Details

Autor(en) / Beteiligte

• Hwu, K. I.
• Chuang, C. F.
• Yau, Y. T.

Titel

Pulse-Frequency-Modulated Digital Control of Power Supply Without Analog-to-Digital Converter Using Positive-Sloped Ramp Wave Injection

Ist Teil von

• IEEE transactions on industrial informatics, 2013-05, Vol.9 (2), p.739-748

Ort / Verlag

Piscataway: IEEE

Erscheinungsjahr

2013

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• In this paper, a counter-based pulse-frequency-modulated (PFM) control strategy according to the output voltage ripple using a one-comparator scheme without any analog-to-digital converter (ADC) used is presented, which is realized based on the field programmable gate array (FPGA) and applied to DC-DC converters. However, too small or distorted output ripple limits its performance. Consequently, a positive-sloped ramp wave injection method is used to overcome this problem and enhances its application capability significantly. First of all, the details of the positive-sloped ramp wave injection method are illustrated, and second some experimental results are provided to verify the effectiveness of the proposed control strategy.