Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Sensorless Control of BLDC Motor using d-q Synchronously Rotating Reference Frame Concept
Authors Jong-Joo Moon ; Hong-Jun Heo ; Jang-Mok Kim
DOI 10.6113/TKPE/2015.20.3.232
Page pp.232-238
ISSN 1229-2214
Keywords Brushless dc motor; Sensorless control; Current modeling sensorless
Abstract A sensorless control algorithm of brushless DC (BLDC) motors with a model current based on 120 degree conduction mode is proposed in this paper. The rotor speed and position can be estimated using the current model of BLDC motor, which is a modified version of the conventional current model of permanent magnet synchronous motor. The rotor speed and position can be obtained using the difference of the actual current and the model current. The position error caused by the parameter errors of the model current is compensated using a PI controller and the feedback loop of the real current. The validity of the proposed sensorless control algorithm is verified through simulation.