buck & boost operation using single phase matrix converter

MALAVIYA NATIONAL INSTITUTE OF TECHNOLOGY, JAIPUR.

A SEMINAR PRESENTATION ON

“ BUCK & BOOST OPERATION USING SINGLE PHASE MATRIX CONVERTER ”

Guided by: Presented by:

CONTENTS1.Introduction to Single Phase Matrix Converter.

2. Controlled Rectifier using SPMC.

3.Boost rectifier using SPMC.

4.Buck operation using SPMC.

5.SPMC incorporating APWM Technique.

6.Buck operation Simulation Results.

7.Boost rectifier simulation Results.

8.Comparision of conventional Boost rectifier and SPMC with

APWM.

9.Conclusion.

10. References.

SINGLE PHASE MATRIX CONVERTER Single Phase Matrix convert(SPMC) consists of Matrix input

and output lines with four bi-directional switches connecting

the single phase input to single phase output.

The main advantage of Matrix converter over conventional

converters is it doesn’t have any reactive elements hence

helps in power factor improvement.

It is inherently bidirectional, so, can regenerate energy back

to supply.

. Injected current Harmonic s are reduced as a result power

quality gets increased.

CONTROLLED RECTIFIER USING SPMC

There will be two states positive state and

negative state.

Although, only positive state is used. Negative

state is redundant.

BOOST RECTIFIER USING SPMC

For Boost rectifier operation a pair of switches

S1a and S4a are turn ON state whilst switch S3a

implements PWM control in positive cycle.

For Negative cycle, S3b and S2b are turn into ON

state, whilst S4b provides control using PWM.

Switching frequency is 5KHz.

The proposed operation can be divided in to four

modes.

When the Inductor current rises from I1 to I2 in time

t1,

And when Inductor current falls linearly from I2 to I1 in time t2,

Where, I = I2- I1 the peak-to-peak is ripple current of inductor L. From equations (1) and (2),

Substituting t1= kT and t2 = (1-k)T yields the average output voltage,

Which gives,

Substituting k=t1/T = t1f into equation (5) yields

Assuming a lossless circuit, VsIs = Vout Iout = Vs Iout/(1-K)

And average Input current is,

The switching period T can be found from

And this gives the peak-to-peak ripple current

BUCK OPERATION USING SPMC

SPMC INCORPORATING APWM

The proposed controlled rectifier with active PWM

using SPMC is as follows,

It is divided into three major components 1) SPMC circuit 2) Boost Inductor 3) Control

function Active power filter is used to force the supply

current to follow the reference signal. Capacitor C is connected to the line circuit in such

a way that its voltage brings a drop in the supply current below reference value.

BUCK OPERATION SIMULATION RESULTS

MATLAB/Simulink is used for simulation of SPMC. RC load of 300Ω and 1000μF is simulated.

BOOST RECTIFIER SIMULATION

The SPMC as Boost rectifier with R load is simulated as shown in figure..

Active power filter function is incorporated to

compensate the distorted supply current to become sinusoidal and in-phase with the supply voltage resulting with low total harmonics distortion(THD) .

SPMC WITH APWM Supply current has been improved from a THD

level of 101% to THD level of below 6.52% when

using SPMC with APWM technique.

COMPARISION OF CONVENTIONAL BOOST RECTIFIER & SPMC WITH APWM

CONCLUSION

The buck operation using SPMC with RC load and boost

rectifier using SPMC topology with R load and RC load has

successfully been implemented. The supply current

waveform for the RC load with APWM function results with

an almost sinusoidal and in-phase with the supply voltage.

This results in improved power factor and reduced THD

level. The simulation results have been presented in the

form of waveforms and tabulated data to verify the

operation of the proposed rectifier. It is shown that the SPMC

topology has inherent versatility extending beyond the

direct AC-AC converter, DC chopper and rectifier operation.

REFERENCES

[1]. Renjini G, “Buck and Boost operation using single phase Matrix Converter”, Power and Energy Conference, April 2009, PECon. Vol 15, Page(s): 587-595.

[2] Sobczyk, T., "Numerical Study of Control Strategies for Converter," Frequency Conversion with a Matrix Converter," Proceedings Of Conference on Power Electronics and Motion Control, Warsaw, Poland, 1994, pp. 497-502.

[3] Aluisio A. Bento, Edison R. da Silva and Euzeli C. dos Santos Jr., "Reducing the Inductor Size and Current Stress by Interleaved Bidirectional Boost Rectifiers Used for Power Factor Correction", Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06. 19-23 March 2006.

[4] P. W. Wheeler, J. Rodriguez, J. C. Clare, L. Empringham, A.Weinstein; “Matrix converters: a technology review”, IEEE Transactions on Industrial Electronics., Vol. 49, April 2002, Issue: 2, Page(s): 276-288.

[5] Huai Wei, Issa Batarseh, Guangyong Zhu & Peter Kornetzky."A Single-Switch AC-DC Converter with Power Factor Correction", IEEE Transaction on Power Electronics, Vol 15, No.3, May 2000.

[6] Baharom R.,A. S.A. Hasim, M.K.Hamzah and A.F Omar; “A New Single-Phase Controlled Rectifier Using Single-Phase Matrix Converter Topology”. Proceeding for IEEE First International Power and Energy Conference, 2006