Effect of voltage and frequency cycling on the lifetime of enameled wires for low voltage inverter-fed motors

Pietrzak, Pawel; Maussion, Pascal; Malec, David; Picot, Antoine; Hamiti, Tahar; Benmamas, Loucif; Manfè, Philippe

doi:10.1109/ceidp50766.2021.9705459

Cited by 5 publications

(1 citation statement)

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“…Furthermore, in motor drive applications, the applied voltage and frequency are changeable during operation. In order to further investigate the influence of voltage and frequency, which is highly relevant to the occurrence of PD, a study conducted by [29] investigated the lifetime of enameled twisted pairs under conditions of cyclically changing voltage and frequency excitation. They found the difference of experiment results between this voltage source and equivalent constant stress is quite small (roughly <4%).…”

Section: Figure 6 Switching Pulses Propagation Through Cablementioning

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: Figure 6 Switching Pulses Propagation Through Cablementioning

confidence: 99%