Variable Frequency Control in High Switching Frequencies DC-DC Converters
Syahir Syafiq1, Tze-Zhang Ang1* and Mohamed Salem1
1School of Electrical and Electronic Engineering, Universiti Sains Malaysia (USM), Nibong Tebal, 14300, Penang, Malaysia; *Correspondence: firstname.lastname@example.org;
Received: 12/1/2022, First revision: 1/2/2022, Accepted: 15/3/2022, Published: 28/3/2022
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The switching mode DC- DC was extensively researched and developed to meet most industrial power electronics requirements. Using the switch mode has the advantage of reducing conductive and switching losses by increasing the switching frequency. In addition, the power converters structure includes energy storage components, and power switches that reduce their performance. The development of new typologies for the power converters was undertaken in parallel with the advancement of instruments, materials, and control systems technology. By minimizing the switching losses and the overall converter size, these typologies may provide high performance. This study will therefore reflect on the classifications of DC- DC converters, and their ability to operate at high switching frequencies. Also, the control methods of the DC- DC converters will be discussed and compared. This project includes an intensive comparison between different typologies of DC-DC converters by using Matlab/ Simulink software to implement the frequency controlfor the most two effective typologies.
Low-power portable battery-operated devices, such as cellphones, laptops, PDAs, etc., have become increasingly popular . Growing system requires multiple digital processors in which the power management unit plays a key role in efficient DC power processing to extend the battery life. It consists primarily of one or more DC- DC converters with the objective to control output voltage under varying input voltage and load current conditions, and to achieve high efficiency with rapid transient results. The relentlessness of high power density motivates efforts to increase the switching frequency to multi-megahertz in order to significantly reduce passive elements such as magnetics and capacitors . Resonant converters have been thoroughly researched in order to minimize switching losses at such a high switching frequency, among which the Class E DC– DC converter, featuring simple topology and fast zero-voltage switching (ZVS) for the power switch, has attracted considerable attention in recent year [3-5].
Figure 1 shows a Class E DC- DC converter main circuit consist of a Class E inverter and a network rectifier. The inverter of Class E converts the DC input voltage to the AC voltage
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