Average and Small‐Signal Modeling of Self‐Oscillation Control

Suntio, Teuvo

doi:10.1002/9783527626014.ch6

Cited by 1 publication

(4 citation statements)

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“…The equivalent control is calculated within the surface and with a trajectory parallel to the surface Ψ = 0 and dΨ dt = 0 [37,38], replacing u by its averaged value d. Hence, solving switching function derivative (22) equal to zero, for u eq = d, results as follows:…”

Section: Equivalent Control Conditionmentioning

confidence: 99%

“…A state-of-the-art in this topic shows that the flyback converter has been used to implement battery charging systems for generic applications [21,22], electric vehicles [23][24][25][26], phones [27], PV systems [28,29], and microgrids [6]. Additionally, the flyback converter has also been used for other applications involving batteries like power supply of DC motors [19,30], LED drivers [20], and rectifiers [31].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding the controllers proposed in the literature for battery charging systems that use flyback converters, most of the papers use linear controllers, while others use specialized controllers (like peak current control [21,34] or fuzzy controller [23]) or do not include a control structure [22,29,[31][32][33]35]. A cascade controller is used in [24][25][26], where the outer loop is a PI controller to regulate v b , and the inner loop is a PI that tracks a reference of the battery current (i b ).…”

Section: Introductionmentioning

confidence: 99%

“…The previous reachability conditions are analyzed by replacing the switching function derivative (22) into inequalities ( 27) and (28), obtaining the design expressions given in ( 29) and (30), respectively, where expressions (15) and ( 16) have also been used.…”

mentioning

confidence: 99%

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Design and Control of a Battery Charger/Discharger Based on the Flyback Topology

2021

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Devices connected to microgrids require safe conditions during their connection, disconnection and operation. The required safety is achieved through the design and control of the converters that interface elements with the microgrid. Therefore, the design of both power and control stages of a battery charger/discharger based on a flyback is proposed in this paper. First, the structure of a battery charger/discharger is proposed, including the battery, the flyback, the DC bus, and the control scheme. Then, three models to represent the battery charger/discharger are developed in this work; a switched model, an averaged model, and a steady-state model, which are used to obtain the static and dynamic behavior of the system, and also to obtain the design equations. Based on those models, a sliding-mode controller is designed, which includes the adaptive calculation of one parameter. Subsequently, a procedure to select the flyback HFT, the output capacitor, and the Kv parameter based on operation requirements of the battery charger/discharger is presented in detail. Five tests developed in PSIM demonstrate the global stability of the system, the correct design of the circuit and controller parameters, the satisfactory regulation of the bus voltage, and the correct operation of the system for charge, discharge and stand-by conditions. Furthermore, a contrast with a classical PI structure confirms the performance of the proposed sliding-mode controller.

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Section: Equivalent Control Conditionmentioning

confidence: 99%