| Title |
A Sensorless PMSM Control Using the Separation of Two Voltage Source |
| Authors |
Jin-Woo Ahn(Jin-Woo Ahn) ; Sung-Jun Park(Sung-Jun Park) ; Dong-Hee Lee(Dong-Hee Lee) |
| Keywords |
PMSM ; superposition ; sensorless |
| Abstract |
This paper presents a sensorless control strategy of a PMSM(Permanent Magnet Sycchoronous Motor). This method is very simple to compute the position angle of a rotor. A principle and a practical solution are described. A sensorless control algorithm is proposed to remove a mechanical position sensor. The theory is based on the superposition principle. The state equation of a motor is divided into two conditions: one is the state equation of exciting voltage and phase current in a constraint, the other is the state equation of back EMF(Electromotive Force) and phase current in a short circuit. Based on the analysis, short circuit current by back EMF is computed and then the information of position angle is calculated. The proposed method is verified by experimental results. |