Polar Voltage Space Vectors of the Six-Phase Two-Level VSI

Iwaszkiewicz, Jan; Muc, Аdаm; Bielecka, Agata

doi:10.3390/en15082763

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…Therefore, this control method is rarely used in practice, although its weaknesses are diminished in multiphase inverters. An example of the six phase inverter with a 60-degree output voltage is presented in [20].…”

Section: Introductionmentioning

confidence: 99%

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter

Muc¹,

Iwaszkiewicz²

2023

RE&PQJ

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The paper presents an inverter based on the orthogonal space vectors theory (OVT inverter) and its performance. The OVT inverter consists of two constituent twolevel 3-phase inverters: the main inverter (MI) and the auxiliary one (AI). The MI is controlled in a simple way to generate the stepped output voltage and the AI works as an active filter limiting the higher harmonics in the OVT output voltage. The filtering process is formed by the use of the orthogonal space vector theory. The output voltage of the OVT inverter takes the shape of a stepped voltage comparable to the voltage generated by multilevel inverters. The AI operates as a very effective active power filter (APF) of the OVT inverter output voltage. The AI power is significantly lower in comparison to the MI power nevertheless its switching frequency affects the OVT performance. The article describes studies in which the impact of changes in the switching frequency filter inverter on the operation of the orthogonal inverter and the output voltage THD. Increasing the filter inverter switching frequency improved performance and reduced the transformer size, which acts as a summing node.

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Section: Introductionmentioning

confidence: 99%

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter

Muc¹,

Iwaszkiewicz²

2023

RE&PQJ

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Unmanned Electric Tugboat Formation Multi-Agent Energy-Aware Control System Concept

Koznowski

Łebkowski

2022

Energies

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The topic of reducing exhaust gas emissions from internal combustion engines in the areas of port and coastal waters is in line with the assumptions of the climate policy. The publication presents a proposal to reduce the energy associated with the movement of port vessels through the use of a specific pattern (shape and size) of their movement. In addition to controlling the formation of tugboats, the authors propose the use of a multi-agent system offering elements of autonomous control of the vessels, which adjusts the parameters of the formation depending on the tasks performed. The results of tests for four tugboats with a hull length of 32 m and a maximum speed of 13 knots, moving in formations of eight different configurations, were analyzed. Studies conducted on the basis of a simulated exit and return to port scenario at a distance of 11.4 nm showed the possibility of reducing energy consumption required for movement by 5.8% to even 57.6% for tugboats moving one after another, at a certain distance. In addition, in order to completely eliminate exhaust gas emissions from the engines, it is proposed to use tugboats with electric drive together with an appropriate energy storage charging infrastructure.

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Steady-State Vibration Level Measurement of the Five-Phase Induction Machine during Third Harmonic Injection or Open-Phase Faults

Muc

Morawiec²,

Wilczyński³

2023

Energies

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Multiphase electric machines are increasingly used in various industries and for electromobility. Complex systems have been developed for the control and powering of multiphase machines, which require verification. The quality of control and the power supply of electric machines is usually evaluated by analyzing various electrical parameters. On the other hand, taking into account the fact that a motor is an electrical-mechanical object, its full diagnostics should also include the analysis of vibration signals to verify the operation of the motor as a mechanical device. In this paper, a sensorless control algorithm was studied and applied to a 5-phase induction motor. Various scenarios were considered; in particular, the operation of the studied motor in the absence of one or two phases and in the case of the introduction of the third harmonic to increase the torque was analyzed. In the scenarios considered, the motor was connected to another machine and operated with no load as well as with a preset load. The results obtained were analyzed in the time and frequency domain and were related to the standards used.

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Polar Voltage Space Vectors of the Six-Phase Two-Level VSI

Cited by 3 publications

References 31 publications

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter

Performance of an OVT inverter reliant on the switching frequency of the filtering inverter

Unmanned Electric Tugboat Formation Multi-Agent Energy-Aware Control System Concept

Steady-State Vibration Level Measurement of the Five-Phase Induction Machine during Third Harmonic Injection or Open-Phase Faults

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