Sensorless Hybrid Solar PV-Battery Fed PMSM Driven LEV with Improved Speed Controller

Owing to an internal parameter variation of PMSM during operation and cost of position sensorless, an improved flux observer based sensorless PMSM drive with super-twisting sliding mode (STSM) based speed controller is presented in this paper. STSM controller is used in place of convention PI based speed controller to mitigate the speed fluctuation error. In addition to it, the speed of PMSM is controlled by sensorless field oriented control and SOGI-FLL based flux observer sensorless technique is used to enhance the flux estimation, which leads to improve the speed and position estimation. Moreover, high cost, range anxiety, and battery charging time are the main barriers to putting electric vehicles (EVs) into mass adaption over internal combustion engines vehicles. In this work, a PV-battery energy source is utilized to power PMSM and investigated performance to mitigate the former issues. In addition, a modified perturb and observe (P&O) with global peak finding capability is utilized find maximum power point even in partial shading condition. The presented system is simulated in Matlab and performance is verified.