Dynamic analysis and speed control of a polyphase switched reluctance motor
Mahmoud Ahmad Abdulatif;
Abstract
The switched reluctance motor (SRM) drive is nowadays one of the most considerable electric drive due to its good features that made it comparable with induction motor drive.
The dynamic response of a SRM can be carried out by using informations obtained from static measurements, giving the exciting coil flux linkages as a function of both the coil current and the angular position of the rotor.
The model used for dynamic analysis comprises the set of phase circuit and the mechanical differential equations. Then, a numerical integration of the nonlinear differential equations of the motor with magnetization data in the fonn of a look-up table
1.11(8,i) is carried out. The cubic spline interpolation is used to determine the intermediate values of the variable given by look up table, which gives more accurate representation than other methods.
The method is applied to compute the instantaneous values of current and torque for each phase, total torque and speed under different modes of operation; low speed with current control (chopper mode) and high speed with angle control (single pulse mode), and the required switching-on and off angles.
Also this work presents an efficient variable gain control scheduling for SRM. This control strategy introduces a variable gain structure to enhance the speed regulation of SRM in both starting and dynamic load excursion. The variable gain (VG) controller is driven by the speed error and has the nature of PI control action.
The dynamic response of a SRM can be carried out by using informations obtained from static measurements, giving the exciting coil flux linkages as a function of both the coil current and the angular position of the rotor.
The model used for dynamic analysis comprises the set of phase circuit and the mechanical differential equations. Then, a numerical integration of the nonlinear differential equations of the motor with magnetization data in the fonn of a look-up table
1.11(8,i) is carried out. The cubic spline interpolation is used to determine the intermediate values of the variable given by look up table, which gives more accurate representation than other methods.
The method is applied to compute the instantaneous values of current and torque for each phase, total torque and speed under different modes of operation; low speed with current control (chopper mode) and high speed with angle control (single pulse mode), and the required switching-on and off angles.
Also this work presents an efficient variable gain control scheduling for SRM. This control strategy introduces a variable gain structure to enhance the speed regulation of SRM in both starting and dynamic load excursion. The variable gain (VG) controller is driven by the speed error and has the nature of PI control action.
Other data
| Title | Dynamic analysis and speed control of a polyphase switched reluctance motor | Other Titles | التحليل الديناميكى والتحكم فى سرعة محرك معاوقة متعدد الأوجه ذو السرعات المتغيرة | Authors | Mahmoud Ahmad Abdulatif | Issue Date | 1997 |
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