| Title |
The Control Method of 3-Phase Interleaved DC-DC Converter for High Speed H/L Pulse Operation |
| Authors |
김동일(Dong-Il Kim) ; 전병영(Byung-Young Chun) ; 전동훈(Dong-Hoon Jeon) ; 문상필(Sang-Pil Mun) ; 우경일(Kyung-Il Woo) |
| DOI |
https://doi.org/10.5370/KIEEP.2023.72.4.289 |
| Keywords |
Plasma Extinguishing and Realizing; Radio Frequency(RF); Generators; Realizing H/L Pulse Operation; Step-down DC-DC Converter |
| Abstract |
Therefore, in order to realize high-speed H/L pulse operation, a DC-DC converter that realizes high-speed response speed is required. Methods for controlling these DC-DC converters include PI control, hysteresis control, and model prediction control, but output dead beat control is used to realize fast and precise voltage transitions. At this time, control considering three-phase interleaving of the step-down DC-DC converter, higher switching frequency, and delay time is possible. At this time, a batch control that operates by phase shifting the duty cycle of the reference phase in a three-phase interleaved circuit and an individual control that controls the duty cycle of each phase were proposed. In addition, high-speed H/L pulse operation was realized using capacitor current feedback capable of high-speed detection.
In the experiment, the switching frequency was 800 [kHz], the pulse frequency was 10[kHz], and H/L pulse operation of 280[V] / 70[V] was realized, and the voltage transition time from L to H achieved 6.7[μs]. |