Unity power factor three‐phase AC–DC converter applying two switch DCM SEPIC converter with coupled inductors

Foroozeshfar, Reza; Adib, Ehsan

doi:10.1049/iet-pel.2017.0720

Cited by 3 publications

(4 citation statements)

References 20 publications

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“…Six controlled switch converters are effective for high power levels, but when it comes to systems with lower power levels, where only unidirectional power flow is required, rectifiers with a reduced number of active elements (single or three controlled switches) operating in the DCM are usually preferred, and the three-phase boost is the most used [7][8][9][10][11][12]. A variety of solutions has recently arisen [13][14][15][16][17][18][19][20][21][22]. In the analysis of the power conversion from the grid to DC bus, the input RMS voltage is almost constant, maintained in the range given by standards.…”

Section: Introductionmentioning

confidence: 99%

A DCM Single-Controlled Three-Phase SEPIC-Type Rectifier

et al. 2021

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A discontinuous conduction mode (DCM) three-phase single-ended primary-inductor converter (SEPIC) is presented in this article. The analyzed converter operates as a high-power factor stage in AC–DC conversion systems. As its main features, it presents three controlled switches and a single control signal with simple implementation and low-current harmonic distortion. The converter topology, its design equations, and its operation modes are presented as well as a simulation analysis considering a 3 kW–220 V three-phase input to 400 V DC output converter. The experimental results are included, considering as an application the rectifier stage in low-power wind energy conversion systems (WECS) based on a 1 kW permanent magnet synchronous generator (PMSG) with variable voltage frequencies. From the analysis performed in the paper and the simulation and experimental results revealed, it is concluded that the converter is indicated to be employed in any AC–DC low-power conversion system, such as DC distribution systems, and distributed generation or hybrid systems containing variable-frequency generation.

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Section: Introductionmentioning

confidence: 99%

A DCM Single-Controlled Three-Phase SEPIC-Type Rectifier

et al. 2021

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“…The SEPIC converter with coupled inductors demanding a lower self-inductance value for both input and output inductors for the given design specification, resulting in smaller size compared with the converter without coupling, is utilised for brushless direct current (BLDC) motor drive application in [19,20]. The DC-DC SEPIC with coupled inductors is used in a three-phase PFC circuit in [21]. The magnetic design and implementation of coupled inductors to meet desired converter performance by tuning the coupling coefficient are not detailed in the literatures [17][18][19][20][21] mentioned above.…”

Section: Introductionmentioning

confidence: 99%

“…The DC-DC SEPIC with coupled inductors is used in a three-phase PFC circuit in [21]. The magnetic design and implementation of coupled inductors to meet desired converter performance by tuning the coupling coefficient are not detailed in the literatures [17][18][19][20][21] mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Design of coupled inductors using split winding scheme for bridgeless SEPIC

Prabhu

Urundady

2020

IET Power Electronics

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A bridgeless single-ended primary inductance converter (SEPIC) is a highly preferred single-stage front-end AC-DC converter for applications requiring a wide variation of DC voltage because it also gives improved performance in terms of the quality of supply current. This study presents the design of coupled inductors for the bridgeless SEPIC using the split winding scheme. With coupling incorporated the required value of self-inductances of the input and output inductors for the same performance is reduced. Also, they can be wound on the same core, thereby resulting in a reduction in size. The conventional method of tuning the coupling coefficient by adjusting the air-gap is tedious. A split winding scheme for the distribution of windings over three limbs of E-core for obtaining the desired coupling coefficient is presented. The split winding scheme for the design of coupled inductors for bridgeless SEPIC converter rated for 500 W, 20 kHz is illustrated. The effect of coupling on the volume, weight, cost, and efficiency of the converter is compared with the conventional SEPIC converter without coupling for a similar performance. The performance of the proposed converter is evaluated using MATLAB/Simulink simulation and experimental results with a laboratory prototype rated for 500 W.

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“…Furthermore, the overall system should be implemented with high voltage rated switches, which increase cost and reduce efficiency. Two switch SEPIC converter with coupled inductors which is introduced in [14], provides almost unity power factor but SEPIC converter efficiency is lower than boost converter due to high voltage stress and current stress of switches. In [15], two switch boost converter with complicated variable frequency modulation is introduced.…”

Section: Introductionmentioning

confidence: 99%

Three‐phase ripple free DCM boost converter with low THD

Foroozeshfar¹,

Adib²

2019

IET Power Electronics

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High total harmonic distortion (THD) and ripple of input current are the two main disadvantages of a single switch discontinuous current mode boost power factor correction (PFC) converter. In this study, THD and input current ripple of conventional DCM boost converter are improved. Reduction of input current THD is achieved by reducing the discharge time of input inductors using magnetic switch concept. Input inductors currents are discharged with a voltage equal to twice of output voltage instead of the output voltage. Also, high input current ripple in discontinuous conduction mode (DCM) operation is solved by using an additional input inductor-capacitor (LC) filter in the conventional converter. This will result in extra weight and volume of the converter. To eliminate the required additional inductors for implementation of the mentioned input LC filter, a ripple cancellation cell using coupled inductors is used and by adjusting mutual inductance in a proper manner, very low input current ripple is achieved. Results from a 400 W prototype converter are presented. Input current THD is below 8% for a wide range of input voltage. Furthermore, the efficiency of the proposed converter is compared with conventional DCM boost PFC converter under the same input current THD. Although the proposed converter applies two switches, the total switching and conduction losses are reduced considerably.

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Unity power factor three‐phase AC–DC converter applying two switch DCM SEPIC converter with coupled inductors

Cited by 3 publications

References 20 publications

A DCM Single-Controlled Three-Phase SEPIC-Type Rectifier

A DCM Single-Controlled Three-Phase SEPIC-Type Rectifier

Design of coupled inductors using split winding scheme for bridgeless SEPIC

Three‐phase ripple free DCM boost converter with low THD

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