To increase the stability of system using SPWM To design the low cost system To provide the voltage and frequency according to requirement

1. 1
A
Presentation
On
Variable Voltage Variable Frequency Power Source using
Sinusoidal PWM
By:
Miss. Apurva Pandurang Patil
M.Tech (Electronics)

2. Contents
Introduction
Comparative study
Project objective
Block diagram of system
Selection of component
Design of the Hardware
Design of the software
Result
Conclusions
References
2

3. Introduction
 Efficient use of available power for various type of
demand
 Requirements- dedicated types of power sources
 Specified in form of generation of ac sources
 Power quality problems –new generation
equipment's
 Hence high quality VVVF power sources
3

4. COMPARATIVE STUDY
Paper-Author name Overview
R. K. Pongiannan, P.
Selvabharathi, N. Yadaiah
presented, “FPGA Based
Three Phase Sinusoidal
PWM VVVF Controller”
developed the SPWM control in a single
FPGA. The simulations :ModelSim 5.7
implementation :using Xilinx
The PWM patterns have been achieved for
different switching and fundamental
frequencies.
Salimi, S.Mansourpour,
H.Ziar, E.Afjei has
introduced , “A Simple and
Novel Modulation
Technique Used to Obtain
Output Voltage Having a
Frequency Multiple of Input
Voltage Frequency”
new modulation method that can be
adopted to obtain various possible output
voltages depending on the switching
topology and the voltage inputs available.
4

5. Paper-Author
name
Overview
Lin Chengwu,Liu Yan ,
Sun Bingbin ,“Study
On The Technology Of
Inverter Based On
DSP And SPWM”
SPWM to three-phase ,based on DSP
chip, This system provides high
quality and reliability of SPWM
waveform, and output waveform of
the variable frequency
Mriganka Sekhar Sur ,
S. N. Singh,
Anumeha, Puspa
Kumari , “Simulation
And Generation Of
SPWM Waveform
Using VHDL For FPGA
Interfaced H Bridge
Power Inverter”,
novel scheme for SPWM
SPWM switching pulses using Direct
Modulation Strategy and its
implementation has been done in
VHDL code. In DPWM pulses are
generated directly and thus require
less memory space. They used the
H-bridge invertor
5

6. Paper-Author
name
Overview
Lin Jiaquan, Pi Jun
devloped “A New Scheme
of VVVF Inverter Using
Line Voltage Direct PWM”
presents a new design for general
inverter using line voltage direct PWM
technique. This new scheme doesn’t
using high frequency signal. They used
DSP.
N. D. Patel and U. K.
Madawala developed “A
Bit-Stream Based PWM
Technique for Variable
Frequency Sinewave
Generation”,
design a unique technique suitable for
the generation of variable frequency.
Arithmetic operations on the bit
streams are performed through digital
blocks. The proposed technique is
implemented on the field
programmable gate array (FPGA).
6

7. Project objective
To increase the stability of system
using SPWM
To design the low cost system
To provide the voltage and
frequency according to
requirement
7

8. Block diagram of system
Fig.1 block diagram of system

9. PIC microcontroller 16F 877a
 High performance RISC CPU
operating voltage range (2.0V to 5.5V)
Number of I/O Lines: 33
Number of bits in ADC: 10 bit
A/D Channels Available: 8
Number of Timers: 3
10

10. Data ROM Size: 256 B
Program Memory :14.3KB
 RAM Size: 368 B
 Two Capture, Compare, PWM modules
 Interrupt capability (up to 18 sources)
11

11. TRIAC BTA 41
 High current TRIAC,On-state rms current: 41A
 Repetitive peak off-state voltage: 600 and 800 V
 Low thermal resistance
Bridge KBPC3510
 Voltage Range 50 to 1000 Volts
 Current 35 Ampere
 Integrally molded heat sink provide
 very low thermal resistance
12

12. MOSFET Drivers IR2110
 To drive N-channel power MOSFET in the high-side
configuration which operates up to 500 V
 Gate drive supply range from 10 to 20V
 The outputs produced are in phase with the inputs,
 Can drive independently high- and low-side referenced
output channels
MOSFETs IRFP460
 Fast Switching
 Drain-Source Voltage: 500V
 Continuous Drain Current:: 20A
 Simple Drive Requirements
13

