Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems
Electrified transportation is calling for insulation design criteria that is adequate to provide elevated levels of power density, power dynamics and reliability. Increasing voltage levels are expected to cause accelerated intrinsic and extrinsic aging effects which will not be easily predictable at...
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2025-05-01
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| author | Gian Carlo Montanari Sukesh Babu Myneni |
| author_facet | Gian Carlo Montanari Sukesh Babu Myneni |
| author_sort | Gian Carlo Montanari |
| collection | DOAJ |
| description | Electrified transportation is calling for insulation design criteria that is adequate to provide elevated levels of power density, power dynamics and reliability. Increasing voltage levels are expected to cause accelerated intrinsic and extrinsic aging effects which will not be easily predictable at the design stage due to a lack of suitable modeling. Designing reliable insulation systems would require finding solutions able to control accelerated aging due to an unpredictable increase of intrinsic stresses and the onset of extrinsic stresses as partial discharges. This paper proposes the concept of reliability redundancy for the insulation design of aerospace electrical asset components, which is also validated at lower-than-standard atmospheric pressure. The principle is that extrinsic-aging-free design might be achieved upon determining the aging stress or abnormal service stresses distribution and being sure that aging will not generate conditions that can incept extrinsic aging (partial discharges) during operation life. However, such information is never, in practice, fully available to insulation system designers. Hence, especially in critical applications such as electrified aircraft, aerospace, and combat ships a further level of reliability should be added to a partial-discharge-free design, which can consist of the use of corona-resistant materials and/or of life models able to consider the accelerated aging effect of partial discharges (or any other type of extrinsic-accelerated aging factor). Innovative life modeling considering both extrinsic and intrinsic aging stresses, insulating material testing to estimate model parameters, and a metric for quantifying the extent of corona (or partial discharge) resistance can lead to establishing feasibility and limit conditions for optimized or fully reliability-redundant design. It is shown in the paper that if an extrinsic-aging-free design is not feasible, and it is therefore replaced by a redundant design, a further level of reliability redundancy can be provided by effective condition monitoring plans. |
| format | Article |
| id | doaj-art-08e1f5610d44439a8ef2ee0edc27bb97 |
| institution | DOAJ |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj-art-08e1f5610d44439a8ef2ee0edc27bb972025-08-20T02:59:11ZengMDPI AGEnergies1996-10732025-05-01189237110.3390/en18092371Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation SystemsGian Carlo Montanari0Sukesh Babu Myneni1Center for Advanced Power Systems (CAPS), Florida State University, Tallahassee, FL 32310, USACenter for Advanced Power Systems (CAPS), Florida State University, Tallahassee, FL 32310, USAElectrified transportation is calling for insulation design criteria that is adequate to provide elevated levels of power density, power dynamics and reliability. Increasing voltage levels are expected to cause accelerated intrinsic and extrinsic aging effects which will not be easily predictable at the design stage due to a lack of suitable modeling. Designing reliable insulation systems would require finding solutions able to control accelerated aging due to an unpredictable increase of intrinsic stresses and the onset of extrinsic stresses as partial discharges. This paper proposes the concept of reliability redundancy for the insulation design of aerospace electrical asset components, which is also validated at lower-than-standard atmospheric pressure. The principle is that extrinsic-aging-free design might be achieved upon determining the aging stress or abnormal service stresses distribution and being sure that aging will not generate conditions that can incept extrinsic aging (partial discharges) during operation life. However, such information is never, in practice, fully available to insulation system designers. Hence, especially in critical applications such as electrified aircraft, aerospace, and combat ships a further level of reliability should be added to a partial-discharge-free design, which can consist of the use of corona-resistant materials and/or of life models able to consider the accelerated aging effect of partial discharges (or any other type of extrinsic-accelerated aging factor). Innovative life modeling considering both extrinsic and intrinsic aging stresses, insulating material testing to estimate model parameters, and a metric for quantifying the extent of corona (or partial discharge) resistance can lead to establishing feasibility and limit conditions for optimized or fully reliability-redundant design. It is shown in the paper that if an extrinsic-aging-free design is not feasible, and it is therefore replaced by a redundant design, a further level of reliability redundancy can be provided by effective condition monitoring plans.https://www.mdpi.com/1996-1073/18/9/2371electrified transportationaerospaceaircraftshipspartial dischargesaccelerated life tests |
| spellingShingle | Gian Carlo Montanari Sukesh Babu Myneni Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems Energies electrified transportation aerospace aircraft ships partial discharges accelerated life tests |
| title | Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems |
| title_full | Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems |
| title_fullStr | Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems |
| title_full_unstemmed | Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems |
| title_short | Operation at Reduced Atmospheric Pressure and Concept of Reliability Redundancy for Optimized Design of Insulation Systems |
| title_sort | operation at reduced atmospheric pressure and concept of reliability redundancy for optimized design of insulation systems |
| topic | electrified transportation aerospace aircraft ships partial discharges accelerated life tests |
| url | https://www.mdpi.com/1996-1073/18/9/2371 |
| work_keys_str_mv | AT giancarlomontanari operationatreducedatmosphericpressureandconceptofreliabilityredundancyforoptimizeddesignofinsulationsystems AT sukeshbabumyneni operationatreducedatmosphericpressureandconceptofreliabilityredundancyforoptimizeddesignofinsulationsystems |