Performance of a Vector-Controlled PMSM Drive without Using Current Sensors

Sai Shiva Badini, Vimlesh Verma, Mohd Tariq (), Shabana Urooj () and Lucian Mihet-Popa
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Sai Shiva Badini: Department of Electrical Engineering, National Institute of Technology Patna, Patna 800005, India
Vimlesh Verma: Department of Electrical Engineering, National Institute of Technology Patna, Patna 800005, India
Mohd Tariq: Department of Electrical Engineering, ZHCET, Aligarh Muslim University, Aligarh 202002, India
Shabana Urooj: Department of Electrical Engineering, College of Engineering, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
Lucian Mihet-Popa: Faculty of Information Technology, Engineering and Economics, Oestfold University College, 1757 Halden, Norway

Mathematics, 2022, vol. 10, issue 23, 1-18

Abstract: The current sensorless vector-controlled permanent-magnet synchronous motor (PMSM) drive using a single sensor (i.e., speed sensor) is presented in this work. The current sensors are removed, and the estimated currents are used to close the current loop to minimize the drive cost and make it fault-tolerant against current sensor failure. A classical vector-control PMSM drive requires at least three sensors, i.e., two current sensors and one speed/position sensor. This paper presents a new current estimation technique that is free from inverter switching states, an integrator, and differentiator terms. The drive is suitable for retrofit applications, as it does not require any additional hardware. The reference voltages ( v d s and v q s ) are used to estimate the rotor reference frame currents (i.e., i q s and i d s ). The presented algorithm depends on the stator resistance ( Ɍ s ). The online Ɍ s estimation algorithm is used for compensation to overcome the effect of the Ɍ s on the estimated currents. The sensitivity analysis for the currents against the speed is verified and presented. The speed loop is closed with actual speed information, which will try to maintain the reference speed under any circumstances. The proposed current sensorless PMSM drive was validated using MATLAB/Simulink and also verified on a hardware prototype. The presented technique was verified for various operation conditions, and some of the extensive results are presented.

Keywords: current estimation; speed sensor; PMSM; vector control (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
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