In this paper speed of induction motor is controlled
which is fed from three phase bridge inverter. In this paper the speed of an
induction motor can be varied by varying input Voltage or frequency or both.
Variable voltage and variable frequency for Adjustable Speed Drives (ASD) is invariably
obtained from a three-phase Voltage Source Inverter (VSI). Voltage and frequency
of inverter can be easily controlled by using PWM techniques, which is a very
important aspect in the application of ASDs. A number of PWM techniques are
there to obtain variable voltage and variable frequency supply such as PWM,
SPWM, SVPWM to name a few, among the various modulation strategies SVPWM is one
of the most efficient techniques as it has better performance and output
voltage is similar to sinusoidal. In SVPWM the modulation index in linear region
will also be high when compared to other
KEYWORDS:
1. Adjustable
Speed Drive (ASD)
2. Voltage
source inverter (VSI)
3. Sinusoidal
PWM (SPWM)
4. Space
Vector PWM (SVPWM)
SOFTWARE: MATLAB/SIMULINK
Figure
2: SPWM Pulses
Figure
3: Inverter o/p line voltages
Figure
4: Motor Speed and Electromagnetic torque.
Figure
5: SVPWM output gate pulses
Figure
6:Open Loop Drive Speed response with TL=0
Figure
7: Open Loop Drive Speed response with different TL
Figure
8: SPWM based open loop drive Load Current THD
The simulation of
“Control of Induction Motor Drive Using Space Vector PWM” is carried out in
MATLAB/Simulink. The simulation has been done for open loop as well as closed control.
The appropriate output results are obtained. The variation of speed of
Induction Motor has been observed by varying the load torque in open loop
control and results are noted down in the table. Also observed that for the
change in input speed commands the motor speed is settled down to its final
value within 0.1sec in closed loop model.
REFERENCES:
[1]
Abdelfatah Kolli, Student Member, IEEE, Olivier Béthoux, Member, IEEE,
Alexandre De Bernardinis, Member, IEEE, Eric Labouré, and Gérard Coquery
“Space-Vector PWM Control Synthesis for an H-Bridge Drive in Electric Vehicles”
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 62, NO. 6, JULY 2013. pp.
2241-2252.
[2]Mr.
Sandeep N Panchal, Mr. Vishal S Sheth, Mr. Akshay A Pandya “Simulation Analysis
of SVPWM Inverter Fed Induction Motor Drives” International Journal of Emerging
Trends in Electrical and Electronics (IJETEE) Vol. 2, Issue. 4, April-2013. pp.
18-22 .
[3]Haoran
Shi, Wei Xu, Chenghua Fu and Yao Yang. “Research on Threephase Voltage Type PWM
Rectifier System Based on SVPWM Control” Research Journal of Applied Sciences,
Engineering and Technology 5(12): 3364-3371, 2013. pp. 3364-3371.
[4]K.
Mounika, B. Kiran Babu, “Sinusoidal and Space Vector Pulse Width Modulation for
Inverter” International Journal of Engineering Trends and Technology (IJETT) -
Volume4Issue4- April 2013. pp.1012-1017.
[5]K.
Vinoth Kumar, Prawin Angel Michael, Joseph P. John and Dr. S. Suresh Kumar.
“Simulation And Comparison Of Spwm And Svpwm Control For Three Phase Inverter”
ARPN Journal of Engineering and Applied Sciences VOL. 5, NO. 7, JULY 2010. pp.
61-74.
