Coupled inductors design of the bidirectional non‐inverting buck–boost converter for high‐voltage applications

González-Castaño, Catalina; Restrepo, Carlos; Giral, Roberto; García-Amorós, Jordi; Vidal-Idiarte, Enric; Calvente, J.

doi:10.1049/iet-pel.2019.1479

Cited by 9 publications

(18 citation statements)

References 25 publications

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“…The thermal model to obtain the conduction and switches losses for the MOSFET was implemented in PLECS, this simulation is carried out using the heat sink components for the power device SCT2450KEC employed for the DC-DC converters. The power inductor losses estimation for the inductors takes into account the inductor design presented in [ 46 ], where the core used is the 77908 from Magnetics, which has a Kool Mμ material with a core relative permeability coefficient of 26, and the windings wire size is 18 AWG. The generalized block diagram of the buck-boost converters in AC–DC applications for current regulation is shown in Figure 6 .…”

Section: Simulation and Real-time Hil Resultsmentioning

confidence: 99%

“…The pair of coupled inductors has an unitary ideal turns ratio

, a coupling coefficient k = 0.5, a mutual inductance M = 135 μH, and equal values for the primary (

) and secondary (

) self-inductances, being

μH. In this analysis, the use of the state-space averaging (SSA) method to model the converter leads to the following set of differential equations [ 45 ]:

The converter introduced in [ 46 ] for high-voltage applications has an input voltage

range of 200–400 V, and an output voltage range

from 0 V to 400 V. Experimental efficiencies reported in [ 46 ] demonstrate high values over 95% in all the operation range, with a maximum value of 98% when the input and output voltages of the converter are near. Table 1 presents the current and voltage ripple for the VBB converter.…”

Section: Modeling Of Dc-dc Buck-boost Convertersmentioning

confidence: 99%

“…The values of the mutual inductor and the self-inductance were selected based on Table 1 to obtain a current ripple

A at a switching frequency of 100 kHz for boost mode (

V and

V), which represents the most critical mode. The method to select the value for the components C d , C and R d is presented in [ 46 ]. The selection is a tradeoff between the capacitor size and ensures adequate and robust damping of the internal dynamics; the expression corresponds to:

…”

Section: Modeling Of Dc-dc Buck-boost Convertersmentioning

confidence: 99%

See 2 more Smart Citations

DC Voltage Sensorless Predictive Control of a High-Efficiency PFC Single-Phase Rectifier Based on the Versatile Buck-Boost Converter

González-Castaño

Restrepo

Sanz

et al. 2021

Sensors

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Many electronic power distribution systems have strong needs for highly efficient AC-DC conversion that can be satisfied by using a buck-boost converter at the core of the power factor correction (PFC) stage. These converters can regulate the input voltage in a wide range with reduced efforts compared to other solutions. As a result, buck-boost converters could potentially improve the efficiency in applications requiring DC voltages lower than the peak grid voltage. This paper compares SEPIC, noninverting, and versatile buck-boost converters as PFC single-phase rectifiers. The converters are designed for an output voltage of 200 V and an rms input voltage of 220 V at 3.2 kW. The PFC uses an inner discrete-time predictive current control loop with an output voltage regulator based on a sensorless strategy. A PLECS thermal simulation is performed to obtain the power conversion efficiency results for the buck-boost converters considered. Thermal simulations show that the versatile buck-boost (VBB) converter, currently unexplored for this application, can provide higher power conversion efficiency than SEPIC and non-inverting buck-boost converters. Finally, a hardware-in-the-loop (HIL) real-time simulation for the VBB converter is performed using a PLECS RT Box 1 device. At the same time, the proposed controller is built and then flashed to a low-cost digital signal controller (DSC), which corresponds to the Texas Instruments LAUNCHXL-F28069M evaluation board. The HIL real-time results verify the correctness of the theoretical analysis and the effectiveness of the proposed architecture to operate with high power conversion efficiency and to regulate the DC output voltage without sensing it while the sinusoidal input current is perfectly in-phase with the grid voltage.

