This paper introduces variable-frequency zero voltage switching (ZVS) modulation strategy for the four-switch buck+boost converter with one operating pattern for the inductor current, i.e., three-segment inductor current modulation control. The proposed modulation scheme guarantees a smooth transition from step-up to step-down or from step-down to step-up operating modes without abrupt duty cycle or switching frequency change. Triangular current mode (TCM) ZVS control could be derived from this three-segment inductor current modulation strategy. Moreover, the controller design can be simplified compared with other multi-mode control methods. Experimental results were given to validate the modulation control strategy based on a 300−600 V input, 400 V output, 3.3 kW prototype.
|Title of host publication||Proceedings of the 2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia)|
|Number of pages||6|
|Publication status||Published - 2023|
|Event||2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia) - Jeju Island, Korea, Republic of|
Duration: 22 May 2023 → 25 May 2023
Conference number: 11th
|Conference||2023 11th International Conference on Power Electronics and ECCE Asia (ICPE 2023 - ECCE Asia)|
|Country/Territory||Korea, Republic of|
|Period||22/05/23 → 25/05/23|
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- zero voltage switching (ZVS)
- variable frequency
- seamless transition