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Motors for Special Drives
Martinek, Radek ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
This project solves electric motor, which are used in specific drives. The aim is to show you the use of electric motor, then direct current motor, shielded pole motor and subsequent upgrade of direct current motor. I focused mainly on DC motors. I performed measurements on several motors APS Světlá nad Sázavou. Then I conducted a design to upgrade the wiper motor. I conducted innovation in the simulation program FEMM, where I was able to achieve a reduction motorcycle while maintaining performance. Benefit from the work of this enhancement is the possibility of small DC motors and possibility of subsequent cooperation with APS Světlá nad Sázavou.
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Measurement of weak magnetic field in 3D space
Bár, Martin ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
The aim of this thesis is to theoretically examine the magnetic field of miniature cylindrical NdFeB magnets, compare the simulation results to real-world measurements, and design a magnetic field probe using suitable sensors. A FEM simulation was conducted using Ansys AIM and FEMM 4.2. The simulation shows that the magnetic induction on the surface of the magnet depends on the diameter/height ratio. The simulation results also show that 21 µm thick protective layer of Ni-Cu-Ni metal on the surface of NdFeB magnets lowers flux density of the smallest magnet sample (1x1 mm) by up to 14 %. It was also concluded that a larger magnet edge radius results in a higher flux density on the surface of the magnet. The biggest differences between simulation data and data measured by the F.W. BELL gaussmeter occurred in the smallest magnet sample. Using the FEMM 4.2 simulation software, a three-axis magnetic field probe was designed. Potential problems with this probe design have been identified. A simple procedure for probe calibration was proposed.
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Measurement of weak magnetic field in 3D space
Bár, Martin ; Klusáček, Stanislav (referee) ; Havránek, Zdeněk (advisor)
The aim of this thesis is to theoretically examine the magnetic field of miniature cylindrical NdFeB magnets, compare the simulation results to real-world measurements, and design a magnetic field probe using suitable sensors. A FEM simulation was conducted using Ansys AIM and FEMM 4.2. The simulation shows that the magnetic induction on the surface of the magnet depends on the diameter/height ratio. The simulation results also show that 21 µm thick protective layer of Ni-Cu-Ni metal on the surface of NdFeB magnets lowers flux density of the smallest magnet sample (1x1 mm) by up to 14 %. It was also concluded that a larger magnet edge radius results in a higher flux density on the surface of the magnet. The biggest differences between simulation data and data measured by the F.W. BELL gaussmeter occurred in the smallest magnet sample. Using the FEMM 4.2 simulation software, a three-axis magnetic field probe was designed. Potential problems with this probe design have been identified. A simple procedure for probe calibration was proposed.
|
|
|
Motors for Special Drives
Martinek, Radek ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
This project solves electric motor, which are used in specific drives. The aim is to show you the use of electric motor, then direct current motor, shielded pole motor and subsequent upgrade of direct current motor. I focused mainly on DC motors. I performed measurements on several motors APS Světlá nad Sázavou. Then I conducted a design to upgrade the wiper motor. I conducted innovation in the simulation program FEMM, where I was able to achieve a reduction motorcycle while maintaining performance. Benefit from the work of this enhancement is the possibility of small DC motors and possibility of subsequent cooperation with APS Světlá nad Sázavou.
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