Peak Current Detection Starting based Position Sensorless Control of BLDC Motor Drive Academic


Peak Current Detection 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.


Peak Current Detection 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.


Peak Current Detection 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.


  1. Peak Current detection based starting
  2.  Position sensorless control
  3. Incremental Conductance MPPT Algorithm
  4. PMBLDC motor drive
  5. Water pumping



Fig.1 System configuration of position sensorless brushless DC motor drive operated aqua pumping


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


Peak Current DetectionPosition 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.


[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

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