Solar PV-Fed Reverse Saliency Spoke-Type PMSM With Hybrid ANF-Based Self-Sensing for Water Pump System

In this work, a reverse saliency (RS) spoke-type permanent magnet (PM) synchronous motor (PMSM) besides its hybrid adaptive notch filter (HANF)-based self-sensing for driving a solar photovoltaic water pump system (WPS) is presented. The conventional spoke-PMSM-driven WPS experiences two types of problems. First, the motor is operated with a flux-weakening current to produce positive reluctance torque, thereby increasing the PM demagnetization risk. Second, an encoder is used to sense the rotor angle, which, in turn, affects the cost and reliability. To solve the first problem, the RS-PMSM is presented, which operates with a flux-intensifying current to produce positive reluctance torque, while the second issue is resolved by using the HANF-based rotor angle estimation. Although conventional methods give an estimate of rotor angle, they do not eliminate both the dc offset and dominant harmonics. The superiority of both the RS-PMSM and HANF over existing solutions is shown, respectively, by using finite-element methods and MATLAB-/Simulink-based performances. Besides, a prototype motor is also manufactured. The performance of the RS-PMSM prototype along with its HANF-based self-sensing is obtained in the laboratory, and various test results are reported. Meanwhile, a comparison of the HANF with available self-sensing techniques is also performed.