Title :
Sensorless vector control of induction motor at zero frequency
Author :
Takeshita, Takaharu ; Nagatoshi, Yoshiki ; Matsui, Nobuyuki
Author_Institution :
Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol., Japan
Abstract :
This paper presents a sensorless vector control scheme for low speed drive. The sensorless algorithm is based on the estimation of the secondary speed EMF that leads the secondary magnetic flux by an angle of π/2. This sensorless algorithm as similar to other algorithms has a problem in zero stator frequency operation. To avoid this problem, the fluctuated reference of the secondary flux is used at zero frequency and the stable estimation of the secondary speed EMF is realized. The effectiveness of the proposed scheme has been confirmed by experiments
Keywords :
angular velocity control; induction motor drives; machine vector control; parameter estimation; 2.2 kW; 4-pole motor; fluctuated excitation current; induction motor; low speed drive; secondary magnetic flux; secondary speed EMF estimation; sensorless vector control; speed sensorless vector control; stable estimation; zero frequency; zero stator frequency operation; Equations; Equivalent circuits; Frequency estimation; Induction motors; Machine vector control; Rotors; Sensorless control; Stators; Steady-state; Voltage;
Conference_Titel :
Power Conversion Conference, 2002. PCC-Osaka 2002. Proceedings of the
Conference_Location :
Osaka
Print_ISBN :
0-7803-7156-9
DOI :
10.1109/PCC.2002.997883
