Simulation of 3 Phase to 3 Phase Power Conversion Using Matrix Converter with Maximum and Minimum Voltage Transfer Ratio

B.Muthuvel Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 2) November 2015, pp.96-103
www.ijera.com 96 | P a g e
Simulation of 3 Phase to 3 Phase Power Conversion Using Matrix
Converter with Maximum and Minimum Voltage Transfer Ratio
B. Muthuvel*, T. S. Anandhi**, P.Sivagnanam***, K.Ramash kumar
*(Department of EEE, AKT Memorial College of Engineering and Technology, Kallakurichi)
**(Department of Electronics and Instrumentation Engineering, Annamalai University, Chidambaram.)
***(Principal, Krishnasamy College of Engineering and Technology, Kumarapuram, Cuddalore)
****(Department of EEE, Dr.S.J.S.Paul Memorial College of Engineering and Technology, Puducherry)
ABSTRACT
This paper proposes a new approach of design and implementation of 3 phase to 3 phase conversion using
matrix converter. It includes the design, modeling and implementation. The entire matrix converter circuits are
developed by mathematical model so as to reduce computational time and performances of the converter are
evaluated using MATLAB/SIMULINK for RL Load. The mathematical expressions relating the input and
output of the three phase matrix converter are implemented by using simulink block set. The duty cycles of the
matrix converter bidirectional switches are calculated using modified venturini algorithm for maximum (0.866)
and minimum (0.5) voltage transfer ratio.
Keywords - 3 phase to 3 phase converter, AC to AC converter, Matrix converter, Multi-phase converter, Power
converter.
I. INTRODUCTION
A matrix converter is an ac/ac converter that can
directly convert an ac power supply voltage into an
ac voltage of variable amplitude and frequency. It
has high power quality and it is fully regenerative.
Due to the increasing importance of power quality
and energy efficiency issues, the Matrix converter
technology has recently attracted the power
electronics industry. Direct ac/ac converters have
been studied in an attempt to realize high efficiencies,
long lifetime, size reduction, and unity power factors.
The benefits of using direct ac/ac converters are even
greater for medium voltage converters as direct ac/ac
converters do not require electrolytic capacitors,
which account for most of the volume and cost of
medium-voltage converters.
Due to the absence of energy storage elements,
Matrix converter has higher power density than
PWM inverter drives. However, for the same reason,
the ac line side disturbances can degrade its
performance and reliability. Therefore the matrix
converter drive performance under abnormal input
voltage conditions were introduced [1].Timing errors
in the switching between the series-connected
switches cause a voltage imbalance in the snubber
circuit and increase voltage stress. A new
bidirectional switch with regenerative snubber to
realize simple series connection for matrix converters
was proposed [2]. Forced commutations of the high
number of semiconductors cause switching losses
that reduce the efficiency of the system and imply the
use of large heat sinks. Hence a predictive approach
to increase efficiency and reduce switching losses on
matrix converter was presented [3].Classical
modulation techniques are not applicable because of
the needed high output frequencies. Hence
Bidirectional switch commutation for a Matrix
converter supplying a series resonant load was
developed [4]. New investigations to develop
appropriate digital carrier modulation schemes for
controlling conventional and indirect matrix
converter with minimized semiconductor
commutation count [5].
A single-phase Z-source Buck-Boost matrix
converter which can buck and boost with step-
changed frequency, and both the frequency and
voltage can be stepped up or stepped down was
developed [6]. A matrix converter has the potential to
offer improved operational performance by
evaluating its design and potential operating
performance in a marine electric propulsion system
[7]. A fault-tolerant matrix converter with
reconfigurable and modified switch control schemes,
along with a fault diagnosis technique for open-
circuited switch failure were proposed [8]. A new
control method for a matrix converter based
induction machine drive ware introduced. A discrete
model of the converter, Motor, and input filter is to
predictive the behavior of torque, flux, and input
power to the drive [9].
