Analysis and Design of a New AC–DC Single-Stage Full-Bridge PWM Converter With Two Controllers

Das, Pritam; Pahlevaninezhad, Majid; Moschopoulos, Gerry

doi:10.1109/tie.2012.2227915

Cited by 64 publications

(51 citation statements)

References 44 publications

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“…A single-stage AC/DC converter has been proposed in [29]. The converter operates in continuous condition mode (CCM) and is designed for high power applications, but extra diodes have been used in the circuit which reduces the overall efficiency of the circuit.…”

Section: Ac-dc Convertermentioning

confidence: 99%

“…The response time of the system λ determines the dynamics and robustness of the system. It is clear from Equation (29), that a smaller value of λ leads to a slow response time, while higher λ values though increase the response time, but take a longer time to reach the sliding surface. Thus the optimal value for λ is equal to the switching frequency of the inverter.…”

Section: Inverter Controlmentioning

confidence: 99%

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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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Section: Ac-dc Convertermentioning

confidence: 99%

Section: Inverter Controlmentioning

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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“…For instance, a PF of 1 will result in the most efficient loading of the supply; on the other hand, a load with a PF of 0.5 will result in higher losses in the distribution system [8]. PF is the ratio between the real power and the apparent power drawn by an electrical load (see (4)). In an inductive load, such as a motor, active power performs the work and reactive power creates the electromagnetic field.…”

Section: Definition and Typr Of Powermentioning

confidence: 99%

An Active Power Factor Correction Technique for Bridgeless Boost AC-DC Converter

Lince¹

2017

IJRASET

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As most of the electronic appliances use DC power so improvement in AC-DC converter is always at large by the researchers. The factors of improvement of power quality are reduction in total harmonic distortion and improvement in power factor at input ac, and tight output dc regulation. In such context, the AC-DC boost converters have gained significant importance, especially when they are used in Continuous Conduction Mode (CCM). This work presents a bridgeless AC DC boost converter operating in CCM. The implementation of input current and output voltage controller is also discussed. Then a comparative analysis based on simulation results of bridgeless and bridge boost rectifier is presented. Bridgeless boost AC-DC converter has outperformed the conventional techniques due to lower conduction losses, lower THD of input current and improved input power factor. I. INTRODUCTIONRectification is a process in which electric power is applications as most of electronics appliances nowadays require DC power. Conventional AC-DC converters, such as Bridge rectifiers, have been developed for this purpose but there are few factors to be controlled in this regard. The Non sinusoidal current drawn at the input side results in lower distortion as well displacement factors. Commanding the line current to follow the line voltage in a sinusoidal manner can gives higher efficiency with improved power factor and lower THD. AC side power factor (PF) is needed to be improved along with lowering of Total Harmonic Distortion of input line current. Tight regulation of the output voltage even in the case of dynamic loads is also a stringent requirement of DC-DC converters. A controller that simultaneously controls both the input as well as the output parameters is the choice. To gain a high power factor, different power factor correction (PFC) techniques have been introduced which can be divided into two parts, passive and active. Passive techniques consist of passive components such as inductors and capacitors that are used as input filter to reduce line current harmonics. However, improvements are not significant and another drawback is the relatively large size of these passive elements. Moreover, these techniques may not be able to handle dynamic loads. On the other hand, active PFC technique is more efficient solution, having a combination of switches and passive elements. Due to presence of switches, controllers can be implemented on active techniques of PFC. At the cost of complexity, the controlled active techniques can increase Power factor and reduce THD in the input AC current. Along with it active techniques can also bring precise DC regulation for variable loads. The active PFC technique uses a diode bridge rectifier followed by a dc-dc converter and the bulk capacitor. By controlling the dc-dc converter, the input line current is commanded to follow the input line voltage and in this way Power Factor approaches to unity. For medium and high power applications boost dc-dc converter works better for power factor corr...

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“…Therefore, using a single-stage topology to realize the PFC, isolation and dc/dc conversion sounds more attractive. Several single-stage full-bridge topologies can be found in the literature [6]- [21]. Among them, voltage-fed full-bridge converters [13]- [21], which can operate with a constant frequency and do not have a voltage overshoot problem across the dc bus, have been widely studied.…”

Section: Introductionmentioning

confidence: 99%

“…Several single-stage full-bridge topologies can be found in the literature [6]- [21]. Among them, voltage-fed full-bridge converters [13]- [21], which can operate with a constant frequency and do not have a voltage overshoot problem across the dc bus, have been widely studied. In [13]- [20], two inherent duty ratios, the dc/dc stage duty ratio D o and the PFC cell duty ratio D i , are defined.…”

Section: Introductionmentioning

confidence: 99%

A Novel PCCM Voltage-Fed Single-Stage Power Factor Correction Full-Bridge Battery Charger

Zhang¹,

Lu²,

Qian³

et al. 2016

Journal of Power Electronics

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A novel pseudo-continuous conduction mode (PCCM) voltage-fed single-stage power factor correction (PFC) full-bridge battery charger is proposed in this paper. By connecting a freewheeling transistor in parallel with an input inductor, the PFC cell can operate in the PCCM with a constant duty ratio. Thus, the dc/dc stage can be designed using this constant duty ratio and the restriction on the duty ratio of the PFC cell is eliminated. As a result, the input current distortion is less and the dc bus voltage becomes controllable over the wide output power range of the battery charger. Moreover, the operation principle of the dc/dc stage is designed to be similar to that of a conventional phase-shifted full-bridge converter. Therefore, it is easy to implement. In this paper, the operation of the new converter is explained, and the design considerations of the controller and key parameters are presented. Simulation and experimental results obtained from a 1 kW prototype are given to confirm the operation of the proposed converter.

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Analysis and Design of a New AC–DC Single-Stage Full-Bridge PWM Converter With Two Controllers

Cited by 64 publications

References 44 publications

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

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

An Active Power Factor Correction Technique for Bridgeless Boost AC-DC Converter

A Novel PCCM Voltage-Fed Single-Stage Power Factor Correction Full-Bridge Battery Charger

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