Application of newly developed Epoxy-Anhydride VPI resin for high voltage motors and generators

Yu, Xiaoquan; Wang, Wen; Tao, Chunchu; Li, Cuicui; He, Shaobo; Chen, William

doi:10.1109/icacact.2014.7223557

Cited by 5 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They consist of main ground wall insulation, end winding insulation, and turn to turn insulation. In these larger machines there can be various materials and resins employed to make up the electrical insulation layer or ground wall insulation as well as the turn-to-turn insulation [31,32], but the application of different materials, different layer thicknesses, order of insulation [30] and various epoxy resins is always a compromise between electrical insulation properties, thermal conductivity and mechanical strength. Thermal cycling damages this insulation and damaged insulation is very susceptible to moisture absorption.…”

Section: The Effects Of Moisture On Insulationmentioning

confidence: 99%

Research in Life Extension of Electrical Motors by Controlling the Impact of the Environment through Employing Peltier Effect

et al. 2022

View full text Add to dashboard Cite

This paper explores the application of thermoelectric cooler/heater (TEC) modules (Peltier heat pumps devices) to control core and winding temperatures, aiming to reduce the effects of thermal cycling and moisture issues that affect the life of electrical machines. Electrical windings in a motor will fail for a variety of reasons, and a major contributor to adverse effects of a motor’s life is humidity. Due to thermal cycling, air containing moisture is drawn into a motor through a variety of access points such as terminal boxes, bearings, end covers and mounting systems. Even spare or replacement motors specially stored in heated spare equipment stores suffer from moisture ingress because of normal daily temperature changes. The better a machine can be kept warm, the less it is affected by moisture and the effects of mechanical stresses from cycling temperatures. A series of experiments were conducted, whereby a TEC was attached to a section of motor core and was set up to pump heat into the core segment. The thermal properties of the core material and the capacity to control winding temperatures along the core in specific locations and over time was measured. The results of this research demonstrate that the temperature of the motor can be tightly controlled, thus enabling the reduction of the effects of moisture, and reducing core and winding temperature differences. This has a positive influence in reducing the thermal stresses, which will result in improved insulation life and machine reliability.

show abstract

Section: The Effects Of Moisture On Insulationmentioning

confidence: 99%

Research in Life Extension of Electrical Motors by Controlling the Impact of the Environment through Employing Peltier Effect

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Furthermore, both epoxy and polyester resins found relevant application in the impregnation industry due to their capacity to provide mechanical and electrical support to windings [ 20 , 21 , 22 , 23 , 24 ]. Their excellent electrical insulation properties have allowed the development of various epoxy-based [ 20 , 21 , 24 ] and polyester-based systems [ 20 , 22 , 23 ] for Vacuum Pressure Impregnation (VPI) insulation processing of generators, motors, transformers, and other electrical equipment.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Electrical Characterization of Polyester Resins Suitable for Electric Motor Insulation

et al. 2023

View full text Add to dashboard Cite

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 10−10 S/m, a relative permittivity around 3, and a loss tangent value lower than 0.02, which appears almost stable in the analyzed frequency range. These values confirm their usefulness as impregnating resins in secondary insulation material applications.

show abstract

Correlation between Voltage Endurance and Dielectric Loss Tangent/Partial Discharge for Stator Coils of HV Motors

Ren

Jiang²,

et al. 2020

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

View full text Add to dashboard Cite

Application of newly developed Epoxy-Anhydride VPI resin for high voltage motors and generators

Cited by 5 publications

References 2 publications

Research in Life Extension of Electrical Motors by Controlling the Impact of the Environment through Employing Peltier Effect

Research in Life Extension of Electrical Motors by Controlling the Impact of the Environment through Employing Peltier Effect

Thermal and Electrical Characterization of Polyester Resins Suitable for Electric Motor Insulation

Correlation between Voltage Endurance and Dielectric Loss Tangent/Partial Discharge for Stator Coils of HV Motors

Contact Info

Product

Resources

About