Testing of insulation systems with respect to high-frequency voltage stress

2002 ◽  
Vol 12 (5) ◽  
pp. 337-345 ◽  
Author(s):  
M. Paede ◽  
W. Pfeiffer ◽  
R. Plessow
Keyword(s):  
High Frequency ◽  
Voltage Stress ◽  
Insulation Systems

scholarly journals Degradation Monitoring of Insulation Systems Used in Low-Voltage Electromagnetic Coils under Thermal Loading Conditions from a Creep Point of View

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3696
Author(s):  
Kai Wang ◽  
Haifeng Guo ◽  
Aidong Xu ◽  
Michael Pecht
Keyword(s):  
Creep Deformation ◽  
High Frequency ◽  
Thermal Loading ◽  
Point Of View ◽  
Electromagnetic Coils ◽  
Degradation Monitoring ◽  
Insulation Degradation ◽  
Insulation Systems ◽  
Micro Level ◽  
Turn Insulation

Electromagnetic coils are a key component in a variety of systems and are widely used in many industries. Because their insulation usually fails suddenly and can have catastrophic effects, degradation monitoring of coil insulation systems plays a vital role in avoiding unexpected machine shutdown. The existing insulation degradation monitoring methods are based on assessing the change of coil high-frequency electrical parameter response, whereas the effects of the insulation failure mechanisms are not considered, which leads to inconsistency between experimental results. Therefore, this paper investigates degradation monitoring of coil insulation systems under thermal loading conditions from a creep point of view. Inter-turn insulation creep deformation is identified as a quantitative index to manifest insulation degradation changes at the micro level. A method is developed to map coil high-frequency electrical monitoring parameters to inter-turn insulation creep deformation in order to bridge the gap between the micro-level and macro-level changes during the incipient insulation degradation process. Thermally accelerated tests are performed to validate the developed method. The mapping method helps to determine the physical meaning of coil electrical monitoring parameters and presents opportunities for predictive maintenance of machines that incorporate electromagnetic coils.

scholarly journals A High-Frequency Resonant Inverter Topology With Low-Voltage Stress

2008 ◽  
Vol 23 (4) ◽  
pp. 1759-1771 ◽  
Author(s):  
Juan M. Rivas ◽  
Yehui Han ◽  
Olivia Leitermann ◽  
Anthony D. Sagneri ◽  
David J. Perreault
Keyword(s):  
High Frequency ◽  
Low Voltage ◽  
Resonant Inverter ◽  
Voltage Stress ◽  
Inverter Topology
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