An asymptotically stable sensorless speed controller for non‐salient permanent magnet synchronous motors

Abstract

International audienceA solution to the longstanding problem of sensorless control of an electrical machine is provided in this paper. That is, the construction of an asymptotically stable controller that regulates the mechanical speed of the motor, measuring only the electrical coordinates. The result is presented for a non-salient permanent magnet synchronous motor perturbed by an unknown constant load torque. The proposed scheme is a fourth order nonlinear observer-based controller that does not rely onintrinsically nonrobustoperations like open-loop integration of the systems dynamical model nor signal differentiation and can be easily implemented in real time. The controller is easy to commission, with the tuning gains directly determining the convergence rates of the position, speed, and load torque observers. Simulation and experimental results are presented. In particular, a comparison with a sensorless field-oriented controller, recently proposed in the drives literature, is carried out

A new approach for estimation of electrical parameters and flux observation of permanent magnet synchronous motors

“…and the current i together with known voltage function v, we simulate the parameter estimator defined by (10), (12), (20), (21) and (29).…”

Аdaptive flux observer for permanent magnet synchronous motors

“…Вышеуказанные проблемы естественным образом мотивируют развитие бессенсорных алгоритмов для синхронных двигателей и представлены в многочисленных работах специалистов в области электри-ческих машин, а также систем управления (см., например, [1][2][3][4][5][6][7][8]). В настоящей работе мы будем развивать подход, опубликованный в [7].…”

“…В [5] этот подход в задаче синтеза наблю-дателя совмещен со специальным способом оценивания линейной скорости и стандартным регулятором, который часто используется в приложениях, обеспечивая удовлетворительные экспериментальные ре-зультаты. Такой наблюдатель также использован в [2,3,10].…”

Velocity-sensorless tracking control and identification of switched-reluctance motors

“…Although the latter is fully justified, for instance in view of the torque-sharing approach-see Taylor (1992), the analysis of the stator control loop is not included in the former reference. Yet, there are many analytical results on sensorless control of other electrical machines such as induction motors-see Ibarra-Rojas, Moreno, and Espinosa-Pérez (2004) and Marino, Tomei, and Verrelli (2004), or permanentmagnet synchronous machines-Shah, Espinosa-Pérez, Ortega, and Hilairet (2012); Tomei and Verrelli (2011). In Dawson, Hu, and Burg (1998) a similar nonlinear controller is presented, however, the authors assume that the mechanical load-torque τ L is known and the model includes viscous friction; this considerably eases the stability analysis.…”