Integrated Wireless Power Transfer for Energy Efficient Brushless DC Motor in Piping Networks

The article introduces a Wireless Power Transfer (WPT) system designed for Brushless DC (BLDC) motor-pump, contributing to SDG 7 by enhancing energy efficiency, reliable performance and promoting sustainable energy management in sealed inline pumping scenarios. The system efficiently transmits power wirelessly from a source to BLDC motor, eliminating the need for a dedicated motor control unit on the secondary side. Also, the primary WPT controller manages the speed and direction of the BLDC motor. It uses six LC tuning circuits and three orthogonal channels on the secondary side, regulating the secondary side inverter. Field-Oriented Control (FOC) ensures accurate direction and velocity regulation. The system uses the stagnation point of the Back EMF of the stator windings to determine the rotor position wirelessly, maintaining performance despite fluctuations in operating conditions. The prototype of 48 V, 500 W WPT BLDC motor pump system shows a remarkable system efficiency of 87.6% and maintains a rotational speed of 3000 rpm at a range of 100 mm.