Deadbeat Control of Dual Active Bridge Converters With Adaptive Noise Resistance Ability

Although deadbeat control offers excellent dynamic performance for dual active bridge (DAB) converters with relatively simple computations, it is sensitive to sampling noise, which degrades system performance and even leads to instability. Existing approaches based on digital filters induce higher computational burden and alter the system pole locations affecting the inherent characteristics of deadbeat-controlled DABs. Therefore, this letter proposes a novel deadbeat control method with adaptive noise resistance ability for DABs. Instead of digital filters, an adaptive attenuation coefficient is used to efficiently and adaptively mitigate the impact of noises, using a simple structure. Combing with the compensation term derived from the system model, it introduces no steady-state error and preserves the original closed-loop pole locations, thereby maximally retaining the essential features of deadbeat control. Experimental results verify the effectiveness and superiority of the proposed method.