Abstract
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.
Highlights
Research and development in the field of renewable energy application is becoming increasingly active due to the increase in environmental pollution and the exhaustion of fossil fuels.In response to social trends, there is a growing interest in environmentally-friendly electric vehicles and hybrid vehicles for the rail or the automotive industries
For energy storage system applications that use super capacitors, a voltage controller with quick response characteristics is required for fast charging of the super capacitor
It is desirable to use a combination of a peak current mode controller, an inner loop current controller, and an outer loop voltage controller to achieve fast response characteristics
Summary
Research and development in the field of renewable energy application is becoming increasingly active due to the increase in environmental pollution and the exhaustion of fossil fuels.In response to social trends, there is a growing interest in environmentally-friendly electric vehicles and hybrid vehicles for the rail or the automotive industries. Research and development in the field of renewable energy application is becoming increasingly active due to the increase in environmental pollution and the exhaustion of fossil fuels. Various research projects have been carried out to investigate regenerative braking, which stores wasted energy by converting kinetic energy into electric energy when the vehicle decelerates [1,2,3,4]. As research into regenerative braking becomes more active, the importance of fast storage of electric energy is increasing. For energy storage system applications that use super capacitors, a voltage controller with quick response characteristics is required for fast charging of the super capacitor. It is desirable to use a combination of a peak current mode controller, an inner loop current controller, and an outer loop voltage controller to achieve fast response characteristics
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