This document discusses a project to simulate an SVPWM inverter to reduce total harmonic distortion and control the speed of a 3-phase induction motor. The objectives are to reduce THD and achieve variable frequency speed control of the induction motor using space vector modulation. The system takes a speed setpoint as input, calculates the slip frequency, and uses constant V/f control to determine the required voltage output. Simulation results will compare THD, output voltage, and switching losses of SVPWM to conventional methods. Controllers like PI, PD and PID will also be compared for better speed response of the induction motor.

1. SIMULATION OF SVPWM INVERTER TO REDUCE TOTAL THD
ON 3- PHASE INDUCTION MOTOR
PROJECT ASSOCIATES:
K. SHARMILA 19B01A0262​
M. DEVI VINEELA 19B01A0265​
P. VINEELA 19B01A0287​
S.N.V.L. PRASANNA 19B01A02A0​
S. GOWRI PRIA 20B05A0213​
PROJECT GUIDE:
Mr. N. V. RAMANA
Assistant Professor/EEE
Review - 1
Department of EEE
Shri Vishnu Engineering College For Women
(Autonomous)
Simulation

2. INTRODUCTION
2
The electric motor has replaced motor fuel as the main mover of the
equipment. One of them is the use of a three-phase induction motor in the
industrial sector. The induction motor speed can be changed by changing
the number of poles, the stator voltage, and the frequency source. This
method has many disadvantages, such as changes in motor dimensions and
the occurrence of flux saturation. By using SVPWM method the speed of
a three-phase induction motor can be controlled with constant V/f.

3. 3
PROBLEM STATEMENT
• Total harmonic distortion (THD) quantifies the unwanted harmonics
that are present in the voltage or current waveforms. THD analysis is
crucial for maintaining and enhancing power system stability. It
should be reduced to improve efficiency. The speed control is also
important for induction motors to improve working.

4. 4
OBJECTIVE OF THE PROJECT
• The main objective of the project is to reduce the Total Harmonic
Distortion (THD) and to control the speed of the three phase
induction motor.To achieve the V/f speed control of induction motor
Space Vector method is used. Space Vector Modulation (SVM)
Technique was originally developed as a vector approach to Pulse
Width Modulation (PWM) for three- phase inverters.
• SVPWM is a technique for generating sine wave that provides a
higher voltage to the motor with lower total harmonic distortion

5. BASE PAPER EXPLANATION
The paper implements a constant V/f based speed control system using an
inverter SVPWM.
The system has a speed setpoint input.
The setpoint value is converted into the slip frequency and then fed to
constant V/f control to determine the required voltage.
The output of constant V/f control form a three-phase sinusoidal wave.

6. 6
INDUCTION MOTOR SPECIFICATIONS
MOTOR PARAMETERS SPECIFICATIONS
Rotor Type Squirrel -cage
Speed 1440 rpm
Power 7.5KW
Voltage 400V
Frequency 50 HZ
Mechanical Input Speed w

7. 7
BLOCK DIAGRAM
DC
SOURCE
INVERTER
SPEED
OF IM
RPM PI
SVPWM

8. RELEVANT CIRCUIT
DIAGRAM
Three Phase inverter circuit

9. WORK PROGRESS FROM PREVIOUS
REVIEW
• Worked on usage of matlab tools and required installation products.
• We have worked on simulation of PWM Inverter, two phase Inverter
and Induction motor.
• Obtained relevant waveforms of simulation.

10. COMPARISION OF CONVENTIONAL TO
PRESENT ONE
• According to the conventional paper, current THD, output voltage,
and switching losses of svpwm are observed.
• In present ,PI, PD, PID controllers are used and compared to use a
controller for better response of change in speed of Induction motor

11. 1
1
REFERENCES
• Z. B. Duranay, H. Guldemir, and S. Tuncer, “Implementation of a
v/f controlled variable speed induction motor drive,” EMITTER
International Journal of Engineering Technology, vol. 8, pp. 35–
48,Jun. 2020
• R. Bharti, M. Kumar, and B. M. Prasad, “V/f control of three
phase induction motor, ” in 2019 International Conference on
Vision To- wards Emerging Trends in Communication and
Networking (ViTECoN), pp. 1–4, 2019.
• C. Tigade and M. Sreejeth, “Implementation of v/f adjustable
speeddrive for induction motor using dspace ds1104,” in 2nd
IEEEInternational Conference on Power Electronics, Intelligent
Control andEnergy Systems (ICPEICES), pp. 938–943.

12. 1
2
THANK YOU