Induction motors thermal behaviour and life expectancy under non-ideal supply conditions

Souto, O. C. N.; Oliveira, José Carlos de; Neto, Luciano Martins

doi:10.1109/ichqp.2000.896848

Cited by 9 publications

(10 citation statements)

References 5 publications

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“…For example, a VUF = 3% leads to an increase in temperature of 20%, which can be translated into a lifetime reduction of about 82%, and, similarly, a HVF = 15% leads to a lifetime reduction of about 58%. In [21] similar estimations are made. However, significant discrepancies exist for both results.…”

Section: Lifetime Deratingmentioning

confidence: 71%

“…The distorted periodic waveform corresponds to the sum of different sine waves w ith different magnitude and phase, having frequencies that are multiples of power system frequency, commonly known as harmonics. This PQ problem, its causes and consequences are well known and described in several publications [4,[17][18][19][20][21] and standards (e.g. IEEE Std.…”

Section: A Voltage Distortionmentioning

confidence: 99%

“…In [18,[20][21] several experimental and/or simulated results for different IMs are presented. These results suggest an overderating associated with NEMA curves for small motors.…”

Section: A Voltage Distortionmentioning

confidence: 99%

“…In [14,21], simulations on combined effects are presented. In [7,9,11,14] more experimental results can be found on combined effects.…”

Section: Combined Effectsmentioning

confidence: 99%

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Impact of steady-state voltage supply anomalies on three-phase squirrel-cage induction motors

Ferreira

Almeida

Deprez

et al. 2007

2007 International Aegean Conference on Electrical Machines and Power Electronics

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In this paper, the consequences of steady-state voltage supply anomalies on the behavior, losses and operating limits of low-power, low-voltage, three-phase, squirrel-cage induction motors is presented. The study is mainly based on simulations and previously published works, but experimental results are also presented. The well-known motor derating curves proposed by NEMA are questioned. It is demonstrated that they are too general, and do not consider combined effects of voltage unbalance, magnitude deviation, and distortion. Additionally, the effects of ambient temperature and motor characteristics (e.g. rated power, frame type, rotor type and efficiency class) should also be considered. Another important issue discussed in this paper is the fact that voltage unbalance and voltage distortion definitions should be properly revised in order to eliminate ambiguities. A clear methodology to evaluate the impact of the referred power anomalies on motors is proposed. An artificial neural network-based approach for mathematical description of motor derating curves as a function of multiple variables is also proposed and validated. Several relevant considerations on motor simulation within power quality scope are presented.

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Section: Lifetime Deratingmentioning

confidence: 71%

Section: A Voltage Distortionmentioning

confidence: 99%

“…In [18,[20][21] several experimental and/or simulated results for different IMs are presented. These results suggest an overderating associated with NEMA curves for small motors.…”

Section: A Voltage Distortionmentioning

confidence: 99%

“…In [14,21], simulations on combined effects are presented. In [7,9,11,14] more experimental results can be found on combined effects.…”

Section: Combined Effectsmentioning

confidence: 99%

See 2 more Smart Citations

Impact of steady-state voltage supply anomalies on three-phase squirrel-cage induction motors

Ferreira

Almeida

Deprez

et al. 2007

2007 International Aegean Conference on Electrical Machines and Power Electronics

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“…En otros casos, la temperatura dentro de la máquina se considera uniforme y también se tratan los circuitos térmicos por separado [11]. En este trabajo se supone como en [1], que el calor del rotor fluye al ambiente a través del eje del motor y no hacia el estator, o sea, que el entrehierro constituye una barrera a la transferencia de calor entre el estator y el rotor y viceversa [12]. Debido a que la vida útil del motor depende de la vida del aislamiento del estator, el enfoque se centra en este último y no se determinan los parámetros del circuito térmico del rotor.…”

Section: Modelo Térmico Del Motor Asincrónicounclassified

Procedimiento para el cálculo de los parámetros de un modelo térmico simplificado del motor asincrónico

Sarduy

Felipe

Teyra

et al. 2011

Ingeniare. Rev. chil. ing.

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RESUMENEn este trabajo se presenta un método para estimar las conductancias y capacitancias de un modelo térmico simplificado del motor asincrónico, utilizando una técnica de baja invasividad. El procedimiento permite predecir el incremento de temperatura del estator del motor asincrónico, tanto para régimen dinámico como en condiciones de estabilidad térmica. Se basa en la estimación paramétrica mediante un modelo de referencia, utilizando como optimizador un algoritmo genético (AG). Se logra en definitiva obtener los parámetros del modelo térmico con un ensayo más sencillo que lo requerido por otros métodos experimentales complejos o cálculos analíticos basados en datos de diseño. El procedimiento propuesto se puede llevar a cabo en condiciones propias de la industria y resulta atractivo su empleo en el análisis de calentamiento de estas máquinas. El método se valida a partir de un estudio de caso reportado en la literatura y se aplica a un caso real en la industria, lográndose una buena precisión.Palabras clave: Modelo térmico, motor asincrónico, temperatura, estimación de parámetros, algoritmo genético. ABSTRACT In this paper, an asynchronous motor simplified thermal model method for conductances and capacitances estimation is presented. A low invasive

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An Alternative Methodology for Quantifying Voltage Unbalance Based on the Effects of the Temperatures and Efficiency of Induction Motors

Silva

Filho

2022

IEEE Access

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Many unbalanced voltage conditions, which produce different effects on electric equipment, are associated with the same voltage unbalance factor. This fact hinders the precise association between the values of this index and the effects of voltage unbalance. In the present study, an alternative methodology for quantifying voltage unbalance based on the effects of this phenomenon on the temperature and efficiency of three-phase induction motors is proposed. The application of the suggested methodology results in an index that contemplates the combined effects of the modules and angles of the positive and negative sequence voltages. Aiming to apply this methodology and evaluate its performance, we selected a comprehensive set of balanced and unbalanced voltage conditions and used it on a three-phase induction motor. The results show that the index obtained, when compared to the traditional voltage unbalance factors, reduces the uncertainties inherent to the quantification process of this phenomenon. In other words, it allows a better association between the values and effects of the voltage unbalance. For these reasons, this index is considered as a potential alternative that can be employed in industrial utilities and standards that deal with voltage unbalance.INDEX TERMS Efficiency, index to quantify voltage unbalance, induction motor, power quality, symmetrical components, temperature.

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Induction motors thermal behaviour and life expectancy under non-ideal supply conditions

Cited by 9 publications

References 5 publications

Impact of steady-state voltage supply anomalies on three-phase squirrel-cage induction motors

Impact of steady-state voltage supply anomalies on three-phase squirrel-cage induction motors

Procedimiento para el cálculo de los parámetros de un modelo térmico simplificado del motor asincrónico

An Alternative Methodology for Quantifying Voltage Unbalance Based on the Effects of the Temperatures and Efficiency of Induction Motors

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