Abstract
High Frequency LLC requires a smaller resonant inductance which is usually implemented by transformer leakage inductance. However, this small resonant inductance is difficult to deal with a wide input voltage range. This paper proposes a new method to implement a larger resonant inductance by using a magnetic shunt integrated into planar transformer. The switching frequency can be greatly narrowed by designing a smaller inductance ratio of magnetizing inductance to resonant inductance. Since this method can well deal with a wide input voltage range without adding extra inductor and increasing the size of the transformer, the power density can be improved. The precise leakage inductance calculation method for this transformer and detailed LLC converter design procedure are presented. A 280-380V and 48V-100W half bridge LLC resonant converter
with 1 MHz resonant frequency is built to verify the design methodology.
with 1 MHz resonant frequency is built to verify the design methodology.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of IEEE Applied Power Electronics Conference and Exposition |
| Publisher | IEEE |
| Publication date | 2018 |
| Pages | 2678-2685 |
| ISBN (Print) | 978-1-5386-1180-7 |
| Publication status | Published - 2018 |
| Event | 2018 IEEE Applied Power Electronics Conference and Exposition - Henry B. Gonzalez Convention Center, San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018 https://ieeexplore.ieee.org/xpl/conhome/8336027/proceeding |
Conference
| Conference | 2018 IEEE Applied Power Electronics Conference and Exposition |
|---|---|
| Location | Henry B. Gonzalez Convention Center |
| Country/Territory | United States |
| City | San Antonio |
| Period | 04/03/2018 → 08/03/2018 |
| Internet address |
Keywords
- Magnetic shunt
- LLC resonant converter
- Planar transformer
- Narrowed swithing frequency