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The increasing complexity of the electronic devices and the challenges involved in satisfying the needs of higher power and energy determine us to pay an important attention on supercapacitors behaviour study. Even if their energy density is about ten times lower than the energy density of the batteries, supercapacitors offer new alternatives for applications where energy storage is needed. This paper...
The apparition on market of the low-cost webcams with, at least, satisfactory qualities open up new directions regarding the implementation of human computer interaction (HCI) interfaces. The paper presents a HCI interface for mouse cursor control. The purpose of the implemented solution is to control the mouse cursor by user hand gestures captured through a webcam. For improving the gesture recognition...
This paper presents a simplified Powersim (PSIM) model for simulating and estimating the power losses due to the change in the relative position of the sun to a fixed south oriented solar panel. The proposed equation used for describing the difference between the sun-tracking system and the fixed system is validated by testing a solar panel guidance system based on data provided by Stellarium software...
When we wish to achieve an autonomous control mode of a submersible robot, we must take into account data collected from sensors such as location, steady or dynamic states of the robot. Within this article will deal with a method for obtaining robot status from data collected with a tri-axial gyroscope in order to establish the state of rest or motion. The data collected with the tri-axial gyroscope...
This paper presents a study and the design with the technical aspects of implementing electronic ballast used for lighting and keeping the power of a lamp while restricting and controlling the input current during its activity. The electronic ballast circuit proposed is based on two power converters, like a boost converter with power factor correction (PFC) and an a half bridge converter with resonant...
The quality of power supply can influence the reliability of capacitors for power factor compensation PFC [1]. In addition to the power parameters, the operating temperature plays a decisive role. The aluminum capacitors are the most reliability critical components from PFC-equipment. In order to improve the design and achieve an optimal operation, the main parameters of the capacitor bank have been...
The protection of the IGBT's in the case of an over-current or a short-circuit, respects the general methodology of a power electronic device protection. Usually, every power device is protected by its driver, which becomes a multifunctional circuit capable of assuring the driving signal, monitoring the operation state as well as providing its protection. In this paper we propose and realize a protection...
The Intermediate Data Format (IDF) is a specification designed to provide a neutral representation for exchanging printed circuit assembly (PCA) data among mechanical design (MCAD), PCA layout (ECAD), and physical design analysis (MCAE) applications. Powerful analysis software, like Ansys, Maxwell, Semcad, Altium Designer or SolidWorks - CircuitWorks, can import the idf files and use the model for...
In this paper a two-phase motor control with an AtMega8 microcontroller is presented. The energy efficiency of motor-driven products is increased by adding variable speed control using a microcontroller. In this way, the motor can be operated in a wide range of speed and the implemented power saving procedures increases energy efficiency of motor-driven product. The motor is controlled by two Sinus...
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