High frequency and high power density bipolar DC–DC converter with GaN HEMT

Yang, Yali; Liu, Yu; Zeng, Qingdian; Liu, Jiaxin; Zhu, Binxin

doi:10.1016/j.egyr.2023.04.110

Cited by 3 publications

(3 citation statements)

References 21 publications

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“…For frequencies below 1 MHz, the gain roll-off rate (slope) is −40 db/decade, which is equal to a rate of −24 db/octave. From the current loop plot, the converter may behave as an underdamped system with two real negative poles and one pole at the origin, which can be observed from the current gain transfer function [33,34]. The phase margin for a closed loop system is the additional amount of phase delay required for the phase of the open loop system to reach −180 • at a frequency where the magnitude of the open loop system is 0 dB.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…For frequencies below 1 MHz, the gain roll-off rate (slope) is −40 db/decade, which is equal to a rate of −24 db/octave. From the current loop plot, the converter may behave as an underdamped system with two real negative poles and one pole at the origin, which can be observed from the current gain transfer function [33,34]. Figure 16 depicts the dynamic response of the DSSB input/output voltage and current waveforms for a variable step response of the input source voltage using the parameters listed in Table 6.…”

Section: Simulation Resultsmentioning

confidence: 99%

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A New Double-Switch SEPIC-Buck Topology for Renewable Energy Applications

Emar,

Issa,

Kanaker

et al. 2024

Energies

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In addition to their conventional use in electric motor drives, DC-DC converters have a variety of other uses, such as energy storage, energy conversion, cyber security systems, uninterruptible power supplies, and renewable energy systems. An innovative DC-DC converter is suggested in this article. Designing a new, high-gain DC-DC converter scheme known as a double-switch SEPIC-buck converter (DSSB) is possible after making some adjustments to the SEPIC converter that is currently known in accordance with accepted techniques. The output voltage magnitude of the proposed converter is either larger than or less than the input voltage magnitude and is the same sign as the input voltage. According to the theoretical and analytical study that has been supported by the real-world application, high voltage gain, low switching stress, and low inductor current ripple are the main characteristics of the proposed DSSB converter. The related small-signal model was also used to build the closed-loop system. The frequency response and output voltage behavior were investigated when the input source voltage abruptly changed as a step function. Based on the comparison study with other DC-DC converters, the DSSB converter outperforms currently known DC-DC converters such as Buck, SEPIC, Boost, Buck-Boost, and other SEPIC converter topologies in terms of voltage gain, harmonic content, normalized current ripple, dynamic performance, and efficiency. Additionally, the frequency response and control of the proposed converter using an alternate current (AC), small-signal, analysis-based, current-mode control technique are both provided. Thus, the DSSB is regarded as safe in overcurrent situations because of the small-signal analysis with the current control strategy. As a result of the verification of the proposed control technique, the resistance to changes in the DSSB parameters, improved dynamic performance, and higher control accuracy are further advantages of current-mode control based on small-signal analysis over other control approaches (PI controllers). Finally, the experimental and simulation results from Simplorer 7 and MATLAB/Simulink are used to validate the findings of the analytical and comparative investigation.

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Section: Simulation Resultsmentioning

confidence: 99%

“…For frequencies below 1 MHz, the gain roll-off rate (slope) is −40 db/decade, which is equal to a rate of −24 db/octave. From the current loop plot, the converter may behave as an underdamped system with two real negative poles and one pole at the origin, which can be observed from the current gain transfer function [33,34]. Figure 16 depicts the dynamic response of the DSSB input/output voltage and current waveforms for a variable step response of the input source voltage using the parameters listed in Table 6.…”

Section: Simulation Resultsmentioning

confidence: 99%

A New Double-Switch SEPIC-Buck Topology for Renewable Energy Applications

Emar,

Issa,

Kanaker

et al. 2024

Energies

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“…Generally, lots of low-power equipment such as LED lighting, computers, gadgets, appliances, medical devices, energy harvesting, UPS, portable devices, and data centres need DC power. For this purpose, single-input multi-output (SIMO) DC-DC structures are an effective way to feed several DC loads under higher power density and compact design [5,6].…”

Section: Introductionmentioning

confidence: 99%

A new soft‐switching high gain DC/DC converter with bipolar outputs

Hasanpour,

Siwakoti,

Blaabjerg

2023

IET Power Electronics

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This paper introduces a new single‐input multi‐output step‐up DC/DC converter with soft‐switching performance and low input current for renewable energy applications. The proposed topology uses a three‐winding coupled‐inductor (TWCI) and voltage multiplier circuits to achieve high voltage gains. The bipolar output voltages of the proposed converter can be varied independently by tuning the turns ratios of the TWCI. Due to the semi‐trans‐inverse specification of the suggested topology, high voltage gains can be obtained under a lower number of turns ratio in the magnetic device. Furthermore, a regenerative passive clamp technique mitigates the voltage stress on the single power switch. Additionally, the power dissipations are further reduced by considering a resonant tank in the circuit. In the converter, the parasitic leakage inductances of the TWCI windings help to provide the soft‐switching conditions for the switch and also to eliminate the reverse‐recovery loss for all converter diodes. The operating mode of the presented converter has been introduced and the steady state, along with the main operating equations have also been derived. Finally, the theoretical analysis is verified by a sample prototype 235 W at the input voltage 25 V and outputs of 200 V and −200 V.

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