Reduction of Electrical Stresses on Low-voltage Induction Motor Insulation Systems through Remote-controlled Inverters

Martínez-Tarifa, Juan Manuel; Sanz-Feito, J.; Amarís, Hortensia

doi:10.1080/15325000801960515

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…where α is the scale parameter of v (P (v = α) = 0.6321) and β is the shape parameter, the higher this value is, the less dispersed the distribution is. In Table 2, Table 3 and Table 4 the scale (PDIV) and shape parameters are reported for the tests performed at 25ºC 3 , 110ºC and 150ºC, in addition with the testing environmental conditions 4 . In addition to the tables, the Weibull probability plot is shown in Figure 8 for the 25 ºC data recorded, to visually determine if the data comes from a Weibull distribution.…”

Section: Resultsmentioning

confidence: 99%

“…If the applied electric field equals the inception field in any analyzed volume, then, the PDIV has been reached. Due to the uneven voltage distribution through turns of these VSD motors, nearly the whole voltage will be applied to only a few enamel micrometers [4]. As the final goal of the experiment is to study the PDIV of turn-to-turn insulation, a twisted pair layout was chosen, because it is advised as one of the sample types for turn-to-turn insulation tests in the literature [16].…”

Section: Physics Of Partial Discharge Inception Voltagementioning

confidence: 99%

“…These measurements were performed in a laboratory with a controlled temperature around 25ºC 4. Notice that the humidity column does not appear inTable 3 and Table 4, because all the water has completely evaporated.…”

mentioning

confidence: 99%

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Uncertainty Sources in the Estimation of the Partial Discharge Inception Voltage in Turn-to-Turn Insulation Systems

Calle¹,

Martínez-Tarifa

Solanilla

et al. 2020

IEEE Access

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Partial discharges (PD) are one of the main causes of premature failure in low-voltage motors driven by variable-speed drives. The use of these control systems are being quite extended due to new applications, such as the more electric aircraft (MEA) or hybrid and electric vehicles, and this has pushed research towards appropriate designs of electric motors to avoid, as much as possible, the presence of PD within their windings. This paper presents a model to predict the partial discharge inception voltage (PDIV) in the insulation of low-voltage machines. A value for the secondary ionization coefficient based on a statistical study is also proposed. The deviations of the model are also studied by obtaining the uncertainty of the value of that coeficient and the predicted values of the PDIV for a set of wires. This uncertainty will be compared with other error sources such as generator harmonics and humidity. Finally, the tests are done for different temperatures extend the model applicability. INDEX TERMS Insulation design, inverter-fed machine, partial discharges, Paschen's Law, Temperature, Townsend's coefficients.

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Section: Resultsmentioning

confidence: 99%

Section: Physics Of Partial Discharge Inception Voltagementioning

confidence: 99%

See 1 more Smart Citation

Uncertainty Sources in the Estimation of the Partial Discharge Inception Voltage in Turn-to-Turn Insulation Systems

Calle¹,

Martínez-Tarifa

Solanilla

et al. 2020

IEEE Access

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show abstract

“…The optimization envelope can be differently stretched in each of the design freedom dimensions. Filters can be used to prevent voltage overshoot [56]. Use of multi-level inverters at the cost of added complexity reduces dV /dt and the associated electrical stress in the insulation [57], [58].…”

Section: A Scope Of Mechanisms Stresses and Aging Of The Insulationmentioning

confidence: 99%

Modeling of Insulation Paper Damage in the Assembly of a Solid Slot Winding

Stefe¹,

Jenko

2020

IEEE Access

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Tight assembly of stator windings with no insulation paper damage is a manufacturing challenge. We evaluate different sets of parts according to the following parameters: magnet wire thickness, stator slot smoothness, length of the straight magnet wire after the slot end, and type and amount of insulation cap at the end of the slot. These parameters have discrete values with small differences between them. The damage criterion is the decrease of the insulation paper breakdown voltage after assembly/disassembly of parts, assembled in a small set of designed experiments. Parameter values, i.e., levels at individual experiments are set by an orthogonal experiment matrix. Repetition of each experiment provides statistical significance. Data analysis shows that the additive model alone is not sufficient due to the high correlation of the parameters' influences. We extend the model to include interparameter influences, which we model by adding a virtual parameter. The extended additive model generates parameter values that do not degrade the insulation paper breakdown voltage within the manufacturing process. These values are verified by repetitions of the control experiment. INDEX TERMS Analysis of variance, breakdown voltage, design for experiments, design for manufacture, dielectrics and electrical insulation, extended additive model, insulation paper damage, insulation testing, interparameter influence, in-wheel motor reliability, matrices, metal-insulator structures, orthogonal matrix experiments, permanent magnet motors, stators.

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Fuzzy Logic-based Electrothermal Life Model for Inverter-fed Induction Motor Insulation

Arora¹,

Aware

Tutakne³

2015

Electric Power Components and Systems

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Reduction of Electrical Stresses on Low-voltage Induction Motor Insulation Systems through Remote-controlled Inverters

Cited by 5 publications

References 12 publications

Uncertainty Sources in the Estimation of the Partial Discharge Inception Voltage in Turn-to-Turn Insulation Systems

Uncertainty Sources in the Estimation of the Partial Discharge Inception Voltage in Turn-to-Turn Insulation Systems

Modeling of Insulation Paper Damage in the Assembly of a Solid Slot Winding

Fuzzy Logic-based Electrothermal Life Model for Inverter-fed Induction Motor Insulation

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