Sensorless speed and position estimation of a PMSM

Student thesis: Master thesis (including HD thesis)

  • Cesar Hernaez Ojeda
4. term, Energy Engineering, Master (Master Programme)
This Project focuses on investigating the sensorless speed and position estimation control of a Surface Mounted Permanent Magnet Syn-chronous Machine for medium and high speed,proposing a bandwidth for
dierent steady and dynamic states and investigating about the angular estimation position error. Back-EMF method is used to estimate the position, and Phase Loop Lock (PLL) method is used to estimate the speed. An Auto-tuning is designed for both in order to achieve good performance based on the bandwidth and the position error.
A Field Oriented Control (FOC) system was designed which is know to give good results andgood dynamic performance. A VSI controls the machine currents using Space Vector Modula-tion (SVM). First The literature is searched for a suitable Back-EMF sensorless control method, position error and bandwidth. Then the selected best methods are implemented and tested in the simulation. The overall selected control system is tested in the laboratory setup and compare the sensorless control strategy with the sensored control.
SpecialisationPower Electronics and Drives
Publication date3 Jun 2014
Number of pages75
Publishing institutionAalborg University
ID: 198473568