Prediction of windings temperature rise in induction motors supplied with distorted voltage

Gnaciński, Piotr

doi:10.1016/j.enconman.2007.07.023

Cited by 30 publications

(31 citation statements)

References 12 publications

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“…where u h is the voltage of a harmonic of the h th order, related to the rated voltage; and x h is the leakage reactance for the h th harmonic. The leakage reactance x h can be assessed as follows (based on [15], [16]):…”

Section: ) Power Losses In Windings Due To Current Harmonicsmentioning

confidence: 99%

Coefficient of Voltage Energy Efficiency

et al. 2020

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The reduction of greenhouse gas emissions is a major contemporary challenge. This has prompted the requirements concerning energy efficiency for ships, among other things. Improvement in efficiency of ship operations could be achieved by reducing unnecessary power consumption by induction motors. Specifically, the occurrence of power quality disturbances, such as frequency and voltage deviations, voltage unbalances, and voltage harmonics, can cause an extraordinary increase in the power losses occurring in induction motors, as well as an unnecessary increase in the output power. Furthermore, excessive power quality disturbances are often interconnected with failures of on-board equipment, and in extreme cases, these may even pose a threat to safety at sea. Consequently, strict power quality monitoring of on-board microgrids can also contribute to improving safety while afloat. In this study, a dedicated tool for power quality monitoring is proposed, namely the coefficient of voltage energy efficiency, which has a value proportional to the power losses occurring in induction motors under power quality disturbances. INDEX TERMS Energy efficiency, induction motors, marine technology, power systems, power quality.

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Section: ) Power Losses In Windings Due To Current Harmonicsmentioning

confidence: 99%

Coefficient of Voltage Energy Efficiency

et al. 2020

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“…Running overload conditions occur when the motor is overloaded and operates at one or two times the rated current. Under this condition, the temperature increases or decreases gradually with a time constant that are large compared to the motor mechanical or electrical dynamics [2,[22][23][24].…”

Section: Internal Temperature Monitoringmentioning

confidence: 99%

Prediction of internal temperature in stator winding of three-phase induction motors with ann

Noğay

2010

Euro. Trans. Electr. Power

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This paper implements an artificial neural network (ANN) model able to estimate the internal temperatures in stator winding of a squirrel-cage three-phase induction motor fed by a voltage inverter. A sinusoidal pulse-width modulation (SPWM) inverter feeding three-phase induction motors were tested up to over load. The temperatures are measured in a node of stator winding. The results show that the ANN model produces reliable estimates of interior temperature of stator winding. Through this model, it is possible to determine the temperatures in the tested motors and to analyze the influence of the fundamental frequency voltage on steady state temperatures and motor performance limitation, specifically the maximum acceptable load, so that the motor does not exceed its normal steady state temperature when is supplied by an inverter.

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“…내부의 열 전달 및 열 유동을 파악하기 위해서 다양한 연구들이 있었는데, 일반적인 원형 모터에 공기 틈새를 주고 열 전달을 실험한 결과가 있 고, (2) 고속팬 용 밀폐구조에서 열과 BLDC 모터의 수명과의 관계에 대한 연구, (3) 수치해석적으로 접 근하여 냉각날개를 갖는 외전형 BLDC 모터의 열 유동을 해석한 방법, (4) BLDC 모터의 열적 성능에 대한 설계 인자의 영향을 산술적인 수치해석적으 로 해석한 방법, (5) 고속팬 용 밀폐구조형 BLDC 모 터의 열 신뢰성을 수치해석적으로 해석한 방법이 있고, (6,7) 또한 CFD(Computational Fluid Dynamics)을 사용하여 열 유동을 해석한 방법, (8) Maxwell 을 이 용하여 외부 유동을 고려하여 모터의 열 전달을 해석한 방법 (9) 일반적으로 모터에 인가 되는 부하 장치로는 직 류발전기 저항부하 인가장치, 중첩부하 인가장 치, (10) 파우더 브레이크 부하인가장치 (11) 등이 있는 데, 특히 직류발전기 저항부하 인가장치 및 중첩 부하 인가장치와 같은 시험 장치는 수백~수천 kW 급 대용량 모터의 부하 시험장치로 많이 사용되기 때문에 구축비용 및 운전비용이 과다하게 소모된 다고 보고되고 있다. 또한 파우더 브레이크 부하 인가 장치도 소형화에 대한 연구가 최근 연구되고 있다.…”

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Development of Heat Dissipation Measuring System for 1.2-kW BLDC Motor

Lee¹,

Ye²,

Lee³

et al. 2013

Transactions of the Korean Society of Mechanical Engineers A

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In this study, a heat dissipation measurement system is developed to analyze a 1.2-kW BLDC motor. It is important to check the temperature of the motor because an increase in temperature causes problems in the motor insulations, which in turn influences the motor life. A generator for a vehicle is installed to set up a load. We changed the load from 165 to 495 W. While the rpm varies from 2000 to 4000 under various load conditions, the changes in temperature were measured for the operating period by using a thermocouple. The results of experiments conducted under natural convection conditions suggest that the temperature was not stationary with the rpm, load, and coil of the motor and it kept increasing over 120 °C. However, under forced convection conditions, the temperature stationarily reached 84 °C after 4000 s. The difference between the maximum and the minimum temperatures was 10-26 °C with an increase in the rpm and load. The orders of high temperature were as follows: motor coil (Ch#1), side of motor surface (Ch#5), inside of motor cap (Ch#2), upper side of motor surface (Ch#4), and inner wall of the motor (Ch#3).

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Prediction of windings temperature rise in induction motors supplied with distorted voltage

Cited by 30 publications

References 12 publications

Coefficient of Voltage Energy Efficiency

Coefficient of Voltage Energy Efficiency

Prediction of internal temperature in stator winding of three-phase induction motors with ann

Development of Heat Dissipation Measuring System for 1.2-kW BLDC Motor

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