For various industrial adjustable speed ac drives
and applications, various analysis and mathematical
model is introduced in matrix converter. By varying
the Modulation Index (MI), the outputs of the matrix
converter are controlled and in ac drives, speeds of
the drive were controlled. To reduce the
RESEARCH ARTICLE OPEN ACCESS

computational time and low memory requirement, a
mathematical model has been developed [10]-[16].
In this paper, the converter are designed and
implemented for the 3 phase to 3 phase matrix
converter in open loop configuration and the power
circuit in open loop are implemented by the
mathematical modeling. The duty cycle calculation is
taken into account for Maximum (0.866) and
minimum (0.5) voltage transfer ratios and the
mathematical model is realized with the RL load. The
entire power circuit is modeled with
MATLAB/SIMULINK. Implementation of converter
in mathematical modeling includes the modeling of
power circuit, Control algorithm, and load. Merits of
Mathematical model over conventional power circuit
are less computation time and low memory
requirement. The proposed model is very simple,
flexible and can be accommodated with any type of
load. Fig. 1 refers the Basic block diagram of the
proposed 3pase to 3 phase Matrix converter.
Fig.1. Basic block diagram of 3pase to 3 phase
Matrix converter.
II. MATRIX CONVERTER
The Matrix converter (MC) is a single stage
direct ac to ac converter, which has an array of m x n
bi-directional switches that can directly connect m
phase voltage source into n phase load. A 3 phase
matrix converter consists of 3x3 switches arranged in
matrix form. The arrangement of bi-directional
switches is such that any of the input phases R,Y,B is
connected to any of the output phases r,y,b at any
instant. The average output voltage with desired
frequency and amplitude can be controlled by the bi-
directional switches. The bi-directional 3x3 switches
(29
) gives 512 combinations of the switching states.
But only 27 switching combinations are allowed to
produce the output line voltages and input phase
currents. The desirable characteristics of a Matrix
converter are as follows:
 Sinusoidal input and output waveforms with
minimal higher order harmonics and no
subharmonics;
 Minimal energy storage requirements
 Controllable input power factor
 Bidirectional energy flow capability
 Compact design
 Long life due to absence of a bulky electrolytic
capacitor
 Unity input power factor at the power supply
side
Fig.2. circuit scheme of 3 phase to 3 phase matrix
converter
Limitations of Matrix converter are
 The voltage transfer ratio limitation has a
maximum value of 0.866
 Sensitive to the power source distortion due to
the direct connection between input and output
sides.
Input filter is needed in order to eliminate the
harmonic components of the input current and reduce
the input voltage distortion supplied to the Matrix
Converter as shown in fig.2.
III. CONTROL ALGORITHM
When 3 phase to 3 phase converter operated
with9 bi-directional switches, the following two basic
rules have to be satisfied [10].
 Two or three input lines should not be
connected to the same output line – to avoid
short circuit
 At least one of the switches in each phase
should be connected to the output – to avoid
open circuit.
The switching function of single switch as
SKj = {
1, switch SKj closed
0, switch SKj opened
(1)
Where, K = {r, y, b), j = {R, Y, B}
The above constraints can be expressed by
Srj + Syj + Sbj = 1, j = {R, Y, B} (2)
With these restrictions, the 3 x 3 matrix converter has
27 possible switching states.
