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The Closed Loop Control of Non -Isolated DC-DC Converter Using One Cycle Control
Abstract
The conventional DC–DC converters have the disadvantages of operating at high duty-cycle, high switch voltage stress and high diode peak current. Non-isolated high step up converter overcomes this drawback. This converter reduces voltage stress on switch by using clamped-capacitor circuit which is helpful to reduce the conduction losses by using low power rated components and efficiency will increase. Single switch is used in the non-isolated high step up converter, thus reduce the entire cost of the converter. The energy stored in leakage inductance of coupled inductor is efficiently recycled to the output. The voltage doubler circuit is added for further extending the voltage gain. The control strategy is the one cycle control. By the application of this technique the performance of the converter is improved. This non-isolated high step-up converter is used in many applications such as renewable energy system using low voltage energy sources such as fuel cells, solar panels, photo voltaic cell. The leakage inductance energy of coupled inductor is recycled to the output. The simulation of the circuit with 30 V input, 380V output is done using MATLAB.
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References
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