The SiC-based remoted DC-DC converter design with 30 kW output is optimised for EV chargers and high-power functions. Study extra!
A SiC-based polymorphic DC-DC converter is an influence conversion system utilized in high-power functions the place effectivity, compactness, and reliability are necessary. These converters use SiC semiconductors to deal with larger voltage ranges, function at larger frequencies, and cut back energy losses in comparison with conventional silicon-based techniques. The polymorphic design permits for versatile voltage conversion in numerous settings, resembling electrical autos, renewable vitality techniques, and industrial automation. The analysis board from Microchip is designed to exhibit the efficiency of a SiC-based remoted DC-DC converter, showcasing the capabilities of SiC MOSFETs and diodes.
The remoted DC-DC converter design is tailor-made for Hybrid Electrical Automobile (HEV) and Electrical Automobile (EV) chargers, together with high-power switch-mode energy provide functions. By incorporating 1200V SiC MOSFETs and SiC Schottky Barrier Diodes (SBDs), the reference design achieves a 98.5% effectivity and an influence density of seven.2 kW/L at 30 kW output energy. Utilizing this reference design, design engineers can consider the efficiency of SiC MOSFETs and diodes in high-power DC-DC conversion techniques, gaining insights into their effectivity, voltage dealing with, and switching capabilities.
Excessive-voltage direct present (HVDC) functions, resembling exterior quick DC chargers, industrial energy techniques, knowledge centre and telecommunications energy, and battery backup techniques, profit from the converter’s means to effectively and reliably transmit energy over lengthy distances in high-demand environments. The design is optimised explicitly for 30 kW functions, utilizing an isolation asymmetrical twin full-bridge topology. This PSFB DC-DC converter topology is well-suited for 400V EV techniques and high-voltage energy sources. The SiC-based DC-DC converter, with its remoted energy configuration, additionally includes a PCB structure designed for security, present and mechanical stress, and noise immunity.Â
On the first facet of the converter, two constant-frequency full-bridge sections are carried out, known as the main and lagging H-bridges. Relying on the enter and output working situations, every H-bridge can operate as a full-bridge or half-bridge. The extra H-bridge configuration allows the converter to function as a full-bridge with a part shift between the main and lagging H-bridges or as two half-bridge controllers with a part shift between them. Moreover, the design permits part shifting inside a single H-bridge configuration. This topology helps a large 4:1 output voltage vary and maintains Zero Voltage Switching (ZVS) all through all working situations, guaranteeing excessive effectivity.
The converter could be managed equally to a buck converter utilizing a carrier-based modulation methodology. The system senses output voltage and present, that are enter right into a Proportional Integral (PI) controller to control the output energy. The converter helps two operational modes: Fixed Voltage and Fixed Present, each of which could be simply configured utilizing the management software program, offering flexibility for numerous functions.
Microchip has examined this reference design. With the included invoice of supplies (BOM), schematics, meeting drawings, and PCB layouts, engineers can rapidly prototype and check their designs, accelerating the event course of for high-efficiency energy conversion functions. The corporate’s web site has extra knowledge in regards to the reference design. To learn extra about this reference design, click on right here.
