Improved source-end current Power Quality performance of a BLDC motor drive using a novel DC-DC converter

This paper presents a brushless DC (BLDC) motor drive with power factor correction (PFC) for low power and high speed applications. In this study, the speed of the BLDC motor is controlled by adjusting the DC link voltage of the voltage source inverter (VSI). A novel PFC based Non-isolated Zeta Fly-back converter operating in discontinuous conduction mode (DCM) is used for controlling the DC link voltage of the VSI by exploiting single voltage sensor. Utilizing the zeta converter and its valuable property in reducing output current ripple and its inherently power factor correction capability and interleaving fly-back converter to zeta and using its high gain property, this converter can be a good choice for interfacing BLDC motors drive. The MATLAB/ SIMULINK environment is used to simulate the proposed model to achieve a wide range of speed control with near unity power factor at AC mains and improved PQ (Power Quality) based on IEC 61000-3-2 standard.