The 60 kW 3-phase interleaved LLC DC-DC converter doubles energy output, optimizing operations in demanding functions like EV charging.
LLC DC-DC converters are key parts in digital techniques. These converters use resonant strategies to attenuate vitality loss throughout energy conversion, enhancing effectivity and lowering warmth technology. With options like dealing with vast enter voltage ranges, adjusting the output voltage, and lowering electromagnetic interference, LLC converters are appropriate for environments from client electronics to industrial and automotive techniques. The 60 kW 3-phase interleaved LLC DC-DC converter reference design from Wolfspeed, CRD-60DD12N-Okay, advances past the earlier 30 kW mannequin, doubling its energy output for functions that demand excessive energy density and effectivity.
Purposes of the design embody EV quick charging stations, high-voltage direct present (HVDC) techniques, enterprise servers and telecommunications infrastructure, and industrial energy provides. The design incorporates 1200 V C3M Silicon Carbide MOSFETs and 650 V C6D Silicon Carbide Schottky diodes, optimizing it for operation. The converter makes use of a 3-phase interleaved LLC topology, which minimizes enter present ripple and maximizes effectivity, making it appropriate for high-power EV charging stations. Utilizing two discrete energy units, the converter reaches energy ranges historically achieved solely with bigger energy modules, offering an environment friendly, compact resolution.
To help numerous ranges of EV charging, the converter provides an output voltage vary from 200 V to 1000 V, reaching an influence density of 4.83 kW/L and sustaining greater than 98.5% peak effectivity. Its adaptive management system operates inside a switching frequency vary of 120 to 250 kHz, making certain optimum efficiency beneath all situations. Moreover, the enter voltage is managed between 650V and 900V by an active-front-end AC-DC converter, and the secondary aspect will be manually configured for sequence or parallel operation relying on the output voltage required.
The design achieves peak efficiencies over 98.5% and maintains an influence density of 4.83 kW/L. This reference design is a package deal that can be utilized as a place to begin for brand new Silicon Carbide (SiC) primarily based designs, facilitating integration into current techniques and offering a framework for energy expertise growth.
The design permits each parallel and sequence output settings for configurations. In a parallel output configuration, it could possibly ship an output voltage starting from 200 V to 250 V DC at a most of 133 A and from 250 V to 500 V DC at a most of 200 A, capped at 60 kW. In a sequence output configuration, the converter supplies an output voltage from 500 V to 1000 V DC at a most of 100 A, additionally capped at 60 kW.
The converter operates at a switching frequency between 120 and 250 kHz and makes use of pressured air cooling for temperature administration. It additionally encompasses a CAN interface that permits monitoring and management by a PC-based graphical consumer interface, enabling exact management over its operations.
Wolfspeed has examined this reference design. It comes with a invoice of supplies (BOM), schematics, printed circuit board (PCB) structure, and extra. 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.
