INTENSIVE ENERGY SAVING METHOD OF GRAIN DRYING

The method of drying of grain and removal of moisture which is based on receiving and processing of arising thermal processes described by the thermodynamics equation is developed. This way was a little studied and was less often applied because of considerable imperfection of the production technology of the converter of frequency of big power (to some hundred kilowatts) and frequencies (to some hundred kHz). However, at present the equipment for induction heating gained big development and its application on drying installations in comparison with traditional ways of heating more preferably. Offered induction way of drying of grain where the grain material passes through drying mine by gravity. For carrying out pilot studies, it is developed the transistor–thyristor device, which consists of the control unit, the converter of frequency, the bunker with the screw in it that has helix surface, inductor windings, and a hydrometer. The algorithm of receiving and data processing is developed in the MATLAB software. At further increase in frequency the coefficient of losses won't change, therefore, considering that our device works in GHz range coefficient of losses will be constant, i.e. equal 0,6. Therefore when studying influence of humidity of grain on coefficient of losses we can consider with confidence that frequency doesn't influence the accuracy of measurements. The amount of heat received by moisture in a weevil increases with increase in its humidity. It is a first time when the Maxwell’s formula is suitable for calculating a heat taken from grain moisture. Reduction in specific cost of all plants demands the appeal to development and introduction simple on a design of induction heaters that is an actual problem. Agricultural production, unlike other types of production, possesses a considerable resource – the reserved energy in a biological object. Thus, use of information approach to the description of reactions of biological objects on external influence allows to develop electrotechnologies for increase of productivity, productivity of the grain drying equipment, decrease in power consumption of process of drying of grain.

INTENSIVE ENERGY SAVING METHOD OF GRAIN DRYING

The method of drying of grain and removal of moisture which is based on receiving and processing of arising thermal processes described by the thermodynamics equation is developed. This way was a little studied and was less often applied because of considerable imperfection of the production technology of the converter of frequency of big power (to some hundred kilowatts) and frequencies (to some hundred kHz). However, at present the equipment for induction heating gained big development and its application on drying installations in comparison with traditional ways of heating more preferably. Offered induction way of drying of grain where the grain material passes through drying mine by gravity. For carrying out pilot studies, it is developed the transistor–thyristor device, which consists of the control unit, the converter of frequency, the bunker with the screw in it that has helix surface, inductor windings, and a hydrometer. The algorithm of receiving and data processing is developed in the MATLAB software. At further increase in frequency the coefficient of losses won't change, therefore, considering that our device works in GHz range coefficient of losses will be constant, i.e. equal 0,6. Therefore when studying influence of humidity of grain on coefficient of losses we can consider with confidence that frequency doesn't influence the accuracy of measurements. The amount of heat received by moisture in a weevil increases with increase in its humidity. It is a first time when the Maxwell’s formula is suitable for calculating a heat taken from grain moisture. Reduction in specific cost of all plants demands the appeal to development and introduction simple on a design of induction heaters that is an actual problem. Agricultural production, unlike other types of production, possesses a considerable resource – the reserved energy in a biological object. Thus, use of information approach to the description of reactions of biological objects on external influence allows to develop electrotechnologies for increase of productivity, productivity of the grain drying equipment, decrease in power consumption of process of drying of grain.

A Novel Comprehensive Draw-Out Power Circuit of High Voltage Thyristor

The method of self-energy extracting has been adopted in high voltage thyristor device more and more widely. In consequence of the existing insufficient of high heat loss and large variation range of storage voltage value, this paper designs a novel comprehensive draw-out power circuit which is suitable for almost all kinds of working conditions of thyristor. The circuit includes voltage draw-out power module, current draw-out power module and the coordination control module between them. The principle of each module has been detailed analyzed and the calculation formulas of the corresponding parameters have been concisely given. At last, every conclusion drawn in this paper has been verified in simulation.

Some Considerations of the Pulse Power Switch Centered on Thyristor Device

For high energy short pulse discharge applications, like electromagnetic launchers or magnetic forming, mostly the thyristor technology is used. The presented thyristor switch assemblies using 125 mm wafer size are made to switch 62.4MJ stored energy into a load in very short time. The maximum transient peak current of 26 kilo-amperes peak for 20 ms with convection water and air cooling. For this presentation we concentrate on the Thyristor technology as this offer the highest current capability but are not in the position to switch-off any current. Some measures must be used to the pulse switch centered on Thyristor device, i.e., proper selection of the static and dynamic parameters of the thyristor, enough power for triggering the device, and efficient cooling of the device, which can make it possible to produce devices with high blocking voltage combined with very high current handling.

Bipolar Degradation in 4H-SiC Thyristors

Bipolar degradation in 4H-SiC thyristors subjected to high current density stress is reported. The thyristor device structure, its fabrication process as well as testing conditions are described. The Electron Beam Induced Current (EBIC) technique was used for defect analysis in testing of both degraded and non-degraded devices. Possible nucleation sites responsible for the generation of observed defects in degraded devices are discussed