Energy-Efficient Sensorless PMSM Pump Drive with mGWO and Loss Model for Field Orientation Control Strategy

An adjustable pump speed drive is commonly employed to control the speed of the pump motor, achieve the appropriate flow rate, and maintain the fluid level. The electrical motor, power electronics converter, and control are the main elements of the pump motor drive (PMD). In terms of energy efficiency and reliability, pump drives with permanent magnet synchronous motors (PMSMs) and sensorless control have more alluring qualities. To increase the efficiency of PMSM-PMD, the optimum controls including loss minimization and modified grey wolf optimizer (mGWO) are employed. The model reference adaptive system (MRAS) control is often employed for sensorless PMSM-PMD owing to its simplicity, reliability, and good response. The PMSM core loss equivalent parameters are precisely analyzed in this article. Also, the loss model that considers core loss is used to calculate the link between power loss and reference d-axis stator current (I-ds). Further, for enhancing the efficiency, an optimal I-ds* value is injected in field orientation control (FOC). This proposed scheme increases the efficiency of the PMSM pump drive by up to 1.5 percent as compared to the conventional FOC strategy. A 2.2-kW PMSM drive is tested with the proposed control strategy using real-time interfacing controller dSPACE 1202 MicroLabBox. Also, the obtained results are validated in Matlab/Simulink environment.