The input or source voltage vector of the 3 phase to 3
phase Matrix converter is
Vi =
𝑉𝑅
𝑉𝑌
𝑉𝐵
=
𝑉𝑖𝑚 cos(𝜔𝑖 𝑡)
𝑉𝑖𝑚 cos⁡(𝜔𝑖 𝑡 +
2𝜋
3
)
𝑉𝑖𝑚 cos⁡(𝜔𝑖 𝑡 +
4𝜋
3
)
(3)
3 Phase
Input
Power
Circuit of
Matrix
ConverterSwitching or
control
Algorithm
Load

The output voltage vector of the 3 phase to 3 phase
Matrix converter is
Vo =
𝑉𝑟
𝑉𝑦
𝑉𝑏
=
𝑉𝑜𝑚 cos(𝜔𝑜 𝑡)
𝑉𝑜𝑚 cos⁡(𝜔𝑜 𝑡 +
2𝜋
3
)
𝑉𝑜𝑚 cos⁡(𝜔𝑜 𝑡 +
4𝜋
3
)
(4)
The input or source current vector of the 3 phase to 3
phase Matrix converter is
Ii =
𝐼 𝑅
𝐼𝑌
𝐼 𝐵
=
𝐼𝑖𝑚 cos(𝜔𝑖 𝑡)
𝐼𝑖𝑚 cos⁡(𝜔𝑖 𝑡 +
2𝜋
3
)
𝐼𝑖𝑚 cos⁡(𝜔𝑖 𝑡 +
4𝜋
3
)
(5)
The output current vector of the 3 phase to 3 phase
Matrix converter is
Io =
𝐼𝑟
𝐼𝑦
𝐼𝑏
=
𝐼𝑜𝑚 cos(𝜔𝑜 𝑡)
𝐼𝑜𝑚 cos⁡(𝜔𝑜 𝑡 +
2𝜋
3
)
𝐼𝑜𝑚 cos⁡(𝜔𝑜 𝑡 +
4𝜋
3
)
(6)
Where, 𝜔𝑖 - frequency of input voltage and
𝜔𝑜 - frequency of output voltage
The relationship between output and input voltage is
given as
𝑉𝑜 (t) = M (t). 𝑉𝑖(t) (7)
Where 𝑀𝑡 is the transfer Matrix and is given by
M (t) =
𝑀 𝑅𝑟 𝑀 𝑌𝑟 𝑀 𝐵𝑟
𝑀 𝑅𝑦 𝑀 𝑌𝑦 𝑀 𝐵𝑦
𝑀 𝑅𝑏 𝑀 𝑌𝑏 𝑀 𝐵𝑏
(8)
where, MRr = tRr / Ts, duty cycle switch SRr, Ts is the
sampling period. The input current is given by
I in = MT
Io (9)
Duty cycle must satisfy the following condition in
order to avoid short circuit on the input side.
𝑀 𝑅𝑟 + 𝑀 𝑌𝑟 + 𝑀 𝐵𝑟 = 1 (10)
𝑀 𝑅𝑦 + 𝑀 𝑌𝑦 + 𝑀 𝐵𝑦 = 1 (11)
𝑀 𝑅𝑏 + 𝑀 𝑌𝑏 + 𝑀 𝐵𝑏 = 1 (12)
The above condition is fulfilled by calculation of
duty cycle using modified venturini algorithm.
In venturini switching algorithm, the maximum
voltage transfer ratio is restricted to 0.5.This limit can
be overcome by using modified venturini algorithm
[16]. The maximum possible output voltage can be
achieved by injecting third harmonics of the input
and output frequencies into the output waveform
[11]. This will increase the available output voltage
range to 0.75 of the input when third harmonics has a
peak value of Vi/4. Further increasing of the transfer
ratio can be achieved by subtracting a third harmonic
at the output frequency from all target output
voltages. Hence the maximum transfer ratio of
0.75/0.866 = 0.866 of Vi when this third harmonic
has a peak value of Vo/6.Therefore the output voltage
becomes
𝑉𝑜𝛾 =𝑞𝑉𝑖𝑚 𝑐𝑜𝑠(𝜔𝑜 𝑡 + 𝜓𝛾 )–
𝑞
6
𝑉𝑖𝑚 𝑐𝑜𝑠(3𝜔𝑜 𝑡)+
1
4𝑞 𝑚
𝑉𝑖𝑚 (3𝜔𝑖 𝑡) (13)
Where, 𝜓𝛾 = 0, 2π/3, 4π/3 corresponding to the output
phase r, y, b [11], [15], [16].
IV. DESIGNING OF MATRIX
CONVERTER
The actual MATLAB/SIMULINK model of 3
phase to 3 phase Matrix converter is shown in fig.3. it
comprises normally 3 sections.
4.1 Designing of Control Algorithm
Fig.3. Mathematical Designing of 3 phase to 3 phase
Matrix converter.
