Multi-Winding Transformer for 18-Pulse AC–DC Converter Fed 7-Level CHB-Inverter With Fundamental Switching Based VCIMD

Singh, Bhim; Kant, Piyush

doi:10.1109/ojies.2020.2965802

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…where X = A, B or C phases. The NP tapping by each phases are d XOt , d XOm and d XOb , and can be obtained from ( 16), ( 17) and (18).…”

Section: B All the Dc-link Capacitors Are Balanced To Their Nominal V...mentioning

confidence: 99%

“…But, it is worth noticing that splitting a DC-link into more levels provides the benefit of using low voltage switching devices. Techniques found in the literature [6]- [18] to solve the NP voltage balancing problem can be categorised as follows. (a) Creating the DC-link neutral points using isolated DC power supplies, in [6], [7], [18]:…”

Section: Introductionmentioning

confidence: 99%

“…Techniques found in the literature [6]- [18] to solve the NP voltage balancing problem can be categorised as follows. (a) Creating the DC-link neutral points using isolated DC power supplies, in [6], [7], [18]:…”

Section: Introductionmentioning

confidence: 99%

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A Nine-Level Inverter With Single DC-Link and Low-Voltage Capacitors as Stacked Voltage Sources With Capacitor Voltage Control Irrespective of Load Power Factor

Debnath

Gopakumar

Umanand

et al. 2022

IEEE Open J. Ind. Electron. Soc.

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This paper proposes a multilevel inverter topology with a single DC-link and series-connected capacitors as stacked voltage sources for multilevel voltage generation. The voltage deviation of a DC-link capacitor will occur whenever a phase terminal connects to the balanced neutral points (NPs: terminal joints of DC-link capacitors). On the contrary, if the voltage of a DC-link capacitor deviates from the nominal voltage, the same phase currents can be utilised to balance these neutral points. This new technique is being proposed for the first time in literature. Any voltage disturbance of the DC-link capacitors is balanced using the motor phase currents, irrespective of load power factor and modulation indices. For the balanced neutral points, whenever a phase connects to a neutral point, the other phase terminal tapping positions are varied on the DC-link to establish i A + i B + i C = 0 for that neutral point. The pole voltage level variation at motor phase terminals is undisturbed by adding extra cascaded H-bridges (CHBs) at each phase leg. The voltages of CHB capacitors are controlled conventionally by inverter pole voltage redundancies. The detailed experimental results for open-loop V/f and closed-loop field-oriented control on an induction motor are presented using a nine-level laboratory prototype.

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“…where X = A, B or C phases. The NP tapping by each phases are d XOt , d XOm and d XOb , and can be obtained from ( 16), ( 17) and (18).…”

Section: B All the Dc-link Capacitors Are Balanced To Their Nominal V...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Nine-Level Inverter With Single DC-Link and Low-Voltage Capacitors as Stacked Voltage Sources With Capacitor Voltage Control Irrespective of Load Power Factor

Debnath

Gopakumar

Umanand

et al. 2022

IEEE Open J. Ind. Electron. Soc.

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“…Since autotransformers of the same rating utilize less magnetic material. This will reduce the entire setup weight to at least 80% of its original weight, save energy and decreases the loss and dimensions yet again [36]. In this study, I introduce and design a forty-four pulse rectifier based on MPSA with a very desirable power rate, less complexity, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Multi-Phase Shifting Autotransformer Based Rectifier

Abdollahi

2020

IEEE Open J. Ind. Electron. Soc.

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In this paper, a thorough analysis is carried out in order to achieve an optimal design of a forty-four pulse rectifier. In this study, a novel Multi-phase Shifting Autotransformer (MPSA) is introduced, discussed, simulated and implemented to forty-four pulse rectifier with acceptable power rates. Accordingly, the main purpose of the paper is focused on the power kVA rating reduction for power quality applications. It provides a more economical solution to achieve harmonic mitigation in electric power systems as compared with other rectifiers. The simulation and experimental results show that the input current THD is less than 3% using the proposed topology. The results indicate a significant reduction in the total cost and volume of the proposed forty-four pulse configuration in comparison with similar configurations. Also, it is shown that the proposed converter rating is about 42% of the DC load power. INDEX TERMS Forty-four pulse rectifier, multi-phase shifting autotransformer (MPSA), total harmonic distortion (THD).

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