ABSTRACT:
a single stage position sensorless control based
solar power fed PMBLDC (Permanent Magnet Brushless DC) motor drive scheme for
irrigation pump is proposed in this paper. The proposed system is designed
without using any mechanical sensor to reduce the cost along with the
complexity of the system with optimum utilization of the solar Photovoltaic
(PV) power. The proposed system integrated with a PMBLDC motor drive coupled to
a water pump is controlled by an inverter input voltage sensing based position
sensorless control with high current detection and commutation point estimation
based starting to wide speed range control .Elimination of position sensor,
makes the system control compact and cheaper. The peak current estimation based
starting in sensorless mode, enables soft starting restricting high starting
current with reliability like sensor based operation. The proposed drive is tested
and validated on a developed laboratory prototype and its suitability is
justified with different test results under steady state and dynamic operating
conditions.
KEYWORDS:
1.
Peak Current detection
based starting
2.
Position sensorless control
3.
Incremental
Conductance MPPT Algorithm
4.
PMBLDC motor
drive
5.
Water pumping
SOFTWARE: MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig.1
System configuration of position sensorless brushless DC motor drive operated
aqua pumping
EXPECTED SIMULATION RESULT:
Fig.2
Solar PV Array Performance (a) Steady-state and Starting performance at 1000
W/m2 insolation (b) Dynamic performance varying from 500 W/m2 to 1000 W/m2
Fig.
3 BLDC motor performance at sensorless scheme(a)Zero starting and steady state
performance at 1000W/m2 irradiance(b)Dynamic performance varying from 500 W/m2 to
1000 W/m2 irradiance
CONCLUSION:
Position
sensorless control scheme of the BLDC motor has been presented for irrigation
pump application. Sensorless control scheme has been justified for adverse
environment application especially for rural areas. The performance of the proposed
configuration has been evaluated satisfactory for water pumping application at
different weather conditions.
REFERENCES:
[1] S. Jain, A. K. Thopukara, R. Karampuri and V. T.
Somasekhar, “A Single-Stage Photovoltaic System for a Dual-Inverter-Fed
Open-End Winding Induction Motor Drive for Pumping Applications, ” in IEEE Transactions
on Power Electronics, vol. 30, no. 9, pp. 4809-4818, Sept. 2015
[2] L. An and D. D. Lu, “ Design of a Single-Switch
DC/DC Converter for a PV-Battery-Powered Pump System With PFM+PWM Control, ” in
IEEE Transactions on Industrial Electronics, vol. 62, no. 2, pp. 910- 921,
Feb. 2015.
[3] J. V. M. Caracas, G. d. C. Farias, L. F. M.
Teixeira and L. A. d. S. Ribeiro, “ Implementation of a High-Efficiency,
High-Lifetime, and Low-Cost Converter for an Autonomous Photovoltaic Water
Pumping System, ” in IEEE Transactions on Industry Applications, vol.
50, no. 1, pp. 631-641, Jan.-Feb. 2014.
[4] Tae-Hyung Kim and M. Ehsani, “Sensorless control
of the BLDC motors from near-zero to high speeds, ” in IEEE Transactions on Power
Electronics, vol. 19, no. 6, pp. 1635-1645, Nov. 2004.
[5] S. Dusmez, A. Khaligh, M. Krishnamurthy, E. Ugur
and M. Uzunoglu, “Sensorless control of BLDCs for all speed ranges with minimal
components, ”International Aegean Conference on Electrical Machines and
Power Electronics and Electromotion, Joint Conference, Istanbul,
2011, pp. 626-631
