|
|
E-bikes
Rynda, Vít ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This bachelor thesis deals with the topic of electromobility, specifically the drive tract of electric bicycles or recumbent bicycles. The thesis focuses on the most essential parts of the traction system, which are the battery and the electric motor. It includes an analysis of the different concepts of the mutual arrangement of the power source and the electric motor of currently used electric bicycles. It also includes descriptions and characteristics of batteries, from past to present representatives. It also includes a brief description of the types of electric motors in use. The practical part involves working with software designed for modifying and configuring the control units of electric vehicles with a central electric motor. Several control unit settings are made, where each of them offers customized motor power limits, assistance levels and driving behaviour. The individual settings are tested under the same specific conditions and compared with each other. Finally, a possible ideal solution is proposed in the form of control unit value settings for the examined criteria.
|
|
|
Semi-actively controlled magnetorheological damper of electric motor fork
Blahuta, Jiří ; Vimmr, Jan (referee) ; Kubík, Michal (advisor)
The passive dampers used today, which work by dissipating energy using an oil fill, allow only limited damping force adjustment, which must be set before driving. Passive dampers are at their peak in terms of design and no further advances in ride comfort are expected. This is where magnetorheological dampers have the potential to increase ride comfort and improve handling with semi-active control. They achieve better performance thanks to a rapid change in damping force, which can then be controlled almost instantly according to the current driving conditions. MR dampers are already successfully used in the automotive sector but have not yet made a commercial breakthrough in the cycling segment. The main reason is their high weight compared to current passive dampers. The aim of this work is to design a lightweight and fast MR damper for the fork of a Kuberg electric motorbike. For the success of the product, the weight of the design needs to be minimized. For the proper operation of a semi-active damper, it is necessary to achieve a fast time response of the damping force, which is most affected by the occurrence of eddy currents in the magnetic circuit. Another problem is to achieve sufficient damping force in the activated state, so a suitable prediction model must be used. The design of the damper also needs to be able to fit into the limited space of the fork and the damper must be fitted with sensors. The result of this work is the design of two generations of MR damper and the fabricated working sample. Generation I MR damper was used for testing and verification of the model. Generation II MR damper is then the final design with reduced mass. The weight of the generation II damper is only 19% higher than the original passive damper. The total weight of the MR damper is 1,6 kg. The new MR damper retains the original dimensions and stroke and has integrated sensors in the design. The proposed MR damper has the potential to be successful in the electric bicycle segment and other electric single-track vehicles where its implementation is most advantageous. However, it can also be used in conventional mountain bikes. Together with a semi-active control unit, it allows for better ride comfort and handling characteristics.
|
|
|
City HPV
Pykal, Vojtěch ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
This bachelor‘s thesis deals with the issue of bicycles for seniors and city traffic with additional electric drive. The introductory part deals with the influence of movement on human health. Further development and technical analysis of bicycles. This is followed by a comprehensive analysis of pedelecs and an outline of an ideal electric bike for seniors. In conclusion, there is my evaluation of this issue.
|
|
| |
|
|
Renewal energy in HPV
Bittner, Ivo ; Vorel, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.
|
|
|
Renewal energy in HPV
Bittner, Ivo ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.
|
|
|
City HPV
Pykal, Vojtěch ; Nedoma, Jiří (referee) ; Kaplan, Zdeněk (advisor)
This bachelor‘s thesis deals with the issue of bicycles for seniors and city traffic with additional electric drive. The introductory part deals with the influence of movement on human health. Further development and technical analysis of bicycles. This is followed by a comprehensive analysis of pedelecs and an outline of an ideal electric bike for seniors. In conclusion, there is my evaluation of this issue.
|
|
|
Renewal energy in HPV
Bittner, Ivo ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.
|
|
| |
|
|
Renewal energy in HPV
Bittner, Ivo ; Vorel, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This thesis deals with comprehensive study and design of recovery system of a road vehicle powered by human power. It contains an overview of different types of heat recovery devices, their characteristics, advantages, disadvantages and applicability in the construction of such a vehicle.
|
guest ::
