International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 07 | July-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 546 Zeta Converter Fed BLDC Motor Drive for Enhancement of Power Quality Nagesh Kinagi 1 , Mahadevi Biradar 2 , Dr.M.S.Aspalli 3 1 PG Scholar, PDA College of Engineering, Kalaburagi, Karnataka 2 Professor, PDA College of Engineering, Kalaburagi, Karnataka 3 PG Co ordinator, PDA College of Engineering, Kalaburagi, Karnataka ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - This paper presents a brushless dc (BLDC) motor drive with power factor correction (PFC) and improvement of power quality for low-power applications. Speed of the BLDC motor is controlled by adjusting the DC link voltage of the VSI. This facilitates the operation of VSI at fundamental frequency switching by using the electronic commutation of the BLDC motor which offers reduced switching losses. A Power Factor Correction buck–boost converter i.e, zeta converter is designed to operate in discontinuous current mode (DICM) to provide an inherent PFC at ac mains. The performance of the proposed drive is evaluated over a wide range of speed control and varying supply voltages with improved power quality at ac mains. The proposed strategies have been verified with the help of MATLAB/SIMULINK. Keywords: BLDC motor, Zeta Converter, Power Factor Correction, Speed Control, Power Quality. 1. INTRODUCTION There are many techniques to improve the power quality in BLDC Motor and power factor correction at AC mains. The previous system are SEPIC (single ended primary inductance converter) and Buck-Boost converter are used separately for improving the power quality of the BLDC Motor and power factor correction. In this system, zeta converter controls the two parameters using the single converter. The BLDC Motor is most suitable for low power applications and we can also achieve the speed control of the BLDC Motor. There are no sensors are used to control the speed. Zeta converter uses single switch and it provides overload and short circuit protections. Using a single switch in the converter, decreases the complexity of the converter operation. The zeta converter belongs to fourth order converters that can step up or step down the input voltage when the zeta converter is supplied by AC source that is act as a resistive load, so it is called as resistance emulators. Selection of BLDC Motor over the Brushed DC Motor and induction motors  Higher efficiency and reliability  Less noise  Better speed-torque characteristics and wide speed range  Works better for low power applications  No brush friction and EMI problem The main aim of this paper is to improve the power quality and power factor at the AC mains and using the DC link voltage, the control of the BLDC Motor must be achieved. 2. ZETA CONVERTER The Zeta converter has the capability of getting low or high voltage of output referred to the input value. This converter offers high efficiency compared to the SEPIC Converter and synchronous rectification can be easily implemented in this converter. Fig -1: Circuit diagram of Zeta Converter.