uH Resonant Capacitor Cr = 4.7uF

DC link Capacitor = 0.22uF MOSFET used is IRFP460



PWM INVERTER:PWM INVERTER:

Input : 12 volt to 230 volt Maximum of 15 Amps Rating

Gate to Source voltage VGS : 10 volt

Carrier frequency (Switching frequency) : 25KHZ MOSFET used is IRFP460



GENERATION OF CARRIER WAVEGENERATION OF CARRIER WAVE

Frequency of Output is given byF o = R2/4Rt .C .R1 = 12.4 KHz



Generation of PWM:Generation of PWM:



PWM Generator :PWM Generator :



MOSFET – IRPFMOSFET – IRPF450 :450 :



FeaturesFeatures

20A, 500V Drain-source resistance ON = 0.270

Ω

SOA is Power Dissipation Limited Nanosecond Switching Speeds Linear Transfer Characteristics High Input Impedance



IR IR 21102110-Driver IC-Driver IC



ØIndependent high and low side referenced

output channels.

Ø

ØPropagation delays are matched to simplify usein high frequency applications.

Ø

ØThe floating channel can be used to drive an N-

channel power MOSFET which operates up to500 or 600 volts.

MOSFET Driver Circuit (IR MOSFET Driver Circuit (IR 21102110))



WIDE BANDWIDTHWIDE BANDWIDTHQUAD J-FET OPERATIONAL AMPLIFIERSQUAD J-FET OPERATIONAL AMPLIFIERS



Features:Features:

ØLOW POWER CONSUMPTION

ØLOW INPUT BIAS AND OFFSET CURRENTØØOUTPUTSHORT-CIRCUIT PROTECTION

ØØHIGH INPUT IMPEDANCE JFET INPUT STAGE.

Ø



Power supply unitPower supply unit



Dual regulated power supply circuitDual regulated power supply circuit



MATLAB SIMULATIONMATLAB SIMULATION



MATLAB SimulationMATLAB Simulation

powergui

Discrete,

s= 5e-005 s.

Voltage Measurement1

v+-

Voltage Measurement

v+-

Term inat or3

Term inat or2

Terminat or1

Terminator

Series RLC Branch2

Series RLC Branch1

Series RLC Branch

Sc ope1

Scope

Pulse

Gen erat or2

Mosfet4

g

m

D

S

Mo sfet3

g

m

D

S

Mo sfet2

g

m

D

S

Mo sfe t1

g

m

D

S

Mosfet

g m

D S

[G4_2]

[G3_2]

[G2_2]

[G1_2]

[G4_2]

[G3_2]

[G2_2]

[G1_2]

Dis play1

10

Display

2.26e-011

Discrete

PW M Generator

4 pu ls es1

Pulses

DC Voltage Source



PWM Pulse:PWM Pulse:For Auxiliary CircuitFor Auxiliary Circuit

Time (us)

Voltage



INVERTER : I/O WaveformINVERTER : I/O Waveform

Y1

Y2

Vol t a ge

Time(us)

Vo

l t a ge



Input And Output Of The Converter:Input And Output Of The Converter:

Time(us)

vol t a ge



Used in Un-Interrupted Power Supply.

Used in High Frequency SwitchingConverter.

Used in Industrial Drives.

Solar inverter.

ApplicationsApplications



Only one extra switch is required in the dc link toobtain ZVS.

Experimental results confirm the soft switching

characteristics of the proposed VSI.

An experimental prototype laboratory model of 300 VA, 120 V, 60 Hz, VSI operating at 50 kHz

is implemented using MOSFETs.

CONCLUSIONCONCLUSION



Limitations - trade-offs betweenfrequency and output power.

Output of inverter can be remotelycontrolled.

Higher switching frequency requires correctuse of the resonant network circuitimplementation.

Packaging of converters with reducedstray inductance and size - Greatercommercialization of these converters.

Future Scope:Future Scope:



Ø Agelidis V.G., P. D. Ziogas, and G. Joos, “An optimummodulation strategy for a novel notch commutated 3-phase PWM inverter,”.

Ø

Ø Bellar M. D., T. S.Wu, A. Tchamdjou, J. Mahdavi, and M.

Ehsani, “A review of soft switched DC-AC converters,”.

Ø Divan D. M., “The resonant dc link converterA newconcept in static power conversion,”.

Ø Oh. I. and M. J. Youn, “A simple soft switched PWMinverter using

source voltage clamped resonant circuit,”.

Ø Wang K., Y. Jiang, S. Dubovsky, G. Hua, D. Boroyevich,and F. C. Lee, “Novel Dc-Rail soft switched three phase

voltage source inverters,”.Ø

ReferencesReferences



Thank you.

ZVS invererF-1

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