Peak Current Detection Starting Based Position Sensorless Control of BLDC Motor Drive for PV Array Fed Irrigation Pump


PV Array The generation of exact commutation to start the permanent magnet brushless direct current (PMBLDC) motor in position sensorless control mode is the most challenging task. A peak current detection starting algorithm based wide speed range position sensorless control for solar photovoltaic array fed PMBLDC motor drive for the irrigation water pumping is presented here. This starting algorithm controls the exact starting commutation along with the peak staring current.


An elimination of position sensor and current sensor for rotor position estimation makes the implemented drive compact and cost effective for agricultural application. The operation of the drive is first tested with simulation and the reliability is tested in the laboratory prototype as well as in compact industrial product prototype with cost-effective digital signal processor. The robustness of the system is verified with different simulation and test results at various operating conditions. The compact cost-effective solution fits perfect for low cost, demanding both irrigation and domestic water pumping.


  1. Incremental conductance (INC) maximum power point tracking (MPPT) algorithm
  2. Peak current detection based starting
  3. Permanent magnet brushless direct current (PMBLDC) motor drive
  4. Position sensorless control
  5. Water pumping



Fig. 1. System configuration of position sensorless brushless dc motor drive.


Fig. 2. Solar PV array performance. (a) Steady-state and starting performance

at 1000 W/m2 insolation. (b) Dynamic performance varying from 500 to

1000 W/m2.

Fig. 3. BLDC motor performance at sensorless scheme. (a) Zero starting and

steady-state performance at 1000 W/m2 irradiance. (b) Dynamic performance

varying from 500 to 1000 W/m2 irradiance.


A starting peak current controlled, smooth start, robust position sensorless control of a PMBLDC motor has been presented for solar powered pumping. The applied starting method takes care of the high starting inrush current to secure a good lifespan of the drive as well as the PMBLDC motor. The reduction of the position sensors makes the system compact and cost effective.


The reliability and robustness of the developed drive are verified with both laboratory and industrial product prototype using d-SPACE (1104) and TMS320F28377S DSP. The performance and efficiency of the solar MPPT and PMBLDC motor are captured using DSO and the same is presented here. It is seen that the efficiency of the solar MPPT is more than 99%. It is also observed that the starting method is reliable and effective to keep the initial starting current within the desired limit. A fast settling stable dynamic performance of the drive is also observed.


[1] A. Sen and B. Singh, “Peak current detection starting based position sensorless control of BLDCmotor drive for PV array fed irrigation pump,” in Proc. IEEE Int. Conf. Environ. Elect. Eng. Ind. Commercial Power Syst. Europe (EEEIC /I&CPS Europe), 2019, pp. 1–6.

[2] 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,” IEEE Trans. Power Electron., vol. 30, no. 9, pp. 4809–4818, Sep. 2015.

[3] L. An and D. D. Lu, “Design of a single-switch DC/DC converter for a PV-battery-poweredpumpsystem withPFM+PWMcontrol,” IEEE Trans. Ind. Electron., vol. 62, no. 2, pp. 910–921, Feb. 2015.

[4] 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,” IEEE Trans. Ind. Appl., vol. 50, no. 1, pp. 631–641, Jan./Feb. 2014.

[5] T.-H. Kim and M. Ehsani, “Sensorless control of the BLDC motors from near-zero to high speeds,” IEEE Trans. Power Electron., vol. 19, no. 6, pp. 1635–1645, Nov. 2004.

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