Improved thermal model of forced air‐cooled motors considering heat transfer in wire‐wound winding and end region

Liu, Fei; Hu, Jianhui; Li, Yong; Wang, Qian

doi:10.1049/iet-epa.2019.0780

Cited by 13 publications

(9 citation statements)

References 26 publications

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“…This approach is based on the combination of two experimental tests: a short-duty transient excitation for extraction winding thermal parameters, and a steady-state excitation to estimate thermal parameters related to the heat transfer from the winding. To enhance the accuracy of parameter calculations, an approach based on the coupling of analytical and local numerical methods has been proposed in [65] for forced air-cooled motors in which the winding conduction thermal resistance is derived from 2-D numerical calculations. Then, the convection resistance of the airflow in the end region is obtained from 3D local numerical analysis.…”

Section: Lumped Parameter Thermal Networkmentioning

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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Section: Lumped Parameter Thermal Networkmentioning

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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“…The steady state temperature rising of RVCA X55 rotor is obtained by ANSYS Workbench. In the simulation, an equivalent single layer coil is used to replace a multi‐layer coil, and the conductor with the circular cross section is replaced by the regular octagonal cross section to avoid small irregular meshes [13]. An appropriate loss density is added to the copper winding (total winding power loss 19.5 W), and a constant temperature boundary of 20°C is applied to the bottom surface.…”

Section: Steady‐state Thermal Simulationsmentioning

confidence: 99%

Calculation, simulation and fast estimation of thermal resistance of rotary voice coil actuators

Chen

et al. 2022

IET Electric Power Appl

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Rotary voice coil actuator (RVCA) is mainly used for reciprocating drive of small inertia loads in a limited range of angle, which is widely used in aerospace and other fields. Thermal resistance is one of the most important parameters of RVCAs, which is directly related to the steady‐state temperature rising and operation reliability. Because the thermal resistance cannot be measured directly, the analytical method is usually used to calculate the thermal resistance of the RVCA. However, due to the particularity of the thermal circuit calculation, the calculation is complicated and the result is not accurate. It is not conducive for engineering applications of this kind of actuator. In this paper, a series of rotary voice coil motor is selected as the research object. Through analytical calculation and thermal simulation, a more accurate thermal resistance calculation correction model and thermal resistance value of RVCAs are obtained, and the accuracy of the estimation results is verified by experiments. On this basis, the effective volume of the coil frame of the RVCA is selected as the variable, and the concise variation law of the series thermal resistance data is obtained. This paper provides a fast and accurate estimation method for the thermal resistance of RVCA, which has an important reference value for expanding the engineering applications of RVCAs.

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“…Whereas, the computation of LPTN models is usually instantaneous, thus it is suitable for tasks like condition monitoring [23,24]. The two approaches can even be combined together for taking advantage of both their merits in building the thermal models of induction machines [25,26]. Numerous thermal models have been developed for predicting the thermal response of induction machines operating under fault conditions.…”

Section: Introductionmentioning

confidence: 99%

Transient thermal models of induction machines under Inter‐turn short‐circuit fault conditions

Zhao

Zanuso

Peretti

2023

IET Electric Power Appl

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Induction machines are the working horses in a lot of industries. Inter‐turn short‐circuit (ITSC) fault is one of the most common failure modes taking place in them. It can generate large fault currents that lead to a local temperature rise in the faulty stator slot, which deteriorates the working performance of the machine or even cascades to a complete machine breakdown. This article focuses on developing transient thermal models for an induction machine under ITSC faults. The aim of these thermal models is to understand the thermal behaviour of the induction machine at different ITSC fault propagation stages. The first thermal model is based on finite element method (FEM) simulation that includes a physics‐based model for the thermal contact resistance. The second thermal model is a lumped parameter thermal network that models the stator as inter‐connected slot‐number parts. They are both capable of modelling the characteristic of non‐uniform temperature along the circumferential direction for the induction machine operating under ITSC fault conditions. After area‐weighted averaging the results of the FEM simulation, it is found they are quantitatively consistent, with an average relative error magnitude of 5%, as well.

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Improved thermal model of forced air‐cooled motors considering heat transfer in wire‐wound winding and end region

Cited by 13 publications

References 26 publications

An overview of thermal modelling techniques for permanent magnet machines

An overview of thermal modelling techniques for permanent magnet machines

Calculation, simulation and fast estimation of thermal resistance of rotary voice coil actuators

Transient thermal models of induction machines under Inter‐turn short‐circuit fault conditions

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