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Design of DC Power Supply and Power Management
Published in Nihal Kularatna, Electronic Circuit Design, 2017
Nonisolated basic converters (buck, boost, and buck-boost types) are generally used for lower-power PCB-level converter circuits and are not so popular for higher-power applications. Isolated versions such as forward mode, flyback, and bridge types are generally used for applications where higher power, galvanic isolation, and multiple output rails are required. Because of the advantages of operation in buck or boost modes without inversion, SEPIC converters are gaining popularity in battery-powered applications. The following sections provide an overview of important design aspects of these topologies.
Front-End Power Converter Topologies for Plug-In Electric Vehicles
Published in Md. Rabiul Islam, Md. Rakibuzzaman Shah, Mohd Hasan Ali, Emerging Power Converters for Renewable Energy and Electric Vehicles, 2021
Chandra Sekar S., Asheesh K. Singh, Sri Niwas Singh, Vassilios G. Agelidis
A single-ended primary inductor converter (SEPIC) circuit is shown in Figure 5.4 with class E resonant converter for light-emitting diode (LED) drivers [5]. SEPIC converter consists of two inductors, two capacitors, three diodes, and one switch. The working mode of SEPIC converter consists of discontinuous conduction mode (DCM) and the class E resonant DC–DC converter made by chock inductance, and the switch is common to both circuits. The class E converter aims to reduce the DC voltage and is given to the LED driver.
Classical DC/DC Converters
Published in Fang Lin Luo, Hong Ye, Renewable Energy Systems, 2013
The single-ended primary inductance converter (SEPIC) is derived from the boost converter. Its circuit diagram is shown in Figure 8.33. It was created after Cúk converter and the so-called positive output Cuk converter.
SEPIC-Based DC–DC Converter with Soft Switching Operation for Wide Conversion Operation of E-Automobiles
Published in Electric Power Components and Systems, 2023
Raja Elangovan, Karpagam Nagarajan
A SEPIC converter is a type of DC-to-DC converter that uses duty ratio to transform a constant DC input voltage into an adjustable DC output voltage, which can be varied within a specific range. The SEPIC converter is expanded and is termed as single-ended primary-inductance converter. It is capable of providing a positive output voltage that are regulated from the input voltage which, thus, varies above or below the vout (output voltage). The basic diagram of SEPIC converter is shown in Figure 3 which comprises of an output capacitor (COUT), coupling capacitor (CP), a MOSFET(Q1), coupled inductors (L1a and L1b), diode (D1), and input capacitor(CIN). The two operation modes of the SEPIC converter are represented in Figure 4(a) which depicts the “ON” state and Figure 4(b) depicts the “OFF” state.
An optimized design modelling of PV integrated SEPIC-based four-switch inverter for sensorless PMBLDC motor control
Published in Automatika, 2022
Poovizhi Mani, Senthil Kumaran Mahadevan, Anitha Roseline Johnson, Murugesan Kullan
The analysis of sensorless speed control in four-switch BLDC motor drive fed by PV system is done in this paper. The output potential of single-ended primary inductor converter is retained by means of Fuzzy Logic MPPT algorithm. By using SEPIC converter, the ripples are greatly minimized. The efficiency of SEPIC converter is observed as 96%, from the simulations. SEPIC converter exhibits a high voltage gain of 1:8. The reliability of the proposed strategy is evaluated under no load condition, running condition and dynamic load condition of brushless DC motor. The effectiveness of the proposed strategy is analysed through simulation and real-time tactics. The behaviour of the system is analysed in the absence of sensors, which is cost effective. The cost and size are minimized by the use of four-switch VSI strategy. An effective speed control is achieved by PI controller, which is tuned by using the GWO algorithm even under full load condition. A detailed analysis of proposed strategy and existing strategy is compared and simulation results are validated.
PI-like fuzzy based synchronous SEPIC converter control for PV-fed small scale irrigation DC pump
Published in Cogent Engineering, 2021
Tewodros Gera Workineh, Biniyam Zemene Taye, Abraham Hizikiel Nebey, Elias Mandefro Getie
Various types of DC/DC converters, such as buck, boost, and buck-boost converters, are used to ensure impedance adaption between the solar PV generation and the load. A single-ended primary inductor converter (SEPIC) is another DC/DC converter designed to overcome the drawback of the above converters. It is positively regulated, has wide operation ranges and has better efficiency (Khather & Ibrahim, 2020; Vaigundamoorthi et al., 2020). Moreover, synchronous SEPIC converters are DC-DC converter that can maintain a constant output voltage under varying input conditions such as voltage reduction as hard shade is applied and load condition. Solar radiation and ambient temperature are factors that affect the efficiency of PV-powered pumping systems. The DC power required to fuel the DC water pump generated by the PV module is linearly dependent on the radiation (Tiwari & Kalamkar, 2018).