Estimating Electrical Parameters of the Induction Motor by Measuring the Components Temperatures

Abstract

In this article the electrical parameters of the induction motor are estimated by measuring temperature of its components. This process consists of four sections: 1-Thermal resistance model 2- Electrical parameters 3- Electrical model and 4- Neural network which presents motor parameters and operational status compatible with corresponding learning data. In thermal resistance model, we use physical and geometrical properties of motor components to formulate thermal resistance of each component of the motor. In electrical model, electrical losses are calculated by electrical variables ,by relationship between electrical losses and thermal resistance ,these modeles gives us corresponding temperatures as output. These temperatures were used for training network (temperatures as input data, stator current and maximum torque as target data) in the neural network. After measuring temperatures of the components and using them as inputs to neural network, the corresponding stator current and maximum torque (target data) are estimated. All the stator currents referred to this paper were validated by experimental measurements.تÙدÛر اÙÙعÙÙات اÙÚ©ÙربائÛØ© اÙÙحرک اÙتعرÛÙÛ ÙÙ Ø®Ùا٠ÙÛاس درجات اÙحرارة ÙÚ©ÙÙاتÙÛ Ùذ٠اÙÙÙاÙØ© تÙدر اÙÙعÙÙات اÙÚ©ÙربائÛØ© Ù٠اÙÙحرک اÙتعرÛÙÛ ÙÙ Ø®Ùا٠ÙÛاس درجة حرارة ÙÚ©ÙÙاتÙ. ÙتتکÙÙ Ùذ٠اÙعÙÙÛØ© Ù٠أربعة Ø£ÙساÙ: ÙÙÙذج اÙÙÙاÙÙØ© 1-اÙØ­Ø±Ø§Ø±Û 2- اÙÚ©ÙربائÛØ© اÙÙعÙÙات 3- اÙÚ©ÙربائÛØ© ÙÙÙذج Ù4- اÙشبکة اÙعصبÛØ© اÙØªÛ ØªØ¹Ø±Ø¶ اÙÙعÙÙات اÙحرکÛØ© ÙاÙÙضع اÙتشغÛÙÛ ÙتÙاÙÙØ© Ùع اÙبÛاÙات اÙتعÙ٠اÙÙÙابÙØ©. ÙÛ ÙÙÙذج اÙÙÙاÙÙØ© اÙحرارÛØ©Ø ÙÙØ­Ù Ùستخد٠اÙخصائص اÙÙÛزÛائÛØ© ÙاÙÙÙدسÛØ© ÙÙÙÚ©ÙÙات اÙسÛارات ÙصÛاغة اÙÙÙاÙÙØ© اÙحرارÛØ© ÙÙ Ú©Ù ÙÚ©ÙÙ ÙÙ ÙÚ©ÙÙات اÙسÛارات. ÙÛ ÙÙÙذج اÙÚ©ÙربائÛØ©Ø Ùتحسب خسائر اÙÚ©ÙربائÛØ© ع٠طرÛ٠اÙÙتغÛرات اÙÚ©ÙربائÛØ©Ø ÙØ°ÙÚ© اÙعÙاÙØ© بÛ٠خسائر اÙÚ©ÙربائÛØ© ÙاÙÙÙاÙÙØ© اÙحرارÛØ©Ø ÙØ°Ù MODELES ÛعطÛÙا اÙÙÙابÙØ© درجات اÙحرارة کإخراج. ÙاستخدÙت Ùذ٠درجات اÙحرارة Ùشبکة اÙتدرÛب (درجات اÙحرارة Ùإدخا٠اÙبÛاÙØ§ØªØ Ø§ÙÙÙاÙÛ Ø§ÙحاÙÛØ© ÙØ£Ùص٠عز٠دÙرا٠ع٠بÛاÙات اÙÙدÙ) ÙÛ Ø§Ùشبکة اÙعصبÛØ©. بعد ÙÛاس درجة حرارة اÙÙÚ©ÙÙات ÙاستخداÙÙا Ú©ÙدخÙات ÙÛ Ø§Ùشبکة اÙعصبÛØ©Ø ÙÛÙدر اÙجزء اÙثابت اÙحاÙÛØ© اÙÙÙابÙØ© ÙØ£Ùص٠عز٠دÙرا٠(اÙبÛاÙات اÙÙدÙ). ت٠اÙتحÙÙ Ù٠کاÙØ© اÙتÛارات اÙثابت اÙÙشار Ø¥ÙÛÙا Ùذ٠اÙÙرÙØ© اÙÙÛاسات اÙتجرÛبÛØ©.