Current ripple reduction in 4kW LLC resonant converter based battery charger for electric vehicles

Liu, Chaohui; Wang, Jiabin; Colombage, Kalhana; Gould, C.; Sen, Bhaskar; Stone, D.A.

doi:10.1109/ecce.2015.7310503

Cited by 14 publications

(7 citation statements)

References 15 publications

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“…The performance is even worse when parametric variations are taking into account. In fact, considering the resonant-based controllers, there is a trade-off between stability margin gains and ∆I O rejection for f ∆V variation, where a better ∆I O rejection results in a smaller phase margin [15] and vice-versa. Besides, it is impossible to overcome this issue in the design step due to the limitations of the small-signal models for the LLC converter considering operation beyond the series resonance [19].…”

Section: Proposed Hybrid Controller Analysismentioning

confidence: 99%

“…At this point, V sin [k] and V cos [k] are known. To define the automatic adapted parameters θ sin [k] and θ cos [k] the algorithm given in ( 6) is rewritten in (15) for the sake of readability.…”

Section: B Adaptive Periodic Disturbance Rejection Designmentioning

confidence: 99%

“…Analyzing (15) it is noticed that α is the only undefined parameter. Actually, α is the unique parameter of the APDR subsystem whose definition depends on the application and control-loop performance specifications.…”

Section: B Adaptive Periodic Disturbance Rejection Designmentioning

confidence: 99%

“…Employing classical control theory, in [14] the Integrator Quasi-resonant (IQR) controller is designed for the LLC LED driver to achieve reduced ∆I LED over a wide dimming range even with a considerable ∆V BUS at 120 Hz. Similarly, in [15] a proportional-integral resonant (PIR) controller is employed to suppress the LF output current ripple (∆I O ) in an LLC based electrical vehicle battery charger. Investigating the mechanism of ∆I O propagation in a digitally controlled LLC converter, in [16] the synchronous frequency dither is proposed to reduce the quantization error and attenuate ∆I O .…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Dual-Loop Control for Current Regulation and Low-Frequency Ripple Rejection in Led Drivers

Menke¹,

Álvarez²,

Tambara³

et al. 2021

Eletrônica de Potência

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This paper presents a new hybrid dualloop control system for the DC/DC LLC resonant converter, operating as a downstream DC/DC converter in a two independent stage offline LED driver. The outer loop employs a PI controller to maintain the average LED current regulated at the reference value and reject parametric variation.The inner loop implements an adaptive periodic disturbance rejection (APDR) subsystem, thus conceiving the hybrid PI&APDR controller. The APDR subsystem is designed to strictly reject the bus voltage ripple and limit its transmission to the LED current. Experimental results show the proposed controller feasibility in achieving good tracking behavior, reduced output current ripple under different bus voltage ripple amplitude and frequency, robustness against parametric variations, and simple implementation and design. For the sake of completeness, the proposed PI&APDR is compared with the conventional proportional resonant controller employing experimental results and extra analysis based on simulations.

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Section: Proposed Hybrid Controller Analysismentioning

confidence: 99%

Section: B Adaptive Periodic Disturbance Rejection Designmentioning

confidence: 99%

Section: B Adaptive Periodic Disturbance Rejection Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid Dual-Loop Control for Current Regulation and Low-Frequency Ripple Rejection in Led Drivers

Menke¹,

Álvarez²,

Tambara³

et al. 2021

Eletrônica de Potência

View full text Add to dashboard Cite

show abstract

“…The SRDAB and DAB are compared in [7] and although the resonant topology presents better efficiency both topologies have weak performance for wide voltage range operation. The LLC converter is an improved topology for battery chargers with high efficiency, high power density and low electromagnetic interference (EMI) [8][9][10][11]. Due to loss of soft switching operation during reverse mode, the LLC topology is more suitable for unidirectional power transfer [12].…”

Section: Introductionmentioning

confidence: 99%

Modelling of phase‐shift modulated bidirectional CLLC resonant converter

Martins

Stone

Foster

2020

IET power electron.

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The paper proposes the application of two modelling techniques for analysis of bidirectional CLLC resonant converters. The state-variable and cyclic-averaging techniques are applied for converters operating under two types of phase-shift modulation: single-phase-shift (SPS) and pulse-phase modulation (PPM). The converter is analysed considering forward and reverse power flow directions and a state-variable equation description is obtained for both modes. The models are first validated through simulation, comparing the state-variable and cyclic-averaging results to a Spice-based simulation. Additionally, a low power prototype is built, experimental results are presented and the influence of parasitic elements and system delays is discussed. Simulation and experimental results show the models can accurately represent the behaviour of CLLC converters for both types of phase-shift modulation. In addition, using the cyclic-averaging technique results in a considerably faster execution compared to state-variable and Spice-based models.

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