Title :
Analysis of position estimation method for switched reluctance drives
Author :
Al-Bahadly, Ibrahim H.
Author_Institution :
Massey Univ., Palmerston North, New Zealand
Abstract :
A sensorless rotor position measurement method for switched reluctance (SR) motors is presented. The method is based on estimating a particular rotor position on phase by phase basis and measuring flux linkage and current when the estimated position is reached. By comparing the measured flux linkage with the pre-stored flux linkage corresponding to the particular position for the measured current, the angular difference between the estimated position and the particular position can be calculated. The method is applied to two practical systems, the first being a 0.3 kW 10000 rpm 3-phase 6/4 SR motor with a variable load and the second being a 1 kW 1500 rpm 3-phase 12/8 SR motor with a fan load. The paper examines the theoretical stability of the measurement and shows that measurement errors are not compounded and act as variable disturbance to the system
Keywords :
electric current; magnetic flux; measurement errors; position measurement; reluctance motor drives; rotors; 0.3 kW; 1 kW; current measurement; fan load; flux linkage measurement; measurement errors; measurement stability; position estimation method analysis; pre-stored flux linkage; rotor position; sensorless rotor position measurement method; switched reluctance drives; three-phase SR motor; variable load; variable system disturbance; Couplings; Current measurement; Particle measurements; Phase estimation; Phase measurement; Position measurement; Reluctance motors; Rotors; Stability; Strontium;
Conference_Titel :
Electronic Design, Test and Applications, 2002. Proceedings. The First IEEE International Workshop on
Conference_Location :
Christchurch
Print_ISBN :
0-7695-1453-7
DOI :
10.1109/DELTA.2002.994626
