ABSTRACT:
The
paper presents a space-vector pulse width modulation (SVPWM) inverter feeding a
permanent-magnet synchronous motor (PMSM). The SVPWM inverter enables to
feedthe motor with a higher voltage with low harmonic distortions than the
conventional sinusoidal PWM inverter. The control strategy of the inverter is
the voltage / frequency control method, which is based on the space-vector
modulation technique. The proposed PMSM drive system involving the
field-oriented control scheme not only decouples the torque and flux which
provides faster response but also makes the control task easy. The performance
of the proposed drive is simulated. The advantages of the proposed drive are
confirmed by
the
simulation results
KEYWORDS:
1.
Permanent-magnet synchronous motor
2.
Space-vector PWM inverter
3.
Voltage/frequency control
SOFTWARE: MATLAB/SIMULINK
CIRCUIT DIAGRAM:
Fig. 1
Three-phase VSI bridge circuit
EXPECTED SIMULATION RESULTS:
(a) voltage
waveform
(b)
voltage spectrum (peak value) and THD
Fig. 2 Phase voltage of the motor at fo=50 Hz and M= 0.38
(a) voltage waveform
(b) voltage spectrum (peak value) and THD
Fig.3 Line voltage of the motor at fo=50 Hz and M=0.38
Fig. 4 Locus of reference input
voltage vector in the (α − β ) plane
Fig. 5 Locus of
actual output voltage vector in the (α − β ) plane
(a)
current waveform
(b) current spectrum (peak value)
and THD
Fig. 6 Current of the motor at fo=50 Hz,M=0.38, and T=1.5 N.m
(a) current waveform
(b)current spectrum (peak value) and THD
Fig. 7 Current of the motor at fo=50 Hz, M=0.38, and T=3 N.m
Fig. 8
Speed response of the motor drive system at load T=3 N.m
CONCLUSION:
In
this paper, a SVPWM-PMSM drive has been introduced. The SVPWM inverter is used
to offer 15%increase in the output voltage and low output harmonic distortions
compared with the conventional sinusoidal PWM inverter. The control strategy of
the SVPWM inverter is the voltage/frequency control method which is based on
the space-vector modulation technique for constant torque operation. The
advantages of the proposed drive are confirmed by the simulation results.
REFERENCES:
[1]
R. Arulmozhiyal, and K. Baskaran, "Space vector pulse width modulation based
speed control of induction motor using fuzzy PI controller, " International
Journal of Computer and Electrical Engineering, vol. 1, no. 1, April 2009,
pp. 98-103
[2] Z. Wang, J. Jin, Y. Guo, and J. Zhu,
"SVPWM techniques and applications in HTS PMSM machines control," Journal
of Electronic Science and Technology of China, vol. 6, no. 2, June
2008, pp. 191-197.
[3]
A. Maamoun, A. Soliman, and A. M. Kheirelden, "Space-vector PWM inverter
feeding a small induction motor," in Proc. IEEE Int. Conf.
onMechatronics, Komamoto, Japan, May 2007, pp. 1-4.
[4]
W. Kaewjinda, and M. Konghirun, "Vector control drive of permanentmagnet
synchronous motor using resolver sensor," ECTI Trans. Electrical
Eng., Electronics, and Communications, Thailand, vol. 5, no. 1, Feb. 2007,
pp. 134-138.
[5]
M. Štulrajter, V. Hrabovcová, and M. Franko, "Permanent magnets synchronous
motor control theory,"Journal of Electrical Engineering,Slovak
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