Single-phase PWM AC/AC semiconductor transformer topologies and applications

Fedyczak, Z.; Strzelecki, Ryszard; Benysek, G.

doi:10.1109/psec.2002.1022594

Cited by 43 publications

(26 citation statements)

References 7 publications

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“…However, these converters usually need an overall higher number of switches and offer poor The main objective of the converter is to reduce the line voltage in a controllable fashion, thus boost-type topologies are not considered. Nearly any DC-DC topology can be converted into an AC chopper [4]. They offer similar strengths and weaknesses as the DC-DC designs from which they originate.…”

Section: Amentioning

confidence: 99%

Comparison of PWM AC chopper topologies

Hagemeyer

Solanki

Fröhleke

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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In this paper, a commonly reported single-phase four-switch AC chopper topology is compared with a six-switch topology in terms of the total harmonic distortion (THD) of the input current, power factor (PF), commutation behavior, robustness and efficiency. Working principles of both topologies are presented along with simulation results. Based on a comparison of the findings, the four-switch topology is found to be better choice for the given application. Thus, the implementation of a four-switch topology is carried out at a power level of 10 kW. Experimental evaluation is carried out in order to verify the suitability of the circuit for the intended application. The experimental setup validates the findings of the simulations. Thus, the proposed approach is a practical way to improve input current THD and PF compared to thyristor choppers.

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Section: Amentioning

confidence: 99%

Comparison of PWM AC chopper topologies

Hagemeyer

Solanki

Fröhleke

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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“…Furthermore, when the charging current calculated by (8) decreases to the value no more than zero, n will reach its upper limit denoted by ne. Substituting (6), (8), and (9) into (7), the energy provided by the supply in the nth switching cycle can be written as follows:…”

Section: Introductionmentioning

confidence: 99%

The Active Voltage Quality Regulator with the DC-Link Capacitor Boosting Circuit

Shyamsunder¹,

Reddy²

2017

IJERT

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Abstract-Voltage sags have always been a huge threat to sensitive industrial and commercial electrical consumers; and deep sags with long duration time are usually more intolerable. In this paper, a new topology of series-connected compensator is presented to mitigate long duration deep sags, and the compensation ability is highly improved with a unique shunt converter structure acting as a DC-Link capacitor boosting circuit that has been theoretically analyzed. Additionally, the proposed active voltage equality regulator is a cost effective solution for long duration sags that are lower than 50% of the nominal voltage as it is compared with the traditional dynamic voltage restorer. High operation efficiency is ensured by applying the dc-link voltage adaptive control method. Analysis, along with simulation and experimental results, is presented to verify the feasibility and effectiveness of the proposed topology.Keywords-Dynamic voltage restorer (DVR), dynamic sag correction, long duration deep sag, DC-Link capacitor boost circuit, seriesconnect compensator.

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“…However, recent research revealed evident drawbacks of the IS-based converters in terms of power density and efficiency [21][22][23].Split-source inverters (SPIs) [24,25] were proposed as another alternative solution. According to the literature, SPIs have less passive component counts accompanied by higher voltage and current stresses at lower voltage gains, and they do not have short circuit immunity.Several interesting single-stage buck-boost inverters were proposed in [26][27][28][29]. At the same time all of them did not find industrial application.…”

mentioning

confidence: 99%

“…Several interesting single-stage buck-boost inverters were proposed in [26][27][28][29]. At the same time all of them did not find industrial application.…”

mentioning

confidence: 99%

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

et al. 2019

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This paper describes a bidirectional twisted single-phase single-stage buck-boost dc-ac converter based on an output unfolding circuit. This solution is derived by the combination of an inverting buck-boost dc-dc converter and an unfolding circuit. The operation principle, component design guidelines, along with the control approach are presented. The zero-crossing distortion problem is discussed and solved by a simple approach. The simulation and experimental results confirm all theoretical statements. Loss distribution and achievable efficiency are analyzed. Finally, the pros and cons of the proposed solution, along with the most promising application field, are analyzed and discussed in the conclusion.Another application field of the dc-ac converter with wide input voltage regulation is battery storage. Lithium-ion batteries are targeted to become the most popular choice for on-grid and grid-off solar battery storage in the foreseeable future. Such types of batteries have a wide range of input voltage. A converter that accepts different storage elements is preferable.Several single-stage alternatives were presented as alternative solutions. Inverters with an active boost cell were described in [6][7][8][9]. These inverters provide very high boost of the input voltage but suffer from high current spikes in the semiconductors and passive elements. Impedance-source networks have been reported in many research papers as a promising single-stage solution. Z-source inverters (ZSIs) and quasi-Z-source inverters (qZSIs) were proposed for different applications. Existing solutions were reviewed in [10][11][12][13][14], and different relevant issues are addressed in [15][16][17][18][19][20]. However, recent research revealed evident drawbacks of the IS-based converters in terms of power density and efficiency [21][22][23].Split-source inverters (SPIs) [24,25] were proposed as another alternative solution. According to the literature, SPIs have less passive component counts accompanied by higher voltage and current stresses at lower voltage gains, and they do not have short circuit immunity.Several interesting single-stage buck-boost inverters were proposed in [26][27][28][29]. At the same time all of them did not find industrial application. For example, the solution [26] requires reverse-blocking IGBTs, while others are quite complex solutions.An Aalborg inverter ( Figure 1b) is proposed as an inverter that combines buck and boost functionality [30][31][32][33][34][35]. These solutions have two independent buck-boost stages that are responsible for output sinusoidal voltage generation. The main advantage of the proposed solution is in the minimum voltage drop of the filtering inductors in the power loop at any time. At the same time, this solution uses a double number of semiconductors and an inductor in the buck and boost stage, which is an obvious drawback. Another drawback consists in the two power sources utilization. A similar idea with double components is discussed in [36].The solution based on the input boost a...

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Single-phase PWM AC/AC semiconductor transformer topologies and applications

Cited by 43 publications

References 7 publications

Comparison of PWM AC chopper topologies

Comparison of PWM AC chopper topologies

The Active Voltage Quality Regulator with the DC-Link Capacitor Boosting Circuit

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

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