Yazar "Yanmaz, Hilmi" seçeneğine göre listele

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    AC chopper application and benefits of auxiliary windings for PSC motors
    (2013) Işık, Mehmet Fatih; Güvenç, Uğur; Yanmaz, Hilmi
    In this work, a novel driver circuit is designed for permanent split capacitor motors (PSC). With this driver circuit, semi-conductive technology is used in place of cumulative winding for this type of motors that are particularly used in kitchen exhaust fans. Developed circuit is controlled via PWM method. IGBT transistors are used for the power circuit. An optocoupler driver is designed and used in order to drive and trigger these IGBT transistors. Due to this reason, this work includes an electronic AC/AC chopper application that provides energy conservation and noise reduction by removing cumulative winding in currently used asynchronous motors with cumulative auxiliary winding stators and shaded pole motors.
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    Öğe
    Design and Implementation of a Closed Loop Electronic Driver Circuit for the Air Curtains Used in Aspirators
    (Natl Inst Science Communication-Niscair, 2017) Işık, Mehmet Fatih; Haboğlu, Mustafa Reşit; Yanmaz, Hilmi
    Although their low efficiency values, permanent split capacitor (PSC) motors are preferred especially for the aspirators used in household applications for their low cost and high durability. Those motors are the main components that provide the working of the air curtains. One of the most important characteristics of air curtains is that they work discretely with work levels. As the level is increased, noise level also increases along with energy consumption and heat. That undesired situation causes efficiency problems for energy consumption. Additionally, high noise values are disturbing for the house residents. The speed of the conventional PSC motors are adjusted in stages which allows to set only discrete speed values. In this study, a new electronic driver circuit that eliminates the discrete speed adjustment and allows to set a speed value in the interval of the PSC stages is designed for the devices that provide the air flow in aspirators. An automatic feedback system is developed in order to control the motor speed. For that feedback mechanism, a novel air flow sensor is designed. In addition, a fault detection and warning system is developed for possible errors. As a result of the experiments, the developed driver circuit and feedback system shows less heat and noise values along with higher energy efficiency.
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    Öğe
    Monitoring and control of PLC based motion control systems via device-net
    (Institute of Electrical and Electronics Engineers Inc., 2014) Işık, Mehmet Fatih; Haboğlu, Mustafa Reşit; Yanmaz, Hilmi
    The control of mechanical systems are generally applied by using electric motors which are useful for the control of velocity, position and torque. On the other hand, servo motors are preferred due to their characteristic properties for the systems that require more accurate operations. In this study, a mechanical prototype having a two degree of freedom motion capacity integrated with AC servo motors is generated. The control of those AC servo motors is achieved by using an Omron PLC (Programmable Logic Controller). A SCADA program is developed for user control and monitoring. The connection between SCADA and PLC is obtained by using Device-Net web protocol. The velocity and position of the motion control system are monitored with real time animation on the screen. It is observed after the testing of the designed system that the position and velocity values are convenient. © 2014 IEEE.
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    Öğe
    Termoelektrik yarıiletkenlerin P-N elektriksel iletkenlik tipinin belirlenmesine yönelik çok fonksiyonlu prob tasarımı
    (2019) Dişlitaş, Serkan; Yanmaz, Hilmi; Ömer, Günay; Ahıska, Raşit
    Bu çalışmada, termoelektrik (TE) yarıiletkenlerin P-N elektriksel iletkenlik tiplerinin belirlenmesi amacıyla, temelini Seebeck etkisine dayanan Hot-Probe metodunun oluşturduğu çok fonksiyonlu bir prob tasarlanmış ve gerçekleştirilmiştir. Tip belirleme işlemi, TE yarıiletkenin yüzeyleri arasında sıcaklık farkının (?T) oluşturulmasıyla üretilen Seebeck geriliminin (termoemk) pozitif veya negatif genlikli olma durumuna göre yapılmaktadır. Geliştirilen prob sayesinde, hem sıcaklık farkının oluşturulmasına yönelik gerekli ısıtma hem de termoemk gerilimi ve sıcaklık ölçümü yapılabilmektedir. Deneysel çalışma sonuçlarına göre; geliştirilen prob ile termoemk ölçümlerinin 0-30 mV aralığında ± 0.1 mV doğrulukta, sıcaklık ölçümlerinin ise 0-75 ?C aralığında ± 1 ?C doğrulukta yapılabildiği anlaşılmıştır. Sonuç olarak, geliştirilen çok fonksiyonlu prob ile TE yarıiletkenlerin elektriksel iletkenlik tipleri P veya N olarak pratik, hızlı ve güvenilir bir şekilde belirlenebilmektedir.