Estimation of winding insulation resistance to the corona discharges

Leonov, Andrey; Redko, Vitaliy Vladimirovich; Soldatenko, Evgeniy Yurievich

doi:10.1088/1757-899x/66/1/012004

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Type 2 and type 6 wire insulation has the highest average time to break down. The difference in resistance to surface discharges of these enameled wires becomes visible at a test voltage level above 5 kV or after preliminary application of mechanical loads on samples (tensile samples, winding on a metal rod with a diameter equal to double the wire diameter) (Table 7) [4]. The results clearly show that under the action of surface discharges, type 6 wire retains its properties at a higher level.…”

Section: Experiments (Methodical Part)mentioning

confidence: 90%

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Providing a Minimum Defectiveness of Inter-Turn Insulation at the Manufacturing Stage and During the Exploitation

Leonov¹,

Supueva²

2022

REFFIT

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The reliability of a low-voltage asynchronous electric motor is primarily determined by the reliability of the stator winding insulation. Common reasons for the failure of the insulation system are the unsatisfactory quality of the enameled wires and electrical insulating materials used for imperfection and violation of the technological process of winding and insulating work, and the discrepancy between operating modes. In the vast majority of cases, failures occur due to damage to the inter-turn insulation as the weakest element. This causes the need to study the insulation system resistance to the formation of defects. The results of assessing the stability of the insulation of winding wires to defect formation are obtained, taking into account the features of the operational loads characteristic of frequency-controlled drives with pulse-width modulation of the output voltage and the influence of the inter-turn insulation defectiveness level on its reliability indicators is also studied. The authors have developed the measures to reduce the defectiveness of inter-turn insulation at the manufacturing stage and during operation. This will ensure a minimum level of insulation defects and increase the resource of asynchronous electric motors by reducing the number of failures.

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Section: Experiments (Methodical Part)mentioning

confidence: 90%

“…Despite many works devoted to improving the quality and increasing the reliability of these devices, operational statistics show that 20-25 % of installed electric motors undergo major repairs annually. Failure of electric motors occurs due to the loss of the insulation system during the exploitation [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Providing a Minimum Defectiveness of Inter-Turn Insulation at the Manufacturing Stage and During the Exploitation

Leonov¹,

Supueva²

2022

REFFIT

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“…The probability of occurrence of short circuit or an electric arch under action switching over-voltage in this case increases. Thus, in the selection of magnet wire it is important to define the stability of enamel insulation to occurrence of defects [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

The Comparison of Methods of Testing Enameled Wire to Mechanical Stress

Leonov

Supueva

2015

AMM

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This work presents the test results of the enameled winding wires, characterizing an insulation mechanical strength. The standard and original test methods were used. It should be noted that the existing standard test methods do not estimate enamel insulation resistance to the mechanical loads authentically. Note that the estimation of wire mechanical resistance can be done by the determination of the number of defects in the enamel insulation. The results of tests for wires with various types of insulation are presented.

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Feasibility of using T-shaped feedback in teraohmmeters

Yermoshin

Yakimov

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Estimation of winding insulation resistance to the corona discharges

Cited by 5 publications

References 3 publications

Providing a Minimum Defectiveness of Inter-Turn Insulation at the Manufacturing Stage and During the Exploitation

Providing a Minimum Defectiveness of Inter-Turn Insulation at the Manufacturing Stage and During the Exploitation

The Comparison of Methods of Testing Enameled Wire to Mechanical Stress

Feasibility of using T-shaped feedback in teraohmmeters

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