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Section: Simulation and Real-time Hil Resultsmentioning

confidence: 99%

“…The pair of coupled inductors has an unitary ideal turns ratio

, a coupling coefficient k = 0.5, a mutual inductance M = 135 μH, and equal values for the primary (

) and secondary (

) self-inductances, being

μH. In this analysis, the use of the state-space averaging (SSA) method to model the converter leads to the following set of differential equations [ 45 ]:

The converter introduced in [ 46 ] for high-voltage applications has an input voltage

range of 200–400 V, and an output voltage range

Section: Modeling Of Dc-dc Buck-boost Convertersmentioning

confidence: 99%

“…The values of the mutual inductor and the self-inductance were selected based on Table 1 to obtain a current ripple

A at a switching frequency of 100 kHz for boost mode (

V and

…”

Section: Modeling Of Dc-dc Buck-boost Convertersmentioning

confidence: 99%

See 1 more Smart Citation

DC Voltage Sensorless Predictive Control of a High-Efficiency PFC Single-Phase Rectifier Based on the Versatile Buck-Boost Converter

González-Castaño

Restrepo

Sanz

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is composed of a 400 V 1.6 kW buck-boost prototype converter with the parameters described in Table 1 and the TMS320F28377S DSC. The design of the buck-boost converter is presented in [32].…”

Section: Simulation and Experimental Resultsmentioning

confidence: 99%

“…The fulfillment of Conditions ( 11) and ( 14), which guarantee a stable digital two-loop control, have been verified using a buck-boost converter with coupled inductors. The topology of the dc-dc buck-boost converter for a voltage regulation application shown in Figure 2 was introduced as an unidirectional buck-boost converter in [30] and presented for electric vehicle and high-voltage application in [31,32]. The bidirectional power stage shown in Figure 2 is composed of two coupled inductors with unitary turns ratio and magnetic coupling coefficient k = 0.5.…”

Section: Validation Of the Restrictionsmentioning

confidence: 99%

ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines

et al. 2020

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This paper analyzes the presence of undesired quantization-induced perturbations (QIP) in a dc-dc buck-boost converter using a two-loop digital current control. This work introduces design conditions regarding control laws gains and signal quantization to avoid the quantization effects due to the addition of the outer voltage loop in a digital current controlled converter. The two-loop controller is composed of a multisampled average current control (MACC) in the inner current-programmed loop and a proportional-integrator compensator at the external loop. QIP conditions have been evaluated through simulations and experiments using a digitally controlled pulse width modulation (DPWM) buck-boost converter. A 400 V 1.6 kW proof-of-concept converter has been used to illustrate the presence of QIP and verify the design conditions. The controller is programmed in a digital signal controller (DSC) TMS320F28377S with a DPWM with 8.96-bit equivalent resolution, a 12-bit ADC for current sampling, and a 12-bit ADC for voltage sampling or a 16-bit ADC for voltage error sampling.

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A novel adaptive cascade controller design on a buck–boost DC–DC converter with a fractional‐order PID voltage controller and a self‐tuning regulator adaptive current controller

Mollaee

Ghamari

Saadat

et al. 2021

IET Power Electronics

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The design of a cascade controller is demonstrated for a buck-boost converter that is combined with two control loops consisting of inner and outer controllers. The outer loop is implemented by a fractional-order proportional-integrated-derivative (FO-PID) controller that works as a voltage controller and generates a reference current for the inner control loop. To provide faster dynamic performance for inner loop, a self-tuning regulator adaptive controller, which tries to regulates the current with the help of a novel improved exponential regressive least square identification in an online technique, is designed. Moreover, in the outer loop, to tune the gains of the FO-PID controller, a novel algorithm of antlion optimizer algorithm is used that offers many benefits in comparison with other algorithms. The system provided by the boost mode is a non-minimum phase system, which creates challenges for designing a stable controller. In addition, a single loop controller is proposed based on a PID controller tuned by a particle swarm optimization algorithm to be compared with the cascade controller. Cascade loop can present significant benefits to the controller such as better disturbance rejection. Finally, the strength of the presented cascade control scheme is verified in different performing situations by real-time experiments.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Coupled inductors design of the bidirectional non‐inverting buck–boost converter for high‐voltage applications

Cited by 9 publications

References 25 publications

DC Voltage Sensorless Predictive Control of a High-Efficiency PFC Single-Phase Rectifier Based on the Versatile Buck-Boost Converter

DC Voltage Sensorless Predictive Control of a High-Efficiency PFC Single-Phase Rectifier Based on the Versatile Buck-Boost Converter

ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines

A novel adaptive cascade controller design on a buck–boost DC–DC converter with a fractional‐order PID voltage controller and a self‐tuning regulator adaptive current controller

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