| Title |
Sensorless Transition Algorithm of PM Synchronous Motor by Load Torque Estimation |
| Authors |
Dong-Hyun Kim ; Kwan-Yuhl Cho ; Hag-Wone Kim |
| DOI |
https://doi.org/10.6113/TKPE.2021.26.5.349 |
| Keywords |
PMSM; I-F control; Extended EMF sensorless control |
| Abstract |
Permanent magnet synchronous motors are mainly used in the traction of electric vehicle and home application products including air-conditioners and refrigerators. For sensorless control without rotor position sensors, I-F control is applied for initial starting at low speeds, and mode is changed to sensorless control when the rotor speed is sufficiently accelerated for estimating rotor position. When the mode is changed to the sensorless control from the open-loop starting, the initial integral value of the speed controller should be considered by load condition; otherwise, the transition to sensorless control may fail. The sensorless transfer algorithm of PM synchronous motor based on load condition for smooth transition is proposed. The performance of the proposed sensorless transfer algorithm was verified by experiments. |