Frequency- and Mode-Adaptive Control of DC-DC Converter for Efficency Improvement
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 8Language: englishTyp: PDF
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Authors:
Keuck, Lukas; Almai, Farshid; Bolte, Sven; Froehleke, Norbert; Boecker, Joachim (Paderborn University, Power Electronics and Electrical Drives, Paderborn, Germany)
Abstract:
It is common practice to operate Two-Quadrant-Converters with a constant switching frequency. However, the loss-optimal switching frequency strongly depend on the operation point thus for most operation points the selected frequency leads to higher losses than necessary. This paper presents a derived loss model which can be used to find the loss-optimal switching frequency. The presented model is easily computable on todays DSPs, thus allows frequency adaption on the run. A lab-prototype was built in order to verify the performance enhancement enabled by the proposed model. Experimental results are presented which show an efficiency improvement of approx. 1%.