Determination of Temperature in the Construction of Permanent Magnet Tubular Linear Actuator

Abstract:

The calculation results for the thermal field of the permanent magnet tubular linear actuator (PMTLA) have been presented in the paper. For the analysis of heating, four different mathematical field models have been created and compared. Each of them uses the finite element method (FEM). In the most simplify model only the standard convective heat transfer coefficient has been implemented. In the most sophisticated model, thermal radiation, convective heat transfer and dependence of the coil resistance vs. temperature have been included. In all models the Joule losses have been assumed as the heat source. The numerical models have been verified experimentally with using the infrared camera and by measuring the coil resistance. Using the most precise model, the nominal current value has been determined for PMTLAs with two different permanent magnet types: NdFeB and SmCo. The conclusions are valuable in the designing process of many actuators with permanent magnets.

• Periodical: Solid State Phenomena (Volume 214)
• Pages: 113-120
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.214.113
• Online since: February 2014
• Authors: Andrzej Waindok*
• Keywords: Heating of the Motor Constructions, Linear Actuators, Thermal Field Calculations, Thermal Radiation Phenomenon

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