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Thermal Calculations of Permanent Magnet Motors in High Current Technology
Deeb, Ramia ; Singule, Vladislav (oponent) ; Duroň,, Jiří (oponent) ; Aubrecht, Vladimír (vedoucí práce)
This dissertation focuses on magnetic, thermal, and cooling calculations of servo motor with permanent magnets (M718 I servo motor produced by VUES company). These calculations are achieved using dedicated software based on numerical methods of finite elements (FEM) and finite volumes (FVM). The 2D (two dimensional) magnetic analysis of the motor is computed using FEMM (finite element method magnetics). 3D (three dimensional) magnetic analysis is computed too using ANSOFT software. From the performed analyses, distribution of the magnetic field inside the servo motor, the circumferential distribution of the magnetic flux density in the air gap center are obtained. Eddy current losses are calculated depending on the magnets dimensions and the value of the air gap magnetic flux density. Joule losses are also calculated using ANSOFT for 3D model. Two cooling models are designed for the servo motor. In the first one, internal cooling system is used. Some modifications (openings in the motor frame and radial fan mounted on the motor shaft inside the frame) are added to the motor original model. In the second model, external cooling system is used. For this type, cooling slots are added to the original frame and radial fan is mounted on the motor shaft out of the frame. Fluid flow and thermal transient analyses are computed for the original motor and for the modified one (internal cooling and external cooling model) using ANSYS Workbench program. Heat characteristics of the original servo motor are measured using different sensors. Finally, an evaluation of the different results is performed. This work was performed at the Faculty of Electrical Engineering and Communication, within doctoral study program “Electrical Engineering and Communication” with the branch of “Power Electrical and Electronic Engineering”. A substantial part of this work was supported by the Centre for Research and Utilization of Renewable Energy (CVVOZE), under projects CZ.1.05/2.1.00/01.0014 and FEKT S-11-9.
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Thermal Calculations of Permanent Magnet Motors in High Current Technology
Deeb, Ramia ; Singule, Vladislav (oponent) ; Duroň,, Jiří (oponent) ; Aubrecht, Vladimír (vedoucí práce)
This dissertation focuses on magnetic, thermal, and cooling calculations of servo motor with permanent magnets (M718 I servo motor produced by VUES company). These calculations are achieved using dedicated software based on numerical methods of finite elements (FEM) and finite volumes (FVM). The 2D (two dimensional) magnetic analysis of the motor is computed using FEMM (finite element method magnetics). 3D (three dimensional) magnetic analysis is computed too using ANSOFT software. From the performed analyses, distribution of the magnetic field inside the servo motor, the circumferential distribution of the magnetic flux density in the air gap center are obtained. Eddy current losses are calculated depending on the magnets dimensions and the value of the air gap magnetic flux density. Joule losses are also calculated using ANSOFT for 3D model. Two cooling models are designed for the servo motor. In the first one, internal cooling system is used. Some modifications (openings in the motor frame and radial fan mounted on the motor shaft inside the frame) are added to the motor original model. In the second model, external cooling system is used. For this type, cooling slots are added to the original frame and radial fan is mounted on the motor shaft out of the frame. Fluid flow and thermal transient analyses are computed for the original motor and for the modified one (internal cooling and external cooling model) using ANSYS Workbench program. Heat characteristics of the original servo motor are measured using different sensors. Finally, an evaluation of the different results is performed. This work was performed at the Faculty of Electrical Engineering and Communication, within doctoral study program “Electrical Engineering and Communication” with the branch of “Power Electrical and Electronic Engineering”. A substantial part of this work was supported by the Centre for Research and Utilization of Renewable Energy (CVVOZE), under projects CZ.1.05/2.1.00/01.0014 and FEKT S-11-9.
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