A Control Strategy for Bidirectional Isolated 3-Phase Current-Fed Dual Active Bridge Converter

Lee, Dong-Min; Hyun, Seung-Wook; Kang, Jiwoo; Noh, Yign; Won, Chung-Yuen

doi:10.3390/electronics7100214

Cited by 6 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that in operation at the duty cycle range 1/3 ≤ D < 2/3, the maximum current ripple value of the proposed topology is 0.0083 occurs at D = 1/2, where this value is one‐third compared with Jin and Liu 23 and half value compared with Bal et al 51 While in operation at duty cycle range 2/3 ≤ D < 1, the current ripple of studied topology is higher than that of the converter in Bal et al 52 ; when the duty cycle is equal to 5/6, and the normalized current ripple is equal to 0.0083. Furthermore, the current ripple of the previously proposed converters in previous studies 26 , 51 is higher than that of the proposed topology, according to the values shown in Figure 12A. Also, the normalized current ripple cancellation of the proposed topology occurs when the duty cycle is 1/3 and 2/3, which means that the proposed topology has a better dynamic response and smaller size inductor.…”

Section: Mathematical Analyses and Fundamental Equationsmentioning

confidence: 82%

“…Moreover, there are two types of BDCs, which are nonisolated and isolated. Nonisolated TBDCs (NTBDCs) [27][28][29][30][31][32][33] configurations are simpler than isolated TBDCs (ITBDC) 22,23,[34][35][36] and can achieve better efficiency. However, galvanic isolation is required in many applications and mandatory by different national and international standards.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bidirectional isolated three‐phase dc‐dc converter using coupled inductor for dc microgrid applications

Kattel

Mayer

Possamai

et al. 2020

Circuit Theory & Apps

View full text Add to dashboard Cite

The main objective of this project is to study the analysis and design of an isolated three-phase bidirectional dc-dc converter connected to the dc microgrid system. The proposed topology achieves efficient power conversion with a wide input voltage range, continuous input current, and bidirectional operation. In forward mode operation, the topology acts as a three-phase push-pull converter to reach a step-up voltage conversion ratio (90 to 450 V). In backward mode operation, the converter acts as an interleaved flyback converter to provide a step-down voltage conversion ratio (450 to 90 V). Over and above that, in both operation senses, the dc voltage gain is presented. The main advantages of this topology are high-switching frequency, the three-phase transformer that provides galvanic isolation between the dc voltage link bus to the battery or ultra-capacitor storage, and input/output filters size reduction.Besides, a fewer number of power switches, the frequency of output voltage, and input current ripple are three times higher than the switching frequency.The three active switches are connected to the same reference, which simplifies the gate drive circuit. Ultimately, the theoretical analysis of the proposed topology is carefully confirmed with the experimental results of the 4 kW converter prototype. K E Y W O R D Sbidirectional dc-dc converter, coupled inductor, interleaved flyback, microgrid, push-pull converter, three-phase transformer

show abstract

Section: Mathematical Analyses and Fundamental Equationsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Bidirectional isolated three‐phase dc‐dc converter using coupled inductor for dc microgrid applications

Kattel

Mayer

Possamai

et al. 2020

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

“…3.2 is the circuit diagram [16] of the door mechanism. The L293D device is a quadruple high-current half-H driver designed to provide bidirectional drive currents [17] of up to 600-mA at voltages from 4.5 V to 36 V. It is designed to drive inductive loads [18] such as relays, solenoids, DC and bipolar stepping motors, as well as high-current/high-voltage loads in positive-supply applications. The microcontroller through its P2.2 and P2.3 sends input to the motor drive.…”

Section: Door Mechanismmentioning

confidence: 99%

Design and Implementation of Access Door Control with Mo-bile Alert

Nwogu

Eze

Okunbor

2020

IJET

View full text Add to dashboard Cite

The necessity for adequate security of lives and properties cannot be overemphasized. Tackling insecurity in an effective manner calls for active computer-based researches and solutions. Essentially a security system is designed to help detect intrusion and prevent unauthorized access. These security threats are tracked by installing various security access doors and alarm systems. Findings have shown that many access doors use either password or biometric form of authentication separately which are easily compromised. This paper presents a two level automated access control for door security with mobile alert system, powered by a 5V, 6000mAH battery. In addition a multi factor authentication using biometrics (fingerprint) and password was also used to enhance access control for this system. A mobile phone call alert and alarm system was uniquely included to this design to notify owners of the presence of an intruder when multiple attempts of incorrect login credentials are presented to the system over a short period of time. The program for the microcontroller was written in C language. This paper concluded that the use of multi factor authentication with mobile phone call alert will help improve the security for access doors used in banks, residential buildings, hospitals, military properties and other institutions and where confidentiality and restrictions are needed.

show abstract

“…This problem can be solved by increasing the duty ratio gradually from 0 up to 50% at the initial soft start-up operation of the DAB converter [28,29]. When the SC module is charged and discharged by a DAB converter, it initially performs a soft start-up operation to maintain a stable PWM switching [30]. Unlike lithium-ion batteries, the SC module has a large potential difference during charging and discharging.…”

Section: Introductionmentioning

confidence: 99%

Soft Start-Up Control Strategy for Dual Active Bridge Converter with a Supercapacitor

Kim

Jeong³

et al. 2020

Energies

View full text Add to dashboard Cite

Renewable energy needs are steadily on the rise. Bidirectional DC/DC converters are essential in charging and discharging various storage batteries, such as PV/ESS (photovoltaic/energy storage system). A dual active bridge (DAB) converter, in particular, transfers power in both directions by phase shift using a soiled state transformer (SST). To reduce switching inrush current in batteries under high voltages, a soft start-up is demonstrated during the initial switching operation. When a supercapacitor (SC) is used as a battery, the reverse power caused by the inrush current appears under high voltage at the DC-link side. This causes serious electrical damage to the PV/ESS’ boost converter and inverter. To suppress peak overshoot voltage and stabilize soft start-up transients, we propose a three-step soft start-up controller and algorithm for bidirectional DAB converter implementation at virtual ESS and UPS. The step-by-step control strategy by OLDC (open loop duty control), OLPSC (open loop phase shift control), and OLFC (open loop frequency control) provides a stable soft start-up operation. In the initial stage of the OLDC, the duty ratio is gradually increased by the PWM (Pulse width modulation) signal. In the middle stage, a phase difference is seen as per the voltage of the SC. The OLPSC is performed to reduce the phase difference. In the final stage, the OLFC is performed to smoothly control the small phase difference. The overshoot or inrush current is drastically suppressed toward the DC-link and SC module. Consequently, we demonstrate a proposed controller and algorithm with prototype 5 kW DAB converter.

show abstract

A Control Strategy for Bidirectional Isolated 3-Phase Current-Fed Dual Active Bridge Converter

Cited by 6 publications

References 23 publications

Bidirectional isolated three‐phase dc‐dc converter using coupled inductor for dc microgrid applications

Bidirectional isolated three‐phase dc‐dc converter using coupled inductor for dc microgrid applications

Design and Implementation of Access Door Control with Mo-bile Alert

Soft Start-Up Control Strategy for Dual Active Bridge Converter with a Supercapacitor

Contact Info

Product

Resources

About