The required voltage transfer ratio (q), output
frequency (fo) and switching frequency (fs) are the
inputs required for calculation of duty cycle matrix
M. the duty cycle calculations for voltage transfer
ratio of 0.5 and 0.866 are realized in the form of m-
file in Matlab.
Duty cycles for 0.5 & 0.866 voltage transfer ratio are;
𝑀 𝑅𝑟 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃)) (14)
𝑀 𝑌𝑟 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃 −
2𝜋
3
)) (15)
𝑀 𝐵𝑟 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃 −
4𝜋
3
)) (16)
𝑀 𝑅𝑦 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃 −
4𝜋
3
)) (17)
𝑀 𝑌𝑦 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃)) (18)
𝑀 𝐵𝑦 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃 −
2𝜋
3
)) (19)
𝑀 𝑅𝑏 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃 −
2𝜋
3
)) (20)
𝑀 𝑌𝑏 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃 −
4𝜋
3
)) (21)
𝑀 𝐵𝑏 =
1
3
(1 + 2𝑞 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜃)) (22)
Where, 𝜔 𝑚 = 𝜔𝑜 − 𝜔𝑖 = modulation frequency
θ = relative phase of output, q =voltage transfer ratio
Switching time for voltage transfer ratio of 0.866 are;

𝑇𝛽𝛾 =
𝑇𝑠
3
1 +
2𝑉𝑜 𝛾 𝑉 𝑖𝛽
𝑉𝑖𝑚
2 +
2 𝑞
3𝑞 𝑚
sin 𝜔𝑖 𝑡 + 𝜓 𝛽 sin(3𝜔𝑖 𝑡)
(23)
where, 𝜓 𝛽 = 0, 2π/3, 4π/3 corresponding to the input
phases R,Y,B, 𝑞 𝑚 = maximum voltage transfer ratio,
q = required voltage ratio, 𝑉𝑖𝑚 =input voltage vector
magnitude, 𝑇𝑠 = sampling period.
4.2 Designing of power circuit
The modeling of power circuit is derived from
basic output voltage equations [17], [18].
𝑉𝑟 (t) = 𝑀 𝑅𝑟 𝑉𝑅(t) + 𝑀 𝑌𝑟 𝑉𝑌(t) + 𝑀 𝐵𝑟 𝑉𝐵(t) (24)
𝑉𝑦 (t) = 𝑀 𝑅𝑦 𝑉𝑅(t) + 𝑀 𝑌𝑦 𝑉𝑌(t) + 𝑀 𝐵𝑦 𝑉𝐵(t) (25)
𝑉𝑏 (t) = 𝑀 𝑅𝑏 𝑉𝑅(t) + 𝑀 𝑌𝑏 𝑉𝑌(t) + 𝑀 𝐵𝑏 𝑉𝐵(t) (26)
Fig.4 shows the realization of modeling block of
power circuit of „r‟ phase in 3 phase to 3 phase
Matrix converter. The switching pulses for the bi-
directional switches are realized by comparing the
duty cycles with a saw tooth waveform having very
high switching frequency
Fig.4. Designing block of power circuit of „r‟ phase
in 3 phase to 3 phase Matrix converter.
4.3 Designing of Load
The transfer function of mathematical modeling
of RL load is
𝐼(𝑆)
𝑉(𝑆)
=
1
𝐿𝑠+𝑅
(27)
V. SIMULATION RESULTS AND
DISCUSSION
The simulation of 3 phase to 3 phase Matrix
converter for open loop are carried out using
simulink blockset.
