Transformers as equivalent circuits for switches: general proofs and D-Q transformation-based analyses

Rim, Chun T.; Hu, Dong-Dong; Cho, G.H.

doi:10.1109/28.56005

Cited by 132 publications

(25 citation statements)

References 9 publications

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“…The boost converter and rectifier can be transformed to equivalent auto-transformers whose turn ratios are the complementary values of their corresponding switch duty cycles [19]. The boost converter and rectifier are assumed to operate in the continuous conduction mode (CCM) so that they can be replaced with the averaged switched transformers.…”

Section: B Derivation Of the Static Models Of The Led Lampmentioning

confidence: 99%

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

Park¹,

Choi²,

Cheon³

et al. 2014

Journal of Power Electronics

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A new active LED driver with high power factor (PF) and low total harmonic distortion (THD) compatible with a rapid-start ballast is proposed. An LC input filter is attached to the ballast to increase PF and reduce THD. A boost converter is then installed to regulate the LED current, where an unstable operating region has been newly identified. The unstable region is successfully stabilized by feedback control with two zeroes. The extremely high overall system of the 10th order is completely analyzed by the newly introduced phasor transformed circuits in static and dynamic analyses. Although a small DC capacitor is utilized, the flicker percentage of the LED is drastically mitigated to 1% by the fast controller. The proposed LED driver that employs a simple controller with a start-up circuit is verified by extensive experiments whose results are in good agreement with the design.

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Section: B Derivation Of the Static Models Of The Led Lampmentioning

confidence: 99%

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

Park¹,

Choi²,

Cheon³

et al. 2014

Journal of Power Electronics

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show abstract

“…In this paper, the DQ method [15][16][17] and the generalized state-space averaging (GSSA) method [18][19][20] are used to eliminate the switching behavior of diode and switch Q, respectively. As a result, the time-invariant model is achieved.…”

Section: State-space Averaging Modelmentioning

confidence: 99%

The Optimal Controller Design of Buck-Boost Converter by using Adaptive Tabu Search Algorithm Based on State-Space Averaging Model

Pakdeeto¹,

Chanpittayagit²,

Areerak³

2017

Journal of Electrical Engineering and Technology

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-Normally, the artificial intelligence algorithms are widely applied to the optimal controller design. Then, it is expected that the best output performance is achieved. Unfortunately, when resulting controller parameters are implemented by using the practical devices, the output performance cannot be the best as expected. Therefore, the paper presents the optimal controller design using the combination between the state-space averaging model and the adaptive Tabu search algorithm with the new criteria as two penalty conditions to handle the mentioned problem. The buck-boost converter regulated by the cascade PI controllers is used as the example power system. The results show that the output performance is better than those from the conventional design method for both input and load variations. Moreover, it is confirmed that the reported controllers can be implemented using the realistic devices without the limitation and the stable operation is also guaranteed. The results are also validated by the simulation using the topology model of MATLAB and also experimentally verified by the testing rig.

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“…The applications of averaging methods have been also extended to modeling, analysis, and control of three-phase rectifiers and inverters [49][50][51][52][53][54][55][56][57][58]. A general methodology for deriving state-space equations for PWM dc-dc converters, inverters, rectifiers and cycloconverters has been developed in [49].…”

Section: General Methodology For Modeling Invertersmentioning

confidence: 99%

“…Besides the general methodology, described in this section, an enormous number of studies have been carried out in the field of dynamic modeling and control of rectifiers and inverters [50][51][52][53][54][55][56][57][58]. A systematic approach for the small-signal modeling and control design of three-phase PWM rectifiers has been presented in [50][51].…”

Section: General Methodology For Modeling Invertersmentioning

confidence: 99%

“…In case of a system with a high number of reactive elements, [53] proposes to transform the nonlinear switching devices into equivalent linear ac networks by the use of equivalent time-varying transformers, and then deal with the system like a linear ac power system. The method has been applied to an eight-order system (a current source rectifier-inverter) and a buck-boost inverter, and promising results have been achieved.…”

Section: Transformer-based Equivalent Circuitsmentioning

confidence: 99%

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Dynamic Modeling and Analysis of Single-Stage Boost Inverters under Normal and Abnormal Conditions

Kaviani¹

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Transformers as equivalent circuits for switches: general proofs and D-Q transformation-based analyses

Cited by 132 publications

References 9 publications

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

The Optimal Controller Design of Buck-Boost Converter by using Adaptive Tabu Search Algorithm Based on State-Space Averaging Model

Dynamic Modeling and Analysis of Single-Stage Boost Inverters under Normal and Abnormal Conditions

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