Position Sensorless Control of PMSM Based on Current Phase Convergence Method

Abstract

This paper proposes a new position sensorless control method for permanent magnet synchronous motors based on current phase convergence. The basic idea of the proposed method is using the instantaneous power based on the p-q theory, which is used in reactive power compensators. The results show that the current phase in d-q coordinate can be estimated using the instantaneous power. Moreover, a new rotor position estimation method has been proposed and validated via simulations and experiments.