Use HF Signal Injection for Simultaneous Rotor Angle, Torque and Temperature Estimation in PMSMs
Marcos Orviz, David Reigosa, Diego F. Laborda, María Martínez Gómez, Juan Manuel Guerrero Munoz, Fernando Briz · 2021
Use of high frequency (HF) signal injection-based methods with PMSMs has been widely investigated for several purposes including rotor angle/speed estimation, permanent magnet (PM) temperature estimation and torque estimation. This paper analyses the opportunities of multi-estimation. The physics behind these methods are analyzed, from which the number and characteristics of the HF signals to be injected can be deduced. Based on this, injection of a pulsating HF current 45° shifted from the d- axis and a rotating HF current in the stationary reference frame is found to be a suitable solution for simultaneous rotor angle, torque and magnet temperature estimation.11This work was supported in part by the Research, Technological Development and Innovation Programs of the Spanish Ministry of Science and Innovation, under grant PID2019-106057RB-I00.