期刊
ELECTRONICS
卷 8, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/electronics8010112
关键词
super capacitor; peak current mode control; sub-harmonic oscillation; slope compensation; valley current mode control
资金
- Industrial Strategic Technology Development Program (KEIT) - Ministry of Trade, Industry & Energy (MOTIF) of the Republic of Korea [201801180001]
- Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) from the Ministry of Trade, Industry & Energy, Republic of Korea [20184030202270]
A wide-bandwidth current-controller is required for the fast charging and discharging of applications containing super capacitors. To accomplish this, peak current mode is generally used due to the speed of its response characteristics. On the other hand, peak current mode control must be provided with a slope compensation function to restrain sub-harmonic oscillations. However, if the controlled output voltage is varied, the slope must be changed accordingly. Nonetheless, it is not easy to change the slope for every change in output voltage. Another solution involves the slope being set at the maximum value, which results in a slow response. Therefore, in this paper, a hybrid mode controller was proposed that uses a peak current and a newly-specified valley current. Using the proposed hybrid mode control, sub-harmonic oscillation did not occur for duty cycles larger than 0.5 and response times were fast.
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