Thermal Modelling of Totally Enclosed Fan Cooled motors

Rönnberg, Kristian; Beniakar, Minos E.

doi:10.1109/icelmach.2018.8506824

Cited by 8 publications

(8 citation statements)

References 18 publications

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“…For the semi-open fin channels, this surface is segregated into three different sections, rear, active, and front parts, and according to the hypothesis, the entire surface is covered by semi-open fin channels. According to the airflow speed, the convection coefficient of each section is calculated by (8). Then the effect of the terminal box is added as the blockage factor.…”

Section: Resultsmentioning

confidence: 99%

“…According to (8), the only unknown parameter with the highest effect on the calculation of the forced convection coefficient is the airflow speed along the semi-open fin channels. To use the empirical correlation, an accurate estimation of the rate of the cooling airflow in each fin channel is necessary.…”

Section: Air Cooling Speed Measurementmentioning

confidence: 99%

“…2, by leaking the airflow from semi-open fin channels, the air-speed starts to reduce in the axial orientation [6]. Moreover, some of the fin channels of TEFC housing are blocked by the terminal box and bolt lugs, which terminates in the unbalanced distribution of the airflow about the machine housing [7], [8]. Therefore, calculating the heat transfer coefficient from the housing of TEFC is the conjugate problem, which consists of fluid flow and heat flow problems [6].…”

Section: Introductionmentioning

confidence: 99%

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Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor

et al. 2020

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This paper proposes the analytical calculation of the heat transfer coefficient from the housing of a totally enclosed fan cooled (TEFC) machine during the active cooling. A particular focus is on the calculation of the heat transfer coefficient from the machine's housing for different fan rotational speeds. The paper describes the challenges and provides solutions to dominate them during the analytical calculation of the heat transfer coefficient a TEFC electrical machine. Finally, the proposed method is validated experimentally on a totally enclosed fan cooled synchronous reluctance motor (SynRM), and good correspondence between the analytical and experimental results is obtained.

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Section: Resultsmentioning

confidence: 99%

Section: Air Cooling Speed Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor

et al. 2020

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“…The method which refers as a BEM-based FEM improves the stability of discretization for convection dominated problems. A simplified model for considering radiation in outer surface of the stator is presented in [80]. FEM based calculations need surface heat transfer coefficient as an input.…”

Section: 3mentioning

confidence: 99%

An overview of thermal modelling techniques for permanent magnet machines

Khalesidoost

Faiz

Mazaheri‐Tehrani

2022

IET Science Measure & Tech

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Permanent magnet (PM) machines have gained increasing attention from the industry because of their potential merits over conventional electrical machines. High‐temperature level in electrical machines is a major factor that can adversely impact the performance and health conditions of these machines. These effects need to be minimized to make them competitive with currently operational machines in the industry. It can be done by performing a thorough thermal analysis of the prototype during the design process and proper online thermal monitoring of the machine during the operation stage. Thermal modelling is a powerful tool for achieving such goals in both cases. This paper aims to review the state‐of‐the‐art of thermal modelling techniques and provide a detailed comparison of them in PM machines. The fundamental concepts of heat transfer and sources of heat in PM machines are first discussed. Then, different thermal modelling techniques, including thermal subdomain models (TSMs), lumped parameter thermal networks (LPTNs), finite element models (FEMs), computational fluid dynamics (CFD), reduced order models (ROMs), and hybrid thermal models (HTMs) are introduced and compared. Finally, the utilization of these models in the thermal design, control, and monitoring of PM machines is studied.

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“…For the optimization of cooling fins design of a casted housing, a 2D technique with conjugate heat transfer was explored and utilized; this approach will minimize the time it takes to assess a huge number of alternative designs [19]. The influence of core loss distribution, airflow speed distribution, and thermal radiation was evaluated in this [20] study, which compared multiple thermal modeling methodologies for Totally Enclosed Fan Cooled (TEFC) electric motors. The thermal performance of a TEFC electric motor was numerically simulated and studied in [21].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of heat transfer from perforated fins of an induction motor housing

Bhambere

Chaudhari

2022

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

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The major goal of this research article is to demonstrate how perforation on the fin surface of an induction motor’s housing improves cooling performance. Heat transfer study was also conducted between traditional fins and the suggested perforated fins housing. An Induction Motor (IM) overheats as a result of continuous operation, raising its temperature, lowering its performance and shortening its lifespan. The innovative designs and development of fins are necessary for effective cooling and enhancing the thermal performance of IM. In the present work, the thermal analysis of induction motor is carried out by means of providing the perforations on existing fins and varying perforation size from 4 mm to 10 mm diameters and number of perforation from 20 to 11, on fins and observed the steady state heat transfer and temperature variation. In this regard, the half part of IM is modelled because of symmetry and steady state thermal analysis is carried out for un-finned, solid fins and perforated fins using ANSYS software. Results show that, more reduction in temperature on the surface of IM is observed in case of perforated fins having 11 perforations of 10 mm diameter, as compared to the other cases.

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Thermal Modelling of Totally Enclosed Fan Cooled motors

Cited by 8 publications

References 18 publications

Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor

Determination of heat transfer coefficient of finned housing of a TEFC variable speed motor

An overview of thermal modelling techniques for permanent magnet machines

Numerical analysis of heat transfer from perforated fins of an induction motor housing

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