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Updates found with 'effectiveness'

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Updates found with 'effectiveness'

POWER ELECTRONICS ABSTRACT 2016-2017 UNIFIED TRIPLE-PHASE-SHIFT CONTROL TO MINIMIZE CURRENT STRESS AND ACHIEVE FULL SOFT SWITCHING OF ISOLATED BIDIRECTIONAL DC-DC CONVERTERABSTRACT:This paper presents a comprehensive analysis of the current stress optimization and soft switching operation of the isolated bidirectional dual active bridge (DAB) dc-dc converter with the unified triple-phase-shift (TPS) control. On this basis, the current stress optimized modulation scheme is proposed for DAB, which leads to the minimum current stress with the required transmission power and voltage conversion ratio in the whole load range. Moreover, the full soft switching operation is achieved for the converter simultaneously. Distinct from previous modulation schemes, the proposed optimized modulation scheme is deduced from a unified analysis of TPS where all effective switching modes are investigated. A novel algorithm based on the Karush-Kuhn- Tucker (KKT) conditions is originally proposed to derive closed- form solutions for the global optimal control parameters. This paper also presents a typical closed-loop control strategy for DAB with TPS control and detailed descriptions about the closed-loop operation. A laboratory prototype is applied and the experimental results validate that the current stress optimization and efficiency improvement are realized by applying the optimized modulation scheme. The experimental results also verify the effectiveness of the closed-loop control strategy for DAB with TPS control.
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