Page 1 Three-Phase Three-Switch Two-Level Unidirectional PWM Rectifier Using Artificial Neural Networks B. Umamaheshwari Department of Electronics and Electrical Engineering, Avanthi institute of Engineering and Technology Visakhapatnam, Andhra Pradesh - 535006, India. D. Dhana Prasad Department of Electronics and Electrical Engineering, Avanthi institute of Engineering and Technology Visakhapatnam, Andhra Pradesh - 535006, India. Abstract: This work presents a methodology to apply space vector modulation to a three-phase three-switch two- level Y-connected unidirectional pulse width modulation (PWM) rectifier. Converter switching stages are analyzed to determine switch control signals for space vector modulation. A switching sequence is proposed in order to minimize the number of switch commutations and to reduce the switching losses. PWM rectifiers have been implemented in many applications like vector controlled drives for control of induction motors, traction, interface for renewable energy sources etc., PWM rectifiers are also used in distributed power generation applications such as micro turbines, fuel cells and wind mills. Conventional PWM converters are used for wind turbines that have a permanent Magnet alternator. The three phase current controlled voltage source boost type PWM rectifier is commonly used due to following advantages. Low total harmonic distortion of the input current, Regulation of output DC voltage, Bidirectional power flow. The major advantages of using the pulse width modulation technique is the reduction of higher order harmonic. It also makes it possible to control the magnitude of the output voltage and improve the power factor by forcing the switches to follow the input voltage waveform. Artificial neural networks is used for pulse width control. Index Terms: Rectifier, ANN, PWM INTRODUCTION: When bidirectional power flux is not necessary, high power factor unidirectional rectifiers present some advantages as the decrease of the number of power switches, natural protection of short-through and smaller processing of energy for the active switches. If output voltage is not so high, two-level topologies become attractive because they do not need to control midpoint voltage of the dc bus, reducing the number of sensors and controllers In this work, space vector modulation will be applied to a three-phase three- switch two-level Y-connected unidirectional pulse width modulation (PWM) rectifier in order to minimize the number of switch commutations as well as reduce converter losses. This structure presents as main drawback a high number of semiconductors when compared with other topologies. Other characteristics of this topology are presented in further chapters [1]. The proposed application methodology of this modulation technique is based on sub-sectors definition, on rectifier operation stages analysis and on duty cycles determination. Therefore, it is not necessary to identify the present vector sector, just impose adequate current sector in phase with line voltages. Chapter 2 presents the main characteristics of a two-level unidirectional PWM rectifier and in Chapter 3 the basic steps are described in order to apply space vector modulation to this converter. Vector control concepts used with the proposed modulation techniques are shown in Chapter 5. Chapter 9 conclusions and analysis results are discussed [2]. Cite this article as: B. Umamaheshwari & D. Dhana Prasad, "Three-Phase Three-Switch Two-Level Unidirectional PWM Rectifier Using Artificial Neural Networks", International Journal & Magazine of Engineering, Technology, Management and Research, Volume 5, Issue 5, 2018, Page 1-5.