ABSTRACT
This paper deals with a highly reliable electrical drive
utilizing the Brushless DC Motor (BLDC). The motor is fed by Voltage source
Inverter (VSI) with a dc-dc converter power factor correction circuit (PFC) as
the VSI’s predecessor. The Performance of two dc-dc converters (cuk and sepic
as PFC) are analyzed and the results are discussed to arrive at the best suited
converter. Fuzzy Logic Controller is used as the Intelligent Controller for the
BLDC motor. Reliable, low cost arrangement is thus provided to achieve unity
power factor and speed regulation with accuracy. The drive has been simulated
using the MATLAB/Simulink environment and the performance has been studied.
KEYWORDS:
1.
Brushless DC
Motor (BLDC)
2.
Power Quality
(PQ)
3.
Power factor
correction (PFC)
4.
Cuk converter
5.
Sepic
converter
6.
Fuzzy logic
controller (FLC).
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig. 1. Block diagram
SIMULINK
MODEL DIAGRAMS:
Fig. 2. PFC cuk fed BLDC
Fig. 3. PFC Sepic fed BLDC
EXPECTED SIMULATION RESULTS:
Fig. 4. Input power factor
Fig. 5. Cuk Converter Efficiency
Fig. 6. Motor Speed
Fig. 7. Input power factor
Fig. 8. Sepic Converter Efficiency
Fig. 9. Motor Speed
CONCLUSION
The
power factor correction has been successfully implemented using the cuk and
sepic converter. It shows a much improved result as it not only provides better
power quality, but also the converter removes the necessity to smooth out the
dc output from ripples. The fuzzy logic controller widely increases application
range of the motor by increasing the reliability. The motor is presently used
in areas such as aerospace, aircraft and mining applications because of the enhanced
reliability that the motor offers. This is further enhanced by the usage of FLC
and the PFC converters. The FLC is used to control the motor speed and the cuk
or sepic converter is used for the power factor improvement. It is found that
the sepic converter is found to provide better power quality. The Analysis has
been done for Continuous conduction in the sepic and cuk converters as both are
not capable of self PFC.
REFERENCES
[1] R.Shanmugasundram,
K. Muhammad Zakariah and N. Yadaiah, “Implementation and Performance Analysis
of Digital Controllers for Brushless DC Motor Drives,” IEEE/ASME Trans.
Mechatronics, vol. 19, no. 1, Feb. 2014.
[2] T.
Kenjo and S. Nagamori, Permanent Magnet Brushless DC Motors.Oxford,
U.K.: Clarendon Press, 1985.
[3] Sanjeev
Singh and Bhim Singh, “A Voltage-Controlled PFC Cuk Converter-Based PMBLDCM
Drive for Air-Conditioners,” IEEE Trans. Ind. Appl. vol. 48, no. 2, Mar.
/Apr. 2012.
[4] Vashist
Bist and Bhim Singh, “PFC CUK Converter-Fed BLDC Motor Drive,” IEEE Trans.
Power Electron., vol. 30, no 2, Feb. 2015.
[5] “Limits
for harmonic current emissions (equipment input current≤16 A per
phase),” International Standard IEC 61000-3-2, 2000
