2026-06-11T08:10:55.952Z http://ezaposleni.singidunum.ac.rs/rest/sciNaucniRezultati/oai

ezaposleni.singidunum.ac.rs/rest/sciNaucniRezultati/oai:2:6872 2019-05-22T08:53:22Z 2

Sensorless position estimation for slotless surface mounted permanent magnet synchronous motors in full speed range 2019 http://ezaposleni.singidunum.ac.rs/rest/sciNaucniRezultati/oai/record/2/6872 https://ieeexplore.ieee.org/abstract/document/8678476 C. Zhao M. Tanasković F. Percacci S. Mariethoz P. Gnos This paper presents a scheme for rotor position estimation from standstill to nominal speed. The proposed scheme is particularly suited for surface mounted permanent magnet synchronous motors and for slotless permanent magnet synchronous motors with completely smooth cylindrical rotor, which cannot be operated sensorless with state-of-the-art methods properly from standstill. At standstill and very low speed, the position is estimated by using signal injection. A systematic distortion in the position estimation that is due to asymmetries in the motor parameters is identified and compensated. The rotor polarity is identified by a special process based on the estimation of the back electromotive force (back-emf) induced by a minimal rotor motion. At high speed, the position is estimated by using a linear back-emf observer. Different observer gains are used at different speed ranges, so that the position estimate is reliable even at low speed. The combination of these two approaches enables sensorless motor control in the full speed range including standstill. Experiments demonstrate the accuracy of the proposed estimation scheme and its robustness under different thermal conditions. This paper is accompanied by two videos demonstrating sensorless operation. article Transactions on Power Electronics 1 1 0885-8993 IEEE TRANSACTIONS ON POWER ELECTRONICS