The diploma thesis describes a development of electrically powered longboard. An overview of known solutions regarding electrically powered longboards is presented in the first part. We tried to gather as much information as possible about the composition and electrical drive of longboards. From all this information, we extracted the most important ones and prepared the first concept. The construction of the chassis, which is one of the most important parts of longboard, is described. It comprises of wheels, the transmission mechanism and electric motor. Each individual set of chassis and a final configuration are described. Selection of the engine is a key factor. It must develop sufficient torque and has to operate with high efficiency. For this task, a BLDC motor was chosen. Since the motor is electronically commutated, it is necessary to know the rotor position. Therefore, a Hall position sensor was implemented.
After the completion of the chassis, we started the development of the control unit which is located on the longboard. The main control unit is responsible for the proper control of the motor. Thus, the user can control the torque of the engine and speed of the longboard. The individual parts of the main control unit are shown separately and described in detail. A Bluetooth microcontroller is a part of the main control unit which provides wireless link between a longboard and a remote control. We added the possibility to connect several control units together, therefore the nominal power of the longboard can be increased. After this, a printed circuit board, the construction and development of the Bluetooth remote control unit are described. We used the Wii game console casing and adapt it to our needs. The electronic circuit of the remote control is also specially designed to fit our needs. Finally, several measurements of manufactured circuits and tests of electrically powered longboard have been made.
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