Novel Bipolar-Type Direct AC–AC Converter Topology Based on Non-Differential AC Choppers

Liu, Chuang; Guo, Dongbo; Shan, Renzhong; Cai, Guowei; Ge, Weichun; Huang, Zhe-zhu; Wang, Yibo; Zhang, Hanwen; Wang, Peng

doi:10.1109/tpel.2018.2890581

Cited by 35 publications

(16 citation statements)

References 26 publications

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“…At this modulation modes, the proposed converter has the maximum controllable degree of freedom. Proposed in [13] ( Fig. 1(c…”

Section: A Operation Process In In-phasementioning

confidence: 99%

“…In the formula above, ΔiL=2kiIL and IL represent current ripple and average value of iL, respectively. For the converter, we can get formulas (13) and (14).…”

Section: ) When D1+d2<1mentioning

confidence: 99%

“…In order to fully mitigate unwanted effects of supply voltage, mainly voltage sags and swells, various types of devices have been developed in recent literature. These devices are primarily referred to as voltage sag/sell compensators [3]- [4], ac voltage regulators [5], ac stabilizers [6], ac voltage sag supporters [7], voltage conditioners [8], dynamic voltage restorers (DVR) [9]- [12], distributed flexible voltage conditioner (DFVC) [13], etc. Either of these devices can be designed with a voltage source inverter (VSI) or a direct PWM ac-ac converter.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it also needs to adopt a safe commutation strategy to address commutation problems [27]. Recently, a novel bipolar-type direct ac-ac converter is presented in [13], as shown in Fig. 2(c).…”

Section: Introductionmentioning

confidence: 99%

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An Improved Bipolar-Type AC–AC Converter Topology Based on Nondifferential Dual-Buck PWM AC Choppers

Wang

Cai

et al. 2021

IEEE Trans. Power Electron.

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A novel single-phase pulse width modulation (PWM) direct ac-ac converter based on two-level non-differential dual-buck ac chopper legs with inverting and non-inverting operations is first proposed in this paper. It has the ability to resolve both voltage sag and swell problems at the same time when used as distributed flexible voltage conditioner (DFVC). Compared to the traditional ac-ac converter, it has much enhanced system reliability thanks to no shoot-through problems even when all switches of each ac chopper legs are turned on, and therefore, the PWM dead-time is not needed leading to improving the utilization of the duty cycles. Only half of the switches in the proposed converter are switched at high frequency during a switching period at most, which significantly reduces the total switching loss. In particularly, the converter has two greatest advantages that it retains the common sharing ground of the input and output and has the same buck/boost operation process for non-inverting and inverting modes. In order to fully testify the performance of the proposed converter, a 500W experimental prototype is built and tested at different conditions.

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“…At this modulation modes, the proposed converter has the maximum controllable degree of freedom. Proposed in [13] ( Fig. 1(c…”

Section: A Operation Process In In-phasementioning

confidence: 99%

“…In the formula above, ΔiL=2kiIL and IL represent current ripple and average value of iL, respectively. For the converter, we can get formulas (13) and (14).…”

Section: ) When D1+d2<1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An Improved Bipolar-Type AC–AC Converter Topology Based on Nondifferential Dual-Buck PWM AC Choppers

Wang

Cai

et al. 2021

IEEE Trans. Power Electron.

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“…A direct ac-ac power conversion (or matrix converter) is considered as a promising candidate for solving the technical problems of a conventional multi-stage ac-dc-ac power converter [7]. Three-phase to three-phase ac-ac converters [8]- [11], three-phase to single phase ac-ac converters [12]- [16], single-phase to single-phase ac-ac converters [17]- [22], and three-phase to dc converters [23]- [25] have been proposed for industrial and industrious applications such as battery chargers, ac motor drives, IH and IPT systems.…”

Section: Introductionmentioning

confidence: 99%

Three-Phase to Single-Phase Multiresonant Direct AC–AC Converter for Metal Hardening High-Frequency Induction Heating Applications

Kawashima

Mishima

Ide³

2021

IEEE Trans. Power Electron.

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A new multi-resonant three-phase utility frequency ac (UFAC) to high-frequency ac (HFAC) direct power converter for the industrial metal hardening induction heating (IH) applications is presented in this paper. The proposed ac-ac converter features direct frequency conversion with the wide range of soft switching by means of the minimized numbers of bidirectional switches. The conducting current of bidirectional switches can be reduced effectively owing to the multi-resonant tank while keeping a high power in the IH load. Accordingly, the practical power converter with simplicity, cost-effectiveness, and high efficiency can be realized on the basis of a simple pulse frequency modulation. The circuit topology and operating principle of the proposed converter are described, after which the design procedure of the multi-resonant tank and switching frequency is presented. The performances on the soft switching and the steady-state pulse frequency modulation (PFM) characteristics of the ac-ac converter are evaluated in experiment with the 1.7 kW / 85 kHz-90 kHz prototype. Finally, the feasibility of the proposed ac-ac converter is evaluated from a practical view point. Index Terms-Direct ac-ac converter, high frequency induction heating (IH), pulse frequency modulation (PFM), series-parallel resonance, zero current soft switching (ZCS), zero voltage soft switching (ZVS).

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A novel control method for enhanced performance of single‐phase matrix converters

Al‐Dori,

Vural

2023

Circuit Theory & Apps

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The conventional topology of direct single‐to‐single‐phase matrix converter (SSMC) is widely adopted in industrial and power system‐related applications owing to its desired features. Current control methods in the literature either limit the voltage transfer ratio (VTR) or prohibit their utilization to drive inductive (RL) loads. In this study, we propose a novel control method that overcomes these limitations by enabling the SSMC to achieve relatively high VTRs while driving RL loads with negligible output voltage spikes and without current commutation problems. Further, the proposed control method improves the overall performance by reducing output voltage and source input current total harmonic distortion (THD) and offering soft‐switching at the commutation instances. The rigidity of the proposed control method over the counterpart methods in the literature is verified through simulation and experimental case studies over a wide range of synthesized output frequencies and modulation indexes. A 530‐W laboratory prototype is built for the experimental study. Results demonstrated the ability of the proposed method in enabling the SSMC to drive an RL load without current commutation issues and with mitigated output voltage spikes while achieving relatively high VTRs and suppressing the output voltage and source input current THD.

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Novel Bipolar-Type Direct AC–AC Converter Topology Based on Non-Differential AC Choppers

Cited by 35 publications

References 26 publications

An Improved Bipolar-Type AC–AC Converter Topology Based on Nondifferential Dual-Buck PWM AC Choppers

An Improved Bipolar-Type AC–AC Converter Topology Based on Nondifferential Dual-Buck PWM AC Choppers

Three-Phase to Single-Phase Multiresonant Direct AC–AC Converter for Metal Hardening High-Frequency Induction Heating Applications

A novel control method for enhanced performance of single‐phase matrix converters

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