ArticlePolymers2023
Thermal and Electrical Characterization of Polyester Resins Suitable for Electric Motor Insulation.
Article in Polymers, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Effects of Prolonged Cryogenic Exposure on the Electrical Degradation of Stator Main Insulation in Wind Turbines.Materials (Basel, Switzerland) · 2026Article
- Preparation and Properties of Environmentally Friendly Carboxyl Graphene Oxide/Silicone Coatings.Materials (Basel, Switzerland) · 2025Article
- Chemical Recycling of Bio-Based Thermosetting Epoxy Composite Produced by Vacuum-Assisted Resin Infusion Process.Polymers · 2025Article
- Residual Stress Analysis at the Conductor-Insulator Interface During the Curing Process of Hair-Pin Motors.Polymers · 2024Article
- Synthesis and Characterization of Acrylic Resin/Kaolin Composites for Dielectric Applications.Polymers · 2024Article
- Article
- Development of a Cure Model for Unsaturated Polyester Resin Systems Based on Processing Conditions.Polymers · 2024Article
- A Novel Polyester Varnish Nanocomposites for Electrical Machines with Improved Thermal and Dielectric Properties Using Functionalized TiOMaterials (Basel, Switzerland) · 2023Article
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This paper undertakes the thermal and electrical characterization of three commercial unsaturated polyester imide resins (UPIR) to identify which among them could better perform the insulation function of electric motors (high-power induction motors fed by pulse-wide modulation (PWM) inverters). The process foreseen for the motor insulation using these resins is Vacuum Pressure Impregnation (VPI). The resin formulations were specially selected because they are one-component systems; hence, before the VPI process, they do not require mixing steps with external hardeners to activate the curing process. Furthermore, they are characterized by low viscosity and a thermal class higher than 180 °C and are Volatile Organic Compound (VOC)-free. Thermal investigations using Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC) techniques prove their excellent thermal resistance up to 320 °C. Moreover, impedance spectroscopy in the frequency range of 100 Hz-1 MHz was analyzed to compare the electromagnetic performance of the considered formulations. They manifest an electrical conductivity starting from 10
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