Abstract
Minimizing the transformer magnetizing inductance is essential for the soft switching operation of the LLC resonant converter, despite the fact that it results in higher values of magnetizing current, which deteriorates the converter efficiency. Furthermore, it is a well-known practice to utilize the transformer leakage as an inductive component in the resonant tank to improve the power destiny. This paper reveals that the transformer voltage gain can be improved when the transformer leakage inductance in concentrated on the secondary side to avoid the voltage drop inflicted by the relatively large value of the magnetizing current (im), especially at light load condition. The theoretical discussion relies on the asymmetry of the EI core by placing the secondary winding in a close contact with the magnetic core and placing the primary winding in the vicinity of the air gap. Moreover, noise absorber had been utilized to control the leakage inductance value. The proposed transformer design maximizes the value of the secondary leakage inductance and minimizes the primary leakage inductance. Alongside with the theoretical discussion, experimental tests had been conducted to evaluate the proposed method using a 390V-12V, 220W LLC resonant converter.
| Original language | English |
|---|---|
| Title of host publication | 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 780-786 |
| Number of pages | 7 |
| ISBN (Electronic) | 9781538683309 |
| DOIs | |
| Publication status | Published - May 24 2019 |
| Event | 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, United States Duration: Mar 17 2019 → Mar 21 2019 |
Publication series
| Name | Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC |
|---|---|
| Volume | 2019-March |
Conference
| Conference | 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 |
|---|---|
| Country | United States |
| City | Anaheim |
| Period | 3/17/19 → 3/21/19 |
Fingerprint
Keywords
- Dc/dc converter
- Leakage inductance
- LLC resonant converter
- Magnetic cores
- Soft switching converters
- Transformer
ASJC Scopus subject areas
- Electrical and Electronic Engineering
Cite this
Effects of secondary leakage inductance on the LLC resonant converter - Part i : Transformer voltage gain and efficiency. / Noah, Mostafa; Shirakawa, Tomohide; Umetani, Kazuhiro; Imaoka, Jun; Yamamoto, Masayoshi; Hiraki, Eiji.
34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019. Institute of Electrical and Electronics Engineers Inc., 2019. p. 780-786 8721980 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC; Vol. 2019-March).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Effects of secondary leakage inductance on the LLC resonant converter - Part i
T2 - Transformer voltage gain and efficiency
AU - Noah, Mostafa
AU - Shirakawa, Tomohide
AU - Umetani, Kazuhiro
AU - Imaoka, Jun
AU - Yamamoto, Masayoshi
AU - Hiraki, Eiji
PY - 2019/5/24
Y1 - 2019/5/24
N2 - Minimizing the transformer magnetizing inductance is essential for the soft switching operation of the LLC resonant converter, despite the fact that it results in higher values of magnetizing current, which deteriorates the converter efficiency. Furthermore, it is a well-known practice to utilize the transformer leakage as an inductive component in the resonant tank to improve the power destiny. This paper reveals that the transformer voltage gain can be improved when the transformer leakage inductance in concentrated on the secondary side to avoid the voltage drop inflicted by the relatively large value of the magnetizing current (im), especially at light load condition. The theoretical discussion relies on the asymmetry of the EI core by placing the secondary winding in a close contact with the magnetic core and placing the primary winding in the vicinity of the air gap. Moreover, noise absorber had been utilized to control the leakage inductance value. The proposed transformer design maximizes the value of the secondary leakage inductance and minimizes the primary leakage inductance. Alongside with the theoretical discussion, experimental tests had been conducted to evaluate the proposed method using a 390V-12V, 220W LLC resonant converter.
AB - Minimizing the transformer magnetizing inductance is essential for the soft switching operation of the LLC resonant converter, despite the fact that it results in higher values of magnetizing current, which deteriorates the converter efficiency. Furthermore, it is a well-known practice to utilize the transformer leakage as an inductive component in the resonant tank to improve the power destiny. This paper reveals that the transformer voltage gain can be improved when the transformer leakage inductance in concentrated on the secondary side to avoid the voltage drop inflicted by the relatively large value of the magnetizing current (im), especially at light load condition. The theoretical discussion relies on the asymmetry of the EI core by placing the secondary winding in a close contact with the magnetic core and placing the primary winding in the vicinity of the air gap. Moreover, noise absorber had been utilized to control the leakage inductance value. The proposed transformer design maximizes the value of the secondary leakage inductance and minimizes the primary leakage inductance. Alongside with the theoretical discussion, experimental tests had been conducted to evaluate the proposed method using a 390V-12V, 220W LLC resonant converter.
KW - Dc/dc converter
KW - Leakage inductance
KW - LLC resonant converter
KW - Magnetic cores
KW - Soft switching converters
KW - Transformer
UR - http://www.scopus.com/inward/record.url?scp=85067102349&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067102349&partnerID=8YFLogxK
U2 - 10.1109/APEC.2019.8721980
DO - 10.1109/APEC.2019.8721980
M3 - Conference contribution
T3 - Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
SP - 780
EP - 786
BT - 34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
ER -