The Fault-Tolerant Single-Switch DC-DC Converter with High Voltage Gain

• Published in: 2021 International Conference on Power, Energy and Innovations (ICPEI) pp. 49 - 52
• Main Authors: Kongkanjana, Kuagoon, Khwan-on, Sudarat
• Format: Conference Proceeding
• Language: English
• Published: IEEE 20.10.2021
• Subjects: boost converter; Current measurement; Event detection; Fault detection; Fault tolerance; Fault tolerant systems; high conversion gain; PI Controller; Simulation; single-switch converter; Technological innovation
• DOI: 10.1109/ICPEI52436.2021.9690693

This paper proposes the fault tolerance for a single-switch DC-DC converter with high voltage gain in order to maintain the continuous operation when the open-circuited switch fault occurred. The single-switch DC-DC converter with high voltage gain can achieve a high output voltage of about 400V from the low input voltage about 20V. However, during open-circuited switch fault operations, the single-switch DC-DC converter with high voltage gain cannot maintain a desired constant output voltage and the continuous operation cannot be achieved. In this paper, fault detection and fault tolerance methods are introduced to the single-switch DC-DC converter with high voltage gain. The input current is used for open-circuited switch fault. After the fault is detected, the redundant switch will be activated in order to immediately operate instead of the failed switch, providing the fault tolerance to the converter. The effectiveness of the proposed fault-tolerant single-switch DC-DC converter with high voltage gain is verified through the simulation results under different healthy and faulty operations.