5.1. Simulation output of 3 phase to 3 phase
Matrix converter for Maximum Modulation Index
(0.866)
Simulations are performed for maximum voltage
transfer ratio „q‟ = 0.0.866 (Duty cycle), Amplitude
=325.26V and time limit is 0.1 m.Sec. The output is
realized with 3 phase passive RL load for R= 10 Ω
and L= 20 mH. Fig 9-11 shows the results of control
waveform for all the 9 Bi-directional Switches from
„SRr‟ to „SBb
‟
(MRr to MBb) with the maximum voltage
transfer ratio „q‟ =0.866. Fig.12. shows the Input
waveform for „q‟=0.866 and Amplitude =325.26V
related to „r‟ Phase. The Output Voltage and current
waveforms in „r‟ Phase for „q‟=0.866 as shown in
Fig.13&14. The Output Voltage and current
waveforms in „y‟ Phase for „q‟=0.866 as shown in
waveforms in „b‟ Phase for „q‟=0.866 as shown in
Fig.17&18. Fig.19 shows the Simulation waveform
for Voltage Transfer ratio of „q‟=0.866. Fig.20.
shows the Simulation waveform for „THD‟ in „r‟
Phase. Fig.21. shows the Average Output Voltage
waveform for 3 phase to 3 phase Matrix converter
(for „r‟, „y‟, „b‟ Phases). Similarly, Fig.22 shows the
Output Current waveform for 3 phase to 3 phase
Matrix converter (for „r‟, „y‟, „b‟ Phases). The
average output voltage is =325.26V and the average
output current is 24.8 Amps.
Fig.9. Duty cycle „q‟=0.866 for MRr, MYr, MBr Phase.
Fig.10. Duty cycle „q‟=0.866 for MYy,MRy,MBy Phase.
Fig.11. Duty cycle „q‟=0.866 for MRb,MYb,MBb Phase.
Fig.12. Input waveform for „q‟=0.866 and Amplitude
=325.26V in „r‟ Phase
Fig.13. Output Voltage waveform for „q‟=0.866 in „r‟
Phase.
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MRr
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MYr
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MBr
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MRy
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MYy
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MBy
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MRb
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MYb
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
Time in m.Sec
AmplitudeinVolts
MBb
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-300
-200
-100
0
100
200
300
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-300
-200
-100
0
100
200
300
400
Time in m.Sec
AmplitudeinVolts

Fig.14. Output current waveform for „q‟=0.866 in „r‟
Phase.
Fig.15. Output Voltage waveform for „q‟=0.866 in
„y‟ Phase.
Fig.16. Output current waveform for „q‟=0.866 in „y‟
Phase
Fig.17. Output Voltage waveform for „q‟=0.866 in
„b‟ Phase.
Fig.18. Output current waveform for „q‟=0.866 in „b‟
Phase.
Fig.19. Simulation waveform for Voltage Transfer
ratio „q‟=0.866.
Fig.20. Simulation waveform for „THD‟ in „r‟ Phase.
Fig.21. Output Voltage waveform for 3 phase to 3
phase Matrix converter („r‟, „y‟, „b‟ Phases)
Fig.22. Output Current waveform for 3 phase to 3
5.2. Simulation output of 3 phase to 3 phase
Matrix converter for Minimum Modulation Index
(0.5)
Simulations are performed for minimum voltage
transfer ratio „q‟ = 0.5 (Duty cycle), Amplitude
=325.26V and time limit is 0.1 m.Sec. The output is
realized with 3 phase passive RL load for R= 10 Ω
and L= 20 mH. Fig 23-25 shows the results of control
waveform for all the 9 Bi-directional Switches from
„SRr‟ to „SBb
‟
(MRr to MBb) with the minimum voltage
transfer ratio „q‟ =0.5. Fig.126. shows the Input
waveform for „q‟=0.5 and Amplitude =325.26V
related to „r‟ Phase. The Output Voltage and current
waveforms in „r‟ Phase for „q‟=0.5 as shown in
waveforms in „y‟ Phase for „q‟=0.5 as shown in
waveforms in „b‟ Phase for „q‟=0.5 as shown in
Fig.31&32. Fig.33 shows the Simulation waveform
for Voltage Transfer ratio of „q‟=0.5. Fig.34. shows
the Simulation waveform for „THD‟ in „r‟ Phase.
Fig.35. shows the Average Output Voltage waveform
for 3 phase to 3 phase Matrix converter (for „r‟, „y‟,
„b‟ Phases). Similarly, Fig.36 shows the Output
Current waveform for 3 phase to 3 phase Matrix
converter (for „r‟, „y‟, „b‟ Phases). The average
output voltage is =325.26V and the average output
current is 7.955 Amps.
