Gradient Detection Starting Controlled Photovoltaic Sourced BLDCM Drive without Position Sensors

In this method, an initial accurate rotational direction control along with starting current control is implemented. No current sensor is used for mechanical rotor position estimation to make the system cost effective as it is mainly designed for agricultural applications. The reliability and dynamic performance of the system are validated through both simulation and experimental results on a laboratory prototype and in industrial test facility using commercial prototype with low cost Delfino DSP processor. The economical solution proves best fit for agricultural as well as household purpose water pumping.

Index Terms—Position sensorless, solar photovoltaic (SPV), permanent magnet brushless DC (PMBLDC) motor, reduced current sensor, industrial product prototype.