Fixed-Frequency K+D Modulation of Modular Multilevel Resonant DC-DC Converters for Output Voltage Overshoot Optimization
Modular multilevel resonant dc-dc converters (MMRDCs) are emerging as a competitive solution for medium wide input voltage-low voltage conversion, yet they often encounter output voltage overshoot when submodules insert or extract. In this article, a novel K+D control scheme of MMRDCs is proposed, w...
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| Veröffentlicht in: | IEEE transactions on power electronics 2025-03, Vol.40 (3), p.3927-3937 |
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| container_title | IEEE transactions on power electronics |
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| creator | Luo, Zuohao Wu, Zaijun Xie, Xingfeng Quan, Xiangjun Hu, Qinran Cao, Xiaoyong |
| description | Modular multilevel resonant dc-dc converters (MMRDCs) are emerging as a competitive solution for medium wide input voltage-low voltage conversion, yet they often encounter output voltage overshoot when submodules insert or extract. In this article, a novel K+D control scheme of MMRDCs is proposed, which combines both inserted submodule number K and adjusting width D. Output voltage overshoot could be greatly suppressed and soft switching characteristics could also be improved enormously based on the proposed K+D modulation strategy. The design of magnetic components would benefit from fixed-frequency control. Continuous dc voltage gain is analyzed which could effectively simplify the control loop. Simulations on a 200 kW MMRDC that converts 9-18 kV to 750 V have been presented to verify the effectiveness of theoretical analysis and control strategies. Experimental results from a prototype are also provided to demonstrate its feasibility. |
| doi_str_mv | 10.1109/TPEL.2024.3499354 |
| format | Article |
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| ispartof | IEEE transactions on power electronics, 2025-03, Vol.40 (3), p.3927-3937 |
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| source | IEEE Electronic Library (IEL) |
| subjects | Capacitors DC-DC power converters Fixed-frequency K+D control Inductors Low voltage Magnetic resonance modular multilevel resonant dc–dc converters (MMRDCs) Modulation Soft switching Switches Topology Voltage control wide input range |
| title | Fixed-Frequency K+D Modulation of Modular Multilevel Resonant DC-DC Converters for Output Voltage Overshoot Optimization |
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