Method for detecting a rotor position in Permanent Magnet Synchronous Motor

摘要

The present invention uses both a method of obtaining the rotor speed and position information using the Hall sensor and a method of estimating the position of the rotor using the PLL integrator, and an error of the rotor position information obtained through the above- The present invention provides a method of detecting a rotor position of a permanent magnet synchronous motor in which a speed and a rotor position based on the speed can be obtained by configuring a controller. To this end, the present invention comprises a first step of obtaining an average speed? _E based on a Hall sensor signal? _Hall ; A second step of interpolating an average speed? _E obtained through the first step with an interpolation method to obtain a rotor position? _R ; A third step of comparing the position of the rotor obtained through the output of the PLL (Phase Locked Loop) integrator with the position of the rotor obtained through the second step to obtain an error with respect to the rotor position; A fourth step of correcting the error so that the error obtained in the third step is 0 and obtaining the velocity through the error; And a fifth step of integrating the speed obtained in the fourth step to obtain the position of the rotor. The method of detecting a rotor position of a permanent magnet synchronous motor according to claim 1,