Comparisons of Cuk, SEPIC and Zeta converter performance for harmonics mitigation and PFC in BLDC speed control

Abstract

Brushless dc motor (BLDC) is type of dc motor that efficiently use for electric appliances compared with another types of electric motor. BLDC is used in many applications, such as household applications, transportations, aerospace, heating, ventilating, robotics, and many others. BLDC is typically configurated with ac source, DBR (Diode Bridge Rectifier) and connecting capacitor. Because of BLDC needs square waveform current to work therefore, it is necessary to use inverter to convert the dc current to modified ac current. In this case, inverter also required to control the speed of BLDC. Usually, conventional speed control methods which only use DBR and inverter resulting high amount of harmonics and reducing the power factor at the ac input. To overcome this problem in this paper describes several methods that are already designed and examined speed control for BLDC to realize the idea of this research three types of converters, Cuk, SEPIC, and Zeta are utilized to be used for harmonics mitigation and power factor correction (PFC) in BLDC speed control application.