Thermal Behavior and Thermal Protection of Brushless Motors
DOI:
https://doi.org/DOI:10.17213/0136-3360-2020-6-11-14Keywords:
brushless motor, thermal behavior, thermal protection, thermal resistance, thermistorAbstract
When choosing a motor, in addition to calculating the RMS current of the load diagram, it is recommended to check its thermal regime. This is because cataloged motor thermal resistance values usually differ from the application one. The calculation of the thermal resistance of the motor with the catalog data is presented. The disadvantages of built-in (in the motor) thermal sensors associated with the complexity of their installation directly in the "hot" spots of the motor winding are considered. It is recommended to give preference to the electronic I2T method, implemented by using an electric drive. The calculation of thermal protection and an example of its functioning on the basis of a modern motion controller are given.References
Underwrites Laboratories, “UL 1446 - Systems of Insulating Materials - General” URL: http://ulstandardsinfonet. ul.com/scopes/scopesnew.asp?fn=1446.html)
Underwriters Laboratories, “UL 2111 - Overheating Protection for motors,” URL:http://ulstandardsinfonet.ul.com/ scopes/2111.html
Richard Welch Jr. Calculating a practical hotspot safety margin // Machine Design. 2010. Jun 01.
Richard Welch Jr. Recognizing motor temperature sensor limitations // Machine Design. 2010. Aug 01
Richard Welch Jr. Why Servomotor Temperature Sensors can Give Misleading Readings // Machine Design. 2010. Feb 03.
Thermik Corp., URL:http://www.thermik.de
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Published
2020-12-15
How to Cite
(1)
Gannel, L. Thermal Behavior and Thermal Protection of Brushless Motors. electromeh 2020, 63, 11-14.
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https://orcid.org/0000-0002-7955-939
