Harsh environment with very low harmonics distortion

مقدم أطروحة جامعية

Hamad, Karim A.

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكهربائية

دولة الجامعة

العراق

الدرجة العلمية

دكتوراه

تاريخ الدرجة العلمية

2004

الملخص الإنجليزي

The design and implementation of a new speed control system for three - phase squirrel - cage induction motor are presented in this research.

The system uses a microcontroller for inverter control, and this : speed controller is designed by employing an IGBT- type power electronic switch.

The IGBTs are controlled by pulses based on sinusoidal pulse width modulation (SPWM) technique which satisfies the main requirement of wide range, variable-speed control at which the magnitude and frequency of the control voltage applied to the stator windings, be dependency variable.

This allows the torque-speed characteristics of the induction motor to match most required characteristics.

The PWM are generated by comparing a reference sine wave with carrier triangular wave.

The first wave is obtained from an output filter, designed to convert a square wave reference signal into sine wave signal.

The square wave reference signal is obtained from the microcontroller through specially designed program ; this program also checks the system state initially then generates three phase reference waves possessing frequency control ability.

Additional designed circuits are to assist this control operation in second wave is obtained by an external oscillator with a frequency of 13.2KH2, the high range of carrier frequency is used to eliminate low order harmonics, torque pulsation.

And ensure reliable control operation.

التخصصات الرئيسية

الهندسة الكهربائية

الموضوعات

• الحوسبة

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-305839