Elektronik ve Haberleşme Mühendisliği Bölümü

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/179

Browse

Browsing Elektronik ve Haberleşme Mühendisliği Bölümü by Subject "AC Motor"

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • Item
    Citation Count: SOODİ, H.A. (2014). Design of a photovoltaic power converter for driving and controlling ac motors. Yayımlanmamış yüksek lisans tezi. Ankara: Çankaya Üniversitesi Fen Bilimleri Enstitüsü.
    Design of a photovoltaic power converter for driving and controlling ac motors
    (2014-10-20) Soodi, Hamed Atyia; Çankaya Üniversitesi, Fen Bilimleri Enstitüsü, Elektronik ve Haberleşme Mühendisliği Bölümü
    The availability of renewable energy sources is of increasing importance on the market. In order to use renewable energy efficiently, suitable power processing equipment is needed to support different applications such as energy storage, feeding energy to the grid or driving AC motors. The subject of this thesis is the power processing for the speed control of AC motors, whereby photovoltaic (PV) modules are considered as the renewable energy source. In the classical design, this task is performed in two stages. First, the low DC voltage provided by the PV module is boosted to a higher voltage level that is suitable for driving the AC motor using a DC-DC converter. Second, the resulting DC link voltage is converted to a 3- phase AC voltage that is used for driving the AC motor by the help of a voltage source inverter (VSI). The frequency of this AC can be changed in order to change the motor speed. In contrast, this thesis proposes to employ a Z-source inverter (ZSI) as an AC motor drive. The ZSI combines the DC voltage boost and the AC voltage generation in a single stage by using a special capacitor/inductor network. The thesis first provides the model of the ZSI and discusses the working principle of voltage boost. Then, the generation of a variable frequency AC voltage based on the spacevector the pulse width modulation is elaborated. Together, a complete design of a VSI for driving AC motors is obtained. The suitability of the design is evaluated by a simulation study in Matlab/Simulink. It shows that the designed VSI can be optimized for AC motors with different characteristics. In addition, it is verified that the same VSI can be used for different AC motors by simply adjusting the voltage boost, that is, without changing any hardware components