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Design of Integrated Transformer and Inductor for a High-Power High-Frequency Resonant Converter
Year: 2022 | Author: Tianlong Yuan | Paper: H-S5.4
Fig. 1. Serial Half Bridge Topology
The transformer structure is as shown in in Figure 2. Fig. 2 gives some cases with different leakage inductance and current sharing waveform. The leakage inductance between the winding on the same leg is more important for current sharing. 13% difference on leakage inductance between Lk_pri1sec2 and Lk_pri2sec1 only causes 2% current difference. But 30% difference between Lk_pri1sec1 and Lk_pri2sec2 causes 31% current difference. However, the structure in Fig. 2(b) can be avoided using bobbin and Fig. 2(c) is not mechanical stable, so both cases can be avoided.
Fig. 2. Current sharing for difference in winding structure
