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Food preservation has become nowadays a major priority. Classical methods of storing food relies on controlling the temperature and humidity in storage areas. The present work is proposed another method which relies on complete air purification storage space. It is known that leading to food spoilage is the presence of bacteria and microorganisms. The presented method is based on purifying the air...
In this paper is presented a model for Pspice simulation of circuits that included lead-acid battery in their structure. Based on the discharging characteristics and operation principles of the Lead-Acid battery, the equivalent Pspice model was implemented by using voltage controlled-voltage sources in order to describe the battery behavior based of the its state-of-charge and capacitor in order to...
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...
Paper presents a complete power generation system designed with photovoltaic panels (PV). The most important target of our work is to study the influence on electricity generation efficiency of the solar radiation and temperature variations during a year for a specific location. As a modeling environment it was used Matlab/Simulink software package. The first step was to design a system consisting...
Generating electricity using renewable energy sources is a very actual problem. In this paper, Auxiliary Power Units (APU) is modeled using Matlab/Simulink resources. First, a diesel engine with governor was implemented to generate mechanical power. The rotational shaft was coupled at a synchronous machine used for generation of electrical power. A three-phase dynamic load is connected at generator...
This paper presents a test bench for a hybrid power system composed of a Lithium-ion rechargeable battery and a supercapacitor. Using this test-bench the parameters and the functionality of the entire hybrid power system can be estimated. The purpose of the paper is to test the behavior of the complete system during high load variations. In a power system the advantage of battery storage consists...
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...
In the last decades, induction heating systems have gained ground not only in fields such as industrial applications for heating, training or melting metal, but also in home appliances, such as those for cooking. The following work proposes to design a system, which will be able to heat metal using induction heating. The power transfer process will be optimized by limiting or even eliminating switching...
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 concept of “class E” was introduced by N. O. Sokal and A. D. Sokal, offering a new concept of high efficiency power amplifiers. The class E power amplifier is not defined by a special topology. The chosen circuit is a tuned amplifier, consisting of a single switch and a load network. The load network configuration consists of the shunt capacitance, series inductance, and series filter tuned to...
The intent of this paper is to present the detail of a Matlab platform used for simulation and modeling of forward converter. The forward converter is also studied via a comprehensive analysis with operation equations of the circuit. An alternative to use the circuit-oriented simulators for study of these circuits operating is to describe the circuit and the controller by means of differential and...
The concept of “class E” was introduced by N. O. Sokal and A. D. Sokal, offering a new concept of high efficiency power amplifiers. Class E power amplifier is not defined by a special topology. The chosen circuit is a tuned amplifier, consisting of a single switch and a load network. The load network configuration consists of the shunt capacitance, series inductance, and series filter tuned to the...
The paper presents the design key issues for a plasma generation method. A Class E Power Amplifier is used to generate plasma at 13.56MHz with a variable load implemented with an air coil and a variable capacitor. Class E amplifier represents a mean of high efficiency power amplification. Ideal amplifiers reach 100% efficiency and by proper filtering and tuning even the real circuit efficiency can...
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