Development of high voltage source for spraying plants with ionized aerosol
2019
Antonov, S., Stavropol State Agrarian Univ. (Russian Federation)
When spraying plants, a number of problems appear that contribute to the decrease in efficiency. These are such problems as the wind drift, large difference in the size between the drops, their flowing off the sheet. The application of the method of ionization of aerosol droplets eliminates these drawbacks. A jet of fluid passing through an electric field of high intensity acquires an electric charge. To obtain the effect of charging drops, it is necessary to create a corona discharge field. This field can be obtained, if two conditions are met: a) use of the electrode system “plane – string”; b) the voltage on the electrodes is not less than 15 kV. To obtain this voltage, it is necessary to develop a high-voltage voltage source that receives power from the on-board electrical network of the tractor. The initial data developing a high-voltage source of voltage are: technical parameters that determine the level and quality of the output parameters with given mass and dimensional indicators; operational, which determine the reliability of the device for the given time and working conditions; economic, which determine the cost of production and operation of the device. Some of the requirements are opposite. For example, the requirements of low mass and high reliability for a long time, minimum dimensions and cost. Therefore, when developing high voltage sources, the main criteria are highlighted and trade-off decisions are made. The development of a high-voltage source includes determination of the operating modes and selection of power transistors, calculation and selection of voltage multiplier elements, determination of the design parameters of a power transformer.
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