A Short Review on Polymer Nanocomposites for Enameled Wires: Possibilities and Perspectives

Danikas, M. G.; Morsalin, S.

doi:10.48084/etasr.2678

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…The improvement was achieved by using composites with micro/nano fillers of inorganic materials. The insulation lifetime of nano-filled enamel wire is longer compared with conventional wire under PWM excitation [26,[82][83][84][85][86]. It was discovered in [82] that the dielectric strength of nano-filled enamel wire is twice that of conventional wire when they are excited by PWM waveform.…”

Section: Solutions For Premature Insulation Failurementioning

confidence: 99%

Motor Winding Insulation Degradation Under Repetitive Voltage Pulses

Yang,

Phung

2024

IEEE Access

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Variable speed drives (VSDs) are widely utilized to control motors such as pumps, compressors, fans, etc. However, the endurance of motor winding insulation under repetitive voltage pulse excitation is weakened, resulting in premature failure and shortening the expected operating life. This article reviews the literature of investigations spanning the last two decades on the problem. Researchers have focused on different aspects to explain this from a particular angle. The precise mechanism is complicated as a number of interacting factors contribute to premature insulation failure. Insulation degradation in motors can be attributed to thermal, mechanical, chemical, and electrical stress. It seems that space charge accumulation and partial discharge (PD) are the two main influences; the former can exacerbate the electric stress distribution whilst the latter promotes insulation deterioration.

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Section: Solutions For Premature Insulation Failurementioning

confidence: 99%

Motor Winding Insulation Degradation Under Repetitive Voltage Pulses

Yang,

Phung

2024

IEEE Access

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“…Polymers are promising materials that can be widely used in a variety of applications and low prices [1,2]. Polymethyl methacrylate (PMMA) is an example of polymer which has been used in various applications [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of the Flame Retardancy of PMMA-Graphene Composite Materials

Al-Jarrah,

Rbeht,

Al-Waqfi

et al. 2024

Eng. Technol. Appl. Sci. Res.

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In this paper, Polymethyl methacrylate (PMMA)-graphene nano-composites were prepared and tested with the use of a cone calorimeter. Graphene was added to PMMA in limited weight percentages to improve the flame retardancy of PMMA. Two samples of PMMA-graphene, namely 1 and 3 wt%, were investigated. The combustion properties of the tested samples of PMMA-graphene composites, mass loss rate, heat release rate, and time to ignition were measured and calculated. It was found that the peak heat release rate of PMMA-graphene composites reduced by 17% when 3 wt% graphene was added to pure PMMA. Adding graphene to PMMA improves the thermal stability of PMMA by reducing the time of ignition. Also, the presence of graphene enhanced the formation of a continuous carbonized layer at the surface of the burned PMMA.

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