Adaptive Delay Signal Cancellation- Synchronous Reference Frame Phase-Locked Loop Based Position Sensorless Single Stage BLDC Motor Drive for Light Duty Electric Vehicle

This paper deals with development of a light duty electric vehicle (LDEV) drive train that utilizes a solar photovoltaic (PV) array and a battery in conjunction with a position sensorless brushless direct current (BLDC) motor. This design is tailored to meet requirements of Indian drive cycle. This method is well-suited for a broad range of speeds and enables optimal torque and current control. Rotor position estimation based on orthogonal flux components, is improved by utilizing a modified synchronous reference frame phase-locked loop (SRF-PLL), significantly mitigating commutation torque ripples. Enhanced disturbance rejection capability in phase-locked loops (PLLs) is achieved through implementation of diverse filtering techniques. Consequently, synchronous reference frame filter (SRF)-PLL is augmented with an in-loop filter known as delay-signal compensated (DSC) operator. Dynamic performance is improved with a reduction in current ripple. Furthermore, this system integrates regenerative braking by altering gate pulses to voltage source inverter (VSI) without requiring supplementary external configuration. Incorporating solar PV energy and regenerative braking mechanisms within drive structure enhances efficiency of EV propulsion and increases driving range. Single-stage implementation of MPPT control omits a need for an additional DC-DC converter, thereby reducing overall cost of system. Developed system is underwent validation through an experimental setup and is subjected to detailed analysis to determine its suitability under practical conditions.