New Trends in Reliability and Lifetime Improvement in Power-Electronic-Controlled Machines and Devices

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Electrical Machines and Drives".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 892

Special Issue Editors


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Guest Editor
Center for Advanced Power Systems, Florida State University, Tallahassee, FL 32310, USA
Interests: partial discharge; insulation system; surface discharge; power electronics; extrinsic aging; triple point; dielectric surface; field profile; repetition rate; corona discharge; rise time; time constant; high voltage; internal defects; space charge; tangential field; transient voltage; voltage waveforms; atmospheric pressure; DC voltage; electrode; harmfulness; maximum field; printed circuit board; probability of failure
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Guest Editor Assistant
Center for Advanced Power Systems, Florida State University, Tallahassee, FL 32310, USA
Interests: high voltage testing under different voltage profiles: AC (with harmonics), DC (with ripple), and PWM; electrical insulation systems for electrified transportation and aerospace applications; condition monitoring; extrinsic aging and life modeling; partial discharge detection and monitoring; electric field distribution; electrical breakdown; surface erosion; surface flashover; space charge measurements; pulsed electroacoustic modeling (PEA) technique; power electronics; printed circuit boards; polymeric insulation; nanocomposites

Special Issue Information

Dear Colleagues:

The innovative and efficient design of electrical insulation in power-electronic-controlled machines and devices is critical for enhancing their reliability and extending their operational lifetime. The inclusion of power electronics into the power system environment results in repetitive voltage impulses, harmonics from switching systems, and slow/fast rising voltage transients. These factors are known to introduce additional electro-thermal stresses, which results in significantly accelerating the aging process of electrical insulation. This accelerated aging occurs at a rate that is unpredictable based on existing life models. As a result, the traditional methods of predicting insulation lifespan and reliability are becoming less effective, necessitating new approaches and advanced diagnostic techniques to manage and mitigate these emerging stresses.

Worldwide, researchers are invited to submit their original work relevant to the improvement of reliability and performance of power-electronic-controlled devices in electrical grids, which includes, but is not limited to, the implementation of advanced insulation materials and technologies, establishing robust criteria for aging evaluation and predicting insulation lifespan, condition monitoring of insulation systems, partial discharges, and fault detection in electric machines such as rotating machines and transformers.

Prof. Dr. Gian Carlo Montanari
Guest Editor

Dr. Sukesh Babu Myneni
Guest Editor Assistant

Manuscript Submission Information

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Keywords

  • electric machines
  • machine insulation
  • partial discharges
  • power electronics
  • lifetime improvement
  • reliability

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Published Papers (1 paper)

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Research

19 pages, 9423 KiB  
Article
A Common DC Bus Circulating Current Suppression Method for Motor Emulators of New Energy Vehicles
by Haonan Sun, Dafang Wang, Qi Li and Yingkang Qin
Machines 2025, 13(1), 51; https://doi.org/10.3390/machines13010051 - 13 Jan 2025
Viewed by 401
Abstract
In contrast to the conventional topology, wherein the Device Under Test (DUT) controller and the electric motor emulator (EME) are powered by the DC (Direct Current) voltage source independently, the common DC bus topology necessitates a single power supply. This reduces the cost [...] Read more.
In contrast to the conventional topology, wherein the Device Under Test (DUT) controller and the electric motor emulator (EME) are powered by the DC (Direct Current) voltage source independently, the common DC bus topology necessitates a single power supply. This reduces the cost and complexity of the motor emulator system, making it more favorable for large-scale industrial applications. However, this topology introduces significant circulating current issues in the system. A common DC bus circulating current suppression method is proposed in this paper for the motor emulator. First, the mechanism of zero-sequence circulating current generation in the common DC bus topology is analyzed and the expression for the system’s zero-sequence voltage difference is derived. Then, a control method based on a Hybrid PWM (Pulse Width Modulation) strategy that unifies SPWM (SIN Pulse Width Modulation) and SVPWM (Space Vector Pulse Width Modulation) is proposed, which has been shown to be effective in suppressing the zero-sequence circulating current in a motor emulator system with a common DC bus topology. The proposed control method has been experimentally validated using a motor emulator system. Full article
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