Documents disponibles écrits par cet auteur

Average-value modeling of brushless DC motors with 120° voltage source inverter / Qiang, Han in IEEE transactions on energy conversion, Vol. 23 n°2 (Juin 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 423 - 432 Titre : Average-value modeling of brushless DC motors with 120° voltage source inverter Type de document : texte imprimé Auteurs : Qiang, Han, Auteur ; Samoylenko, N., Auteur ; Jatskevich, J., Auteur Année de publication : 2008 Article en page(s) : pp. 423 - 432 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Brushless  DC  motors;  commutation;  invertors;  nonlinear  equations;  permanent  magnet  machines;  stators;  switching  convertors;  synchronous  machines Résumé : This paper describes average-value modeling of brushless dc (BLDC) motor-inverter systems, which is challenging due to the complicated switching patterns of the stator currents. A new average-value model (AVM) that appropriately includes commutation and conduction subintervals of the BLDC motor with a 120deg inverter is presented. The proposed model is explicit and uses a proper qd model of the permanent magnet synchronous machine. The required commutation angle is represented as a nonlinear algebraic function, which is readily obtained from the detailed simulation. The studies conducted are based on two typical industrial motors with different electrical time constants, and include hardware measurements, detailed simulation, and comparison with a previously published AVM. The proposed model is shown to be more accurate in terms of both large and small-signal analysis and is applicable to both types of motors. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4505390&sortType%3Das [...] [article] Average-value modeling of brushless DC motors with 120° voltage source inverter [texte imprimé] / Qiang, Han, Auteur ; Samoylenko, N., Auteur ; Jatskevich, J., Auteur . - 2008 . - pp. 423 - 432. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°2 (Juin 2008) . - pp. 423 - 432 Mots-clés : Brushless  DC  motors;  commutation;  invertors;  nonlinear  equations;  permanent  magnet  machines;  stators;  switching  convertors;  synchronous  machines Résumé : This paper describes average-value modeling of brushless dc (BLDC) motor-inverter systems, which is challenging due to the complicated switching patterns of the stator currents. A new average-value model (AVM) that appropriately includes commutation and conduction subintervals of the BLDC motor with a 120deg inverter is presented. The proposed model is explicit and uses a proper qd model of the permanent magnet synchronous machine. The required commutation angle is represented as a nonlinear algebraic function, which is readily obtained from the detailed simulation. The studies conducted are based on two typical industrial motors with different electrical time constants, and include hardware measurements, detailed simulation, and comparison with a previously published AVM. The proposed model is shown to be more accurate in terms of both large and small-signal analysis and is applicable to both types of motors. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4505390&sortType%3Das [...]

Dynamic performance of brushless DC motors with unbalanced hall sensors / Samoylenko, N. in IEEE transactions on energy conversion, Vol. 23 n°3 (Septembre 2008) 

Public ISBD [article]  in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 752 - 763 Titre : Dynamic performance of brushless DC motors with unbalanced hall sensors Type de document : texte imprimé Auteurs : Samoylenko, N., Auteur ; Qiang, Han, Auteur ; Jatskevich, J., Auteur Année de publication : 2008 Article en page(s) : pp. 752 - 763 Note générale : Energy conversion Langues : Anglais (eng) Mots-clés : Hall  effect  transducers;  brushless  DC  motors;  torque Résumé : Brushless dc (BLDC) motors controlled by Hall-effect sensors are widely used in various applications and have been extensively researched in the literature, mainly under the assumption that the Hall sensors are ideally placed 120 electrical degrees apart. However, this assumption is not always valid; in fact, sensor placement may be significantly inaccurate, especially in medium- and low-precision BLDC machines. This paper shows that misplaced Hall sensors lead to unbalanced operation of the inverter and motor phases, which increases the low-frequency harmonics in torque ripple and degrades the overall drive performance. The paper also presents several average-filtering techniques that can be applied to the original Hall-sensor signals to mitigate the effect of unbalanced placement during steady-state and transient operations. The proposed methodology is demonstrated by modeling and hardware, and is shown to achieve dynamic performance similar to that of a BLDC motor with accurately positioned Hall sensors. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4537158&sortType%3Das [...] [article] Dynamic performance of brushless DC motors with unbalanced hall sensors [texte imprimé] / Samoylenko, N., Auteur ; Qiang, Han, Auteur ; Jatskevich, J., Auteur . - 2008 . - pp. 752 - 763. Energy conversion Langues : Anglais (eng) in IEEE transactions on energy conversion > Vol. 23 n°3 (Septembre 2008) . - pp. 752 - 763 Mots-clés : Hall  effect  transducers;  brushless  DC  motors;  torque Résumé : Brushless dc (BLDC) motors controlled by Hall-effect sensors are widely used in various applications and have been extensively researched in the literature, mainly under the assumption that the Hall sensors are ideally placed 120 electrical degrees apart. However, this assumption is not always valid; in fact, sensor placement may be significantly inaccurate, especially in medium- and low-precision BLDC machines. This paper shows that misplaced Hall sensors lead to unbalanced operation of the inverter and motor phases, which increases the low-frequency harmonics in torque ripple and degrades the overall drive performance. The paper also presents several average-filtering techniques that can be applied to the original Hall-sensor signals to mitigate the effect of unbalanced placement during steady-state and transient operations. The proposed methodology is demonstrated by modeling and hardware, and is shown to achieve dynamic performance similar to that of a BLDC motor with accurately positioned Hall sensors. En ligne : http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4537158&sortType%3Das [...]