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Article
Performance Improvement of a Single Phase Induction Motor Fed by Nonsinusoidal Voltages

Author: Jamal A. Mohammed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2008 Volume: 26 Issue: 7 Pages: 797-811
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The distorted voltage waveforms, which have, more or less, a high harmoniccontent, have negative impact on the long-term performance of the motor, as theycause nonsinusoidal currents in the stator and the rotor, and consequently additionallosses and distorted torque in the machine.The steady state performance of Permanent Capacitor single phase inductionmotor fed by optimal SHEPWM inverter is studied with respect to harmonics,additional losses and torque pulsations. The effectiveness of the optimal SHPWMtechnique in improving of motor performance is investigated analytically

تسب  ب موجات الفولتية المش  وهة والتي تمتلك محتوى" توافقيا" كبيرا" كان أم صغيرا" تأثيرا"سلبيا" على الأداء العمري للمحرك و تول  د تيارات غير جيبية في جزئي المحرك الساكن و الدواروبالتالي خسائر أضافية وعزم مش  وه في الماكنة.ت  م دراسة سلوك المحرك الحثي أحادي الطور ذو المتسعة الدائمية عند الحالة المستقرة وال  مغذىمن عاكس يعمل بتضمبن عرض النبضة بحذف التوافقيات الأنتقائي المثالي من حيث التوافقياتوالخسائر الأضافية والعزوم التنب  ضية. ت  م التحق ّ ق تحليليا" من فعالية التقنية المثالية لتضمبن عرضالنبضة بحذف التوافقيات الأنتقائي في تحسين أداء المحرك.


Article
Effect of Non-Linear Load Harmonics on Single phase Transformer Losses and Design Active Filter

Author: Zainab Nadhem Abbas Al-Mousaoy
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 11 Pages: 2143-2155
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

As a result of the negative effects unshaped on some of the components in power systems such as the transformers, a great concern was shown to treatment this phenomenon so we rise in this search by designing a suitable active filter with two strategies for harmonic repression. To analysis and treatment this case, using a singlephase transformer with full-bridge rectifier, and a resistant load to generate some oftotal harmonic current and voltage distortions (THDi and THDv). Finally, simulation results with psim software show that the designed active filter with two strategies is very effective in harmonic elimination and power factor correction of the single phase transformer.

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