| 摘要 |
<p>A method of correcting the stator flux estimate midpoint in alternating-current systems, the method comprising the step of determining a stator flux estimate ( PSI s, est). The method is characterized in steps of forming the sum of the squares of the rectangular components ( PSI sx, est, PSI sy, est) of the stator flux estimate to obtain a reference variable (k), low-pass filtering the reference variable (k) in order to obtain a low-frequency component (kfilt) of the reference variable, subtracting the low-frequency component (kfilt) from the reference variable (k) in order to obtain a difference variable (e), determining rectangular correction term components ( PSI sx, corr, PSI sy, corr) of the stator flux estimate PSI s, est) by multiplying the difference variable (e) by the rectangular components PSI sx, est, PSI sy, est) of the stator flux estimate and a correction coefficient (K PSI corr), and forming a midpoint-corrected stator flux estimate ( PSI s, fin) by adding the correction term components to the components of the stator flux estimate.</p> |
