National Repository of Grey Literature 3 records found  Search took 0.02 seconds. 
Drivers for power switching transistors GaN MOSFET
Fiala, Zbyněk ; Pazdera, Ivo (referee) ; Vorel, Pavel (advisor)
The thesis describes the procedure during the proposal of the driver circuits for the GaN MOSFET transistors, which are known for their fast switching especially. In the first instance of this thesis the issue of GaN MOSFET transistors is described and also the thesis describes the different types of MOSFET transistors in the way of their electrical and mechanical attributes. The specific type driver circuit is stated in the thesis, which was selected in the semestral thesis. For this circuit the boost converter with an output power 600W and high switching frequency 800kHz was proposed as an attempt measurement circuit. This boost converter was measured after its construction was done. The waveforms captured by the oscilloscope are commented also. In the conclusion the assessment is done about this new technology of power switching transistors.
Quadrotor 3D Intuitive Flying
Husák, Robert ; Plch, Tomáš (advisor) ; Obdržálek, David (referee)
The Rotor-based Unmanned Aerial Vehicle (R-UAV) is a robotic aerial plat- form capable of Vertical Take-Off and Landing. It is commonly controlled by a "two stick" interface common to radio controlled models of ships and airplanes. However, this method of control proves to be difficult to learn and master in the domain of R-UAV. Therefore, we examined other control devices: smartphone, gamepad, joystick, 3DConnection SpaceNavigator and Novint Falcon. They were used by 19 volunteers to perform two simple navigation scenarios with AR.Drone, a small R-UAV from Parrot. We separated the pilots into two groups, based on their experience with the R-UAV remote control. We measured the time needed for each device to fulfill every task, including the number of unwanted collisions with obstacles, as well as the pilot's satisfaction with it. According to the results of the experiment, joystick and smartphone proved to be less intuitive and effec- tive among all pilots, especially the inexperienced. Gamepad seemed to be most usable for experienced pilots, although the inexperienced had problems distribut- ing control between two hands, as we expected. 3DConnexion, SpaceNavigator and Novint Falcon were rated the best devices for inexperienced users.
Drivers for power switching transistors GaN MOSFET
Fiala, Zbyněk ; Pazdera, Ivo (referee) ; Vorel, Pavel (advisor)
The thesis describes the procedure during the proposal of the driver circuits for the GaN MOSFET transistors, which are known for their fast switching especially. In the first instance of this thesis the issue of GaN MOSFET transistors is described and also the thesis describes the different types of MOSFET transistors in the way of their electrical and mechanical attributes. The specific type driver circuit is stated in the thesis, which was selected in the semestral thesis. For this circuit the boost converter with an output power 600W and high switching frequency 800kHz was proposed as an attempt measurement circuit. This boost converter was measured after its construction was done. The waveforms captured by the oscilloscope are commented also. In the conclusion the assessment is done about this new technology of power switching transistors.

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