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Design of Digital Soldering Station
Matušková, Adéla ; John, David (referee) ; Rubínová, Dana (advisor)
The subject of this Bachelor’s Thesis is a design of a digital soldering station, which is defined for amateurs, but also for professionals. The aim is to design a soldering station following user´s comfort, safety and technological and structural requirements. This project includes the analysis of current products, deals with entered aims of the work and describes the final solution.
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Laser diode soldering
Straka, Michal ; Holík, Milan (referee) ; Stejskal, Petr (advisor)
This work deals with the laser diode soldering. The theoretical part summarizes general and acquired findings about soldering technology and materials that occur in this process. It also describes factors that affect the reliability of solder joints. It is closely focused to the shaping of the solder joint and structure of intermetallic layer. The practical part of this work is focused on the design of equipment for laser diode soldering and subsequent shaping of the samples. The quality of soldered joint is compared against the quality of joint created using re-flow technology - remelting in in-line smelter. The structure and thickness of the intermetallic layer, the number and shape of the voids in the solder joints are compared.
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Mini reflow oven
Pavelka, Radek ; Jelínek, Aleš (referee) ; Burian, František (advisor)
This thesis is aimed to design a small oven for PCB soldering using the reflow method. It contains description of the oven’s construction, it’s thermodynamic parameters and the design of the control and power unit PCB as well as their control software. A remote PC control and monitoring application is also a part of this thesis.
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Rework and Repair Procedures of Selected Components and LED on Various Types of PCBs.
Pospíšil, Tomáš ; Ondřej, Klemš (referee) ; Starý, Jiří (advisor)
This work deals with technology of rework and repairs of electronic soldering assemblies. The work is primarily focused on the rework and repairs of electronic soldering assemblies with the light emitting diode. The theoretical part describes the technological methods of soldering and reworking of electronic assemblies, their diagnostics, evaluation of their influence on reliability and functional properties. The practical part is focused on the real application of technological procedures of rework and repairs, their testing and evaluation. Furthermore there is described and tested the influence of thermal load during soldering on the properties of light emitting diodes.
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Mechanical Properties of solder joint
Meliš, Josef ; Starý, Jiří (referee) ; Stejskal, Petr (advisor)
This thesis deals with the differences between the mechanical properties of surface conditionings of the printed circuit boards and various types of soldering pastes. The practical part of the thesis describes all the steps necessary to conduct the experiment. The experiment will evaluate the measured mechanical strength of the solder joint for each surface conditioning, the types of solders, the increase in thickness of the intermetalic layer during long-term aging and the change in the structure of the solder joint.
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Design of Soldering Gun
Běhal, Tomáš ; Křenek, Ladislav (referee) ; Ondra, Martin (advisor)
This bachelor thesis deals with the design of transformer soldering gun. The product is analyzed from the historical, technical and design ways at first. Subsequently, the new design of this product is proposed, with respect to ergonomic, technical, aesthetic and psychological aspects.
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Reliability of LED Panels Solder Joints
Šimon, Vojtěch ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
Thesis is focused on the effect of heating factor on quality of solder joints. In theoretical part is solved reflow soldering technology, problematice of solder paste choice or criteria of soldering profile setting. The practical part is dedicated to demonstrating the impact of heating factor on solder joint quality. There are used X-Ray analysis, microsections and electron microscopy. In the final part of this thesis are summarized knowledge from theoretical part and experimental obtained results to defend of next steps in diploma thesis.
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Development of an electric shock welding method for a combination of thin-film and thick-film structures
Hruška, Andrej ; Jankovský, Jaroslav (referee) ; Otáhal, Alexandr (advisor)
At the start this bacherol thesis deals with connection methods of terminals on thick and thin-films. One of the methods, which this thesis is mostly orientated on, is a terminal connecting with the shock welding method. The point was to test, if this method of connecting terminals is suitable for a combination of the thick and thin-films applications. The experiment included making of template for vapour plating, vapour plating of thinfilm on substrate, its galvanic plating and testing. Mechanical tensile strength of created welds was tested and in the end there was done the optical inspection of internal interface of welds.
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FPGA based controller drive of BLDC motor
Makówka, David ; Kváš, Marek (referee) ; Valach, Soběslav (advisor)
This bachelor’s thesis concerns different control approaches for driving a BLDC motor using an FPGA chip. Also, a custom type of an inverter circuit was designed. A six-step commutation control scheme has been implemented, to ease the future integration of field-oriented control. The field-oriented control has been designed and simulated in a semestral thesis using a MATLAB Simulink tool. The targeted platform is the FPGA development board Basys 3. Hardware is rated to deliver up to 6 A of current. The handling of error conditions is mainly provided by a DRV8305 gate driver integrated circuit. Errors are also forwarded to the FPGA, for performing further actions. The structure of a controlling scheme is accustomed to the tuning of motor parameters rather than for end-users. Parameters can be set during motor operation and states of the control scheme are stepped separately. The sensing of voltages and currents is handled by an analog-digital converter.
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