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Related Concept Videos

Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

519
A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
519
Three-Phase Voltages01:30

Three-Phase Voltages

339
A three-phase generator produces three voltages that are equal in magnitude but have a phase difference of 120 degrees. This identical magnitude and equal phase separated voltages are known as the balanced voltages and help to minimize power loss while ensuring a steady delivery of energy to connected loads. As voltage sources in a three-phase system can be configured in a wye or a delta formation, the loads connected to these systems can also be arranged in either configuration. This...
339
Three-Winding Transformers01:19

Three-Winding Transformers

335
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
335
Three-Phase Circuits01:22

Three-Phase Circuits

543
AC power distribution systems have three categories: single-phase, two-phase, and three-phase systems. The single-phase circuit, common in residential settings, typically employs a two-wire system connecting a single AC source to various loads. These circuits support standard household appliances operating at 120 volts (V) and 240 V, such as lamps, televisions, and microwaves. The first generators, Niagara Falls hydro plant installed in 1895, were two-phase and designed by Nikola Tesla. The...
543
Power Distribution in Three-phase and Single Phase Circuits01:17

Power Distribution in Three-phase and Single Phase Circuits

441
Power distribution within electrical circuits is a foundational aspect of residential and industrial energy systems. While single-phase power is common in residential settings, three-phase power is the standard for industrial environments with heavy machinery. Each system is different and has advantages, and it's crucial to understand the underlying principles of power distribution and material efficiency.
Single-Phase Power Distribution:
Single-phase circuits are typical in household...
441
Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

859
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
859

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Correction: Kang et al. Fluid Flow to Electricity: Capturing Flow-Induced Vibrations with Micro-Electromechanical-System-Based Piezoelectric Energy Harvester. <i>Micromachines</i> 2024, <i>15</i>, 581.

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Experimental Investigation of the Hierarchical Control in DC Microgrids Using a Real-time Simulator
06:04

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Three-Phase Six-Level Multilevel Voltage Source Inverter: Modeling and Experimental Validation.

Sheikh Tanzim Meraj1, Nor Zaihar Yahaya1, Kamrul Hasan2

  • 1Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia.

Micromachines
|September 28, 2021
PubMed
Summary
This summary is machine-generated.

A novel three-phase, six-level multilevel inverter uses fewer components than traditional designs. This efficient inverter achieves high performance and low harmonics, meeting IEEE 1547 standards.

Keywords:
multilevel inverterpower electronicsstaircase modulationvector modulation

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Renewable Energy Systems

Background:

  • Conventional multilevel inverters often require numerous power components, increasing complexity and cost.
  • There is a continuous need for advanced inverter topologies that offer improved efficiency and reduced harmonic distortion.

Purpose of the Study:

  • To propose a novel three-phase, six-level multilevel inverter topology.
  • To demonstrate superior performance in terms of component count, efficiency, and harmonic reduction compared to existing solutions.

Main Methods:

  • The proposed inverter utilizes a twelve-switch three-phase bridge combined with a multilevel DC-link.
  • The multilevel DC-link is formed using single DC supply, half-bridge, and full-bridge cells.
  • A vector modulation technique is employed for generating desired output voltage waveforms.

Main Results:

  • The developed prototype inverter achieved a high efficiency of 97.59%, adhering to IEEE 1547 standards.
  • Current harmonics were significantly minimized to 5.8%.
  • The inverter demonstrated flexibility, capable of operating as a six-level or two-level inverter.

Conclusions:

  • The proposed multilevel inverter topology offers a more efficient and component-reduced alternative to conventional designs.
  • The experimental validation confirms the inverter's capability to meet stringent performance and harmonic requirements for power applications.