13. Design of the Hardware
14

14. 1) Power Circuit
2) Control Circuit And Display Circuit,
3) Driver Circuit
4) Power Supply Circuit
5) Protection Circuit.
15

15. 1. Power Circuit
Triac
firing
FilterRectifier Inverter output
2. Control Circuit And Display Circuit
Pic controller
Display voltage and frequency
16
Fig.2 block diagram of power circuit

16. 3. Design of Power supply
 5V and 12V power supply
 5V power supply
4. Protection Circuit
17
Fig.3 power supply circuit

17. Design of the Software
18

18.  PIC microcontroller 1 - Variable Voltage
Zero Crossing Circuit
 PIC microcontroller2 - PWM Generation
Display
Variable Frequency
PIC microcontroller 1
PIC
microcontroller
Zc= RB0
AN0= variable voltage
RD0= output to gate
19
Feed back
from output
Fig. 4 block diagram of first PIC controller

19. LCD
PWM pulses
From step down
transformer=AN1 PIC
microcontroller
Variable
frequency=AN0
Frequency
scene
AN6
20
Fig. 5 block diagram of first PIC controller

20. Results 21
Fig.6 Waveform of TRIAC firing

21. Variable voltage 22
Fig. 7a High intensity of bulb
Fig. 7b Low intensity of bulb

22. SPWM 23
Fig. 8 SPWM pulses

23. 24
Variable Frequency
Fig. 9a sine wave at 40 Hz
Fig. 9b sine wave at 51Hz

24. Conclusions
Using controller cost of VVVF
system is reduce
SPWM gives more efficiency
System provide desired rang of
voltage and frequency range
27

25. References
 Panda A., Pathak M.K., Srivastava S.P., “An Improved Power Converter for
Standalone Photovoltaic System”, Annual IEEE India Conference (INDICON), 10.1109/
INDCON .2013. 6725917, 2013.
 Jaiswal, J.L., Biswas, A., Agarwal V., “Implementation of Single phase matrix
converter as generalized single phase converter”, 2nd International Conference on
Power, Control and Embedded Systems, 10.1109/ICPCES.2012. 6508123, 2012.
 R. K. Pongiannan1, Member- IEEE, P. Selvabharathi2, N. Yadaiah, Sr. Member-IEEE
“FPGA Based Three Phase Sinusoidal PWM VVVF Controller”, 978-1-61284-379-
7/11 ,2011 IEEE, 2011.
 A. Salimi, S. Mansourpour, H. Ziar, E. Afjei, “A Simple and Novel Modulation
Technique Used to Obtain Output Voltage Having a Frequency Multiple of Input
Voltage Frequency”, 978-1-4673-5003-7/11, 2011 IEEE, 2011.
 R. K. Pongiannan, Member- IEEE, P. Selvabharathi, N. Yadaiah, Sr. Member-IEEE, “FPGA
Based Three Phase Sinusoidal PWM VVVF Controller”, 978-1-61284-379-7/11,2011
IEEE, 2011.
 Vinay, K.C. ; Shyam, H.N. ; Rishi, S. ; Moorthi, S. ,” FPGA Based Implementation of
Variable-Voltage Variable-Frequency Controller for a Three Phase Induction
Motor”, Process Automation, Control and Computing (PACC),International Conference,
10.1109/PACC. 2011. 5978884, 2011.
 Sen, S., Datta, U.,” Mathematical Modelling of Sinusoidal Pulse Width Modulated
Signal and its Implementation on Microcontroller based Embedded System”,
India Conference (INDICON), Annual IEEE, 10.1109/INDCON.2010.5712735, 2010.
 Yang Ping, Shiping Yang ,” An Improved Algorithm for Harmonic Suppression of
VVVF”, Mechatronics and Automation, IEEE International Conference , 10.1109 /ICMA.
2005. 1626764, 2005.
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26. Thank You!!!
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