Two-phase three-dimension common inductor LLC resonant converter with automatic current sharing

Wang, Hongliang; Chen, Yang; Sheng, Bo; Liu, Yanfei; Sen, P.C.

doi:10.1109/apec.2018.8341620

Cited by 6 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al propose a method of sharing an inductor between the resonant networks of two converters. 17 Li et al propose a transformer with a coupling structure to achieve current sharing between the two circuits. 18 These methods use special magnetic devices for balancing.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adaptive droop control strategy of parallel LLC converters

Tang,

Xu,

Pei

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

When the resonant converters are connected in parallel, the output current is unbalanced without additional current‐sharing measures due to differences in resonant component. In the input‐parallel output‐parallel resonant converter system, the output voltage accuracy of the converter under the traditional droop control is analyzed when the load changes. In this paper, an adaptive droop control is proposed, in which the droop coefficient is adaptively adjusted as the load changes. The control method proposed in this paper realizes the current sharing between the converters and solves the shortcomings of the output voltage changing under different loads in the conventional droop control. Taking two parallel LLC converters as an example, the control block diagram of the parallel control method for adaptive adjustment of the droop coefficient proposed in this paper is given, and the stability of the control loop is analyzed. Finally, two parallel prototypes of LLC converters with input 200 V/output 24 V input are built by digital control, and the experiment shows that the proposed control method improves the shortcomings of excessive output voltage droop caused by traditional droop control during dynamic load switching, which verifies the effectiveness of the method.

show abstract

Section: Introductionmentioning

confidence: 99%

“…These methods achieve current sharing by changing the wiring of the transformer. Wang et al propose a method of sharing an inductor between the resonant networks of two converters 17 . Li et al propose a transformer with a coupling structure to achieve current sharing between the two circuits 18 .…”

Section: Introductionmentioning

confidence: 99%

Adaptive droop control strategy of parallel LLC converters

Tang,

Xu,

Pei

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…The passive current-sharing method utilizes the characteristics of passive components (inductors and capacitors) or alters the circuit structure to balance the current across various modules [2][3][4][5]. However, it poses challenges in achieving free expansion for multiple phases and implementing interleaved parallel control.…”

mentioning

confidence: 99%

A partial energy current‐sharing method for interleaved LLC converter with phase shift current balance module

Chen,

Ren,

Yao

2024

Electronics Letters

View full text Add to dashboard Cite

A partial energy current‐sharing method for an interleaved LLC resonant converter with a phase shift current balance module (CBM) is presented in this paper. The current sharing is achieved by controlling the phase shift angle of the bridge in the CBM. The proposed method maintains excellent soft‐switching performance, minimizes power losses, and ensures high overall efficiency as only partial energy is processed. This method simplifies current sharing in the resonant converter by using phase shift control, making it easy to implement and extend to multiple phases. A 500‐kHz two‐phase interleaved LLC prototype was built to validate the effectiveness of this method in achieving current balancing.

show abstract