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Bu çalışmada, yüzey yerleştirmeli kalıcı mıknatıslı senkron generatörde meydana gelen tutma torkunu azaltmak için stator nüvesinde gerçekleştirilen yapısal değişiklikler sunulmaktadır. Bu yapısal değişikliklerin tutma torku ve generatör performansı üzerine etkisi araştırılmış, 2B-3B sonlu elemanlar analiz (SEA) ve analitik sonuçları karşılaştırmalı olarak verilmiştir. Tutma torkunun hesaplanması için gerekli olan hava aralığı akı yoğunluğunun elde edilmesinde manyetik eşdeğer devre ve bağıl geçirgenlik modeli kullanılmıştır. Hava aralığı ve mıknatıs bölgelerindeki manyetik alan öncelikle oluk etkisiz olarak hesaplanmış, daha sonra uygun bir şekilde olukların dâhil edilmesiyle elde edilen bir bağıl geçirgenlik fonksiyonu (düzeltme faktörü) dikkate alınarak tekrar ifade edilmiştir. Önerilen yapısal değişikliği ve analitik yöntemi uygulamak için, 4-kW, 24-kutuplu ve 72 oluklu radyal akılı makine tasarlanmış ve optimize edilmiştir.

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This paper introduces the detailed coupled field-circuit analysis including performance characteristics of a 4-kW in-running rotor permanent magnet synchronous generator (PMSG) used in rural-type small-scale wind turbines for water heating purpose. The content of the work consists of design, analysis, optimization, production and testing processes and validation studies. An integrated 2D electromagnetic field and circuit model are used in the design and analysis processes. The electrical machine design involves complex and time-consuming processes. This model provides comprehensive information on machine behavior under different conditions and is an effective to demonstrate compliance with real load conditions prior to the manufacture. The goal of the optimization process is to find a design that offers cost, manufacturability and efficiency as well as generator output values. For this, a multiobjective optimization approach has been used. Typical design and simulation principles are applied to the designed PMSG, respectively, including calculation and evaluation of various output parameters for different simulated wind speed rates and varying load conditions. Furthermore, the analytical studies related to finite element methods and parametric approaches are presented in collaboration with experimental studies carried out for different load rates.

Parallel to the scientific and technological development, control over hardware used in industry and in daily life is being realized by using remote-controlled systems. Internet, mobile communications, and infrared and wireless control systems are often preferred. The control of a direct-current motor (DCM), which has become a part of our daily life, is achieved using a Pocket PC and General Packet Radio Service (GPRS). An Internet-based human–machine interface constitutes an embedded Visual Studio, which includes Windows CE 5.0 software and Smartphone and Pocket PC applications. An application server protocol is created using basic principles of GPRS control or communication system control. Client software is developed, real-time torque, speed, power, and current of a DCM are monitored, and motor speed control is performed using a monitoring system written in the C# language without using any additional equipment. The proposed system offers the possibility of real-time monitoring in a cost-effective manner.