Next Article in Journal
The Valuation of the Operational Flexibility of the Energy Investment Project Based on a Gas-Fired Power Plant
Next Article in Special Issue
Analysis and Verification of a Wide Input Voltage PWM Converter with Variable Windings
Previous Article in Journal
Microscopic Pore Structure of Surrounding Rock for Underground Strategic Petroleum Reserve (SPR) Caverns in Bedded Rock Salt
Previous Article in Special Issue
± 180° Discontinuous PWM for Single-Phase PWM Converter of High-Speed Railway Propulsion System
Open AccessArticle

An Improved LPTN Method for Determining the Maximum Winding Temperature of a U-Core Motor

by 1, 1,* and 2
1
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
2
School of Engineering and Applied Science, Aston University, Birmingham B4 7ET, UK
*
Author to whom correspondence should be addressed.
Energies 2020, 13(7), 1566; https://doi.org/10.3390/en13071566
Received: 26 February 2020 / Revised: 8 March 2020 / Accepted: 15 March 2020 / Published: 28 March 2020
(This article belongs to the Special Issue Design and Analysis of Electric Machines)
In a traditional lumped-parameter thermal network, no distinction is made between the heat and non-heat sources, resulting in both larger heat flux and temperature drop in the uniform heat source. In this paper, an improved lumped-parameter thermal network is proposed to deal with such problems. The innovative aspect of this proposed method is that it considers the influence of heat flux change in the heat source, and then gives a half-resistance theory for the heat source to achieve the temperature drop balance. In addition, the coupling relationship between the boundary temperature and loading position of the heat generator is also added in the lumped-parameter thermal network, so as to amend the loading position and nodes’ temperature through iterations. This approach breaks the limitation of the traditional lumped-parameter thermal network: that the heat generator can only be loaded at the midpoint, which is critical to determining the maximum temperature in asymmetric heat dissipation. By adjusting the location of heat generator and thermal resistances of each branch, the accuracy of temperature prediction is further improved. A simulation and an experiment on a U-core motor show that the improved lumped-parameter thermal network not only achieves higher accuracy than the traditional one, but also determines the loading position of the heat generator well. View Full-Text
Keywords: uniform heat source; lumped-parameter thermal network; thermal half-resistance; loading position uniform heat source; lumped-parameter thermal network; thermal half-resistance; loading position
Show Figures

Figure 1

MDPI and ACS Style

Li, B.; Yan, L.; Cao, W. An Improved LPTN Method for Determining the Maximum Winding Temperature of a U-Core Motor. Energies 2020, 13, 1566. https://doi.org/10.3390/en13071566

AMA Style

Li B, Yan L, Cao W. An Improved LPTN Method for Determining the Maximum Winding Temperature of a U-Core Motor. Energies. 2020; 13(7):1566. https://doi.org/10.3390/en13071566

Chicago/Turabian Style

Li, Bin; Yan, Liang; Cao, Wenping. 2020. "An Improved LPTN Method for Determining the Maximum Winding Temperature of a U-Core Motor" Energies 13, no. 7: 1566. https://doi.org/10.3390/en13071566

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop