Switched-mode PFC rectifier with high-frequency transformer link for high-power density single phase UPS

Hirachi, K.; Yoshitsugu, J.; Nishimura, Koki; Chibani, Ali; Nakaoka, Mutsuo

doi:10.1109/pesc.1997.616739

Cited by 29 publications

(11 citation statements)

References 7 publications

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“…Some alternatives for low output power applications (P o <500 W) are the use of single switch isolated DC-DC converters such as flyback, SEPIC and CUK topologies, mainly operating in discontinuous conduction mode (DCM) [4]. The continuous conduction mode (CCM) normally is considered for applications with output power higher than 500 W. A first solution is the replacement of the classical non-isolated boost converter by the current fed fullbridge converter [5]. However, this solution presents some limitations as the hard-switching commutation that reduces the efficiency.…”

Section: Preregulator Power Circuitmentioning

confidence: 99%

Double Modulation Applied to a High Power Factor Rectifier with High Frequency Transformer for Ups Application

Gules¹,

Alvarenga²,

Meier³

et al. 2017

Eletrônica de Potência

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Section: Preregulator Power Circuitmentioning

confidence: 99%

Double Modulation Applied to a High Power Factor Rectifier with High Frequency Transformer for Ups Application

Gules¹,

Alvarenga²,

Meier³

et al. 2017

Eletrônica de Potência

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“…Online UPS system is becoming an effective equipment to solve the concerns about the power quality and reliability [2], [3]. In [4] and [5], a kind of poor power factor UPS structure is proposed using rectifier and battery as the DC source of the UPS while a PFC is chosen to form the DC side in order to enhance UPS power factor performance in [6] and [7]. For the sake of smaller current and voltage stress and multi-output N functionality, structures based on dual active bridge (DAB) converter are presented in [8] and [9].…”

Section: Nomenclature K Pv_secmentioning

confidence: 99%

Modular Online Uninterruptible Power System Plug‘n’Play Control and Stability Analysis

Zhang

Coelho

Guerrero

et al. 2016

IEEE Trans. Ind. Electron.

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Abstract-in this paper, a plug'n'play control strategy proposed for modular online UPS system is presented, which allows to plug the UPS modules in or out randomly. This provides a lower difficulty for the maintenance of the whole system. A two level control scheme was proposed, including local controllers to achieve active and reactive power sharing and central controllers to maintain synchronization capability, which allows the online UPS modular system having faster dynamic performance according to the standard IEC 62040-3. A detailed small signal mathematical model was developed in order to analyze the proposed modular online UPS system. Experimental results and data are presented to validate the stability analysis and support the proposed plug'n'play control feasibility.Index Terms-modular online UPS system, phase control, stability analysis. NOMENCLATURE

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“…However, due to high dc-link voltage, several batteries are connected in a series arrangement, which reduces the reliability of the system. [9] 2 kVA 220 108 9 [10] 150 VA 120 48 4 [11] 2 kVA 110 180 15 [12] 3.3 kVA 220 120 10 Table 1 shows a comparison of the different high-frequency transformer-based UPS with series connected batteries. Series battery arrangement has major drawbacks and limitations in charging and discharging.…”

Section: Introductionmentioning

confidence: 99%

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

et al. 2017

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Uninterruptible power supplies (UPSs) are widely used to deliver reliable and high quality power to critical loads under all grid conditions. This paper proposes a high-frequency isolated online UPS system for low power applications. The proposed UPS consists of a single-stage AC-DC converter, boost DC-DC converter, and an inverter. The single-stage AC-DC converter provides galvanic isolation, input power factor correction, and continuous conduction of both input and output current. The low battery bank voltage is stepped up to high dc-link voltage by employing a high voltage gain boost converter, thus allows the reduction of battery bank to only 24 V parallel connected batteries. Operating batteries in parallel improves the battery performance and resolves the issues related to conventional battery banks that arrange the batteries in series combination. The inverter provides regulated output voltage to the load. A new cascaded slide mode (SM) and proportional-resonant (PR) control for the inverter has been proposed, which regulates the output voltage for both linear and non-linear loads. The controller shows excellent performance during load transients and step changes. Besides, the controller for boost converter and AC-DC converter is presented. Operating principle and experimental results of 1 kVA laboratory setup have been presented for the validation of proposed system.

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Switched-mode PFC rectifier with high-frequency transformer link for high-power density single phase UPS

Cited by 29 publications

References 7 publications

Double Modulation Applied to a High Power Factor Rectifier with High Frequency Transformer for Ups Application

Double Modulation Applied to a High Power Factor Rectifier with High Frequency Transformer for Ups Application

Modular Online Uninterruptible Power System Plug‘n’Play Control and Stability Analysis

A High-Frequency Isolated Online Uninterruptible Power Supply (UPS) System with Small Battery Bank for Low Power Applications

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