A. Bharathi Sankar ¹, R. Seyezhai ¹

Affiliations
1 Department of Electrical & Electronics Engineering, SSN college of Engineering Chennai, Tamilnadu, IN

Abstract

Multilevel inverters have been popularly used for high power applications. These inverters are preferred for BLDC drive compared to conventional inverters as they reduce the stress across the switches and the spectral quality of the output is improved. This paper presents the implementation of a novel three-phase Active Neutral Point Clamped Multilevel Inverter (ANPCMLI) fed brushless DC motor. The main advantage of BLDC is the presence of electronic commutator. The electronic commutation instants are determined by rotor position which is either by position sensors or by sensorless techniques. In this paper, the commutation logic is implemented using FPGA and it receives hall sensor output from BLDC motor (1kW) and generates the gate pulses which drive the IGBT switches of the proposed multilevel inverter. A model of the ANPCMLI with BLDC drive is simulated in MATLAB and the sensored control is implemented on a FPGA platform. A prototype of three-phase MLI feeding BLDC drive is developed and the simulation results are verified. The performance of proposed inverter is compared with conventional voltage source inverter for BLDC drive. It is found that the torque ripple and harmonics are reduced with the proposed inverter structure.

Keywords

Active Neutral Point Clamped Multilevel Inverter, Brushless DC Motor, Field Programmable Gate Array.

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P. Priya ¹, G. Shabbeer Basha ¹, S. V. Sujith Niranjan ¹, R. Seyezhai ¹

Affiliations
1 SSN College of Engineering, Kalavakkam – 603110, Tamil Nadu, IN

Abstract

Objectives: To design and analyze a high gain converter namely Quadratic Boost Converter which acts as an interface with the solar Photovoltaic power generation. Methods: The design and testing of the Quadratic Boost Converter is done using MATLAB and SIMULINK. The performance parameters such as voltage gain, output voltage ripple and stress across the switches are computed. The losses in the converter are calculated and listed. The hardware prototype for the converter is developed to highlight the important features of the converter. Findings: Currently, solar Photovoltaic generation plays an important role to satisfy the energy demand and it provides numerous benefits such as it operates without pollution, no fuel is required and basically a clean energy source without polluting the environment. Application: A single PV cell produces a low output voltage and therefore a suitable interface circuit is required for DC applications. The Quadratic Boost Converter is best suited because of its high gain, reduced voltage and current stress with high efficiency without increasing the number of active switches compared to the conventional boost converter. Also the limitation of switching frequency and voltage gain is overcome in this proposed topology.

Keywords

Efficiency, Losses, Photovoltaic, Quadratic Boost Converter, Ripples

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