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
30
Time in m.Sec
CurrentinAmps
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-300
-200
-100
0
100
200
300
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
30
Time in m.Sec
CurrentinAmps
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-300
-200
-100
0
100
200
300
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
30
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.5
0
0.5
1
1.5
2
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-3
-2.5
-2
-1.5
-1
-0.5
0
0.5
x 10
15
Time in m.Sec
MagnitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-300
-200
-100
0
100
200
300
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-40
-30
-20
-10
0
10
20
30
Time in m.Sec
CurrentinAmps

Fig.23. Duty cycle „q‟=0.5 for MRr, MYr, MBr Phase
Fig.24. Duty cycle „q‟=0.5 for MYy, MRy, MByPhase
Fig.25. Duty cycle „q‟=0.5 for MRb, MYb, MBb Phase.
Fig.26. Input waveform for „q‟=0.5and Amplitude
=325.26 V in „r‟ Phase
Fig.27. Output Voltage waveform for „q‟=0.5 in „r‟
Phase.
Fig.28. Output current waveform for „q‟=0.5 in „r‟
Phase
Fig.29. Output Voltage waveform for „q‟=0.5 in „y‟
Phase.
Fig.30. Output current waveform for „q‟=0.5 in „y‟
Phase
Fig.31. Output Voltage waveform for „q‟=0.5 in „b‟
Phase
Fig.32. Output current waveform for „q‟=0.5 in „b‟
Phase.
Fig.33. Simulation waveform for Voltage Transfer
ratio „q‟=0.5
Fig.34. Simulation waveform for „THD‟ in „r‟ Phase
Fig.35. Output Voltage waveform for 3 phase to 3
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.2
0
0.2
0.4
0.6
0.8
Timeinm.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-300
-200
-100
0
100
200
300
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-200
0
200
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
Time in m.Sec
CurrentinAmps
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-200
0
200
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
Time in m.Sec
CurrentinAmps
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-200
0
200
400
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
30
Time in m.Sec
CurrentinAmps
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-0.5
0
0.5
1
1.5
Time in m.Sec
AmplitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-2
-1
0
1
2
3
4
5
x 10
16
Time in m.Sec
MagnitudeinVolts
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-400
-200
0
200
400
Time in m.Sec
AmplitudeinVolts

Fig.36. Output Current waveform for 3 phase to 3
TABLE-1 Output current for different MI
Modulation
Index MI (q)
Average
Output
Current
Average
Output
Voltage
Type
of
Load
0.50 7.955 325.26
RL
Load
0.575 12.03 325.26
0.65 17.79 325.26
0.70 19.64 325.26
0.75 21.65 325.26
0.80 23.17 325.26
0.866 24.80 325.26
As a result, by increasing Modulation Index will
increases the average output current without change
in average output voltage as shown in TABLE-1.
Also the average output current will increases by
increasing the value of load resistance. Similarly, the
output current increases by decreasing the value of
load Inductance
VI. CONCLUSION
A simulation design and implementation of 3
phase to 3 phase Matrix converter has been presented
in this paper. A mathematical model is developed for
open loop Matrix converter using
MATLAB/Simulink so as to achieve less
computational time. The output was realized by RL
load and the simulation results are taken for
maximum and minimum voltage transfer ratio. The
simulation output results are satisfactory and the
future extension of this paper is possible for closed
loop configuration with various controllers and three
phase to „n‟ phase Matrix converter with various
passive loads and different voltage transfer ratio.
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[3]. Rene Vargas, Ulrich Ammann and Jose
Rodriguez, “Predictive approach to increase
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matrix converter”, IEEE Transactions on
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2009.
[4]. An dreas Ecklebe, Andreas Lindemann
and Sebastian, “Bidirectional switch
commutation for a Matrix converter
supplying a series resonant load”, IEEE
Transactions on Power Electronics, Vol.24,
No.5, May 2009.
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0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
-30
-20
-10
0
10
20
30
Time in m.Sec
CurrentinAmps

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