Agricultural adjustable high voltage static generator

Abstract

The invention discloses an agricultural adjustable high voltage static generator, which is composed of an input low voltage adjustable circuit, a high voltage module and a voltage feedback circuit. The input low voltage adjustable circuit is achieved by a voltage stabilizing circuit and an initial voltage adjustable circuit. The magnitude of output voltage can be changed by changing tap positions of digital potentiometers RP1 and RP2. The digital potentiometer RP1 performs large step adjustment of the output voltage, and the digital potentiometer RP2 performs small step adjustment of the output voltage. The initial voltage adjustable circuit sets initial voltage by adjusting the tap position of a rheostat RP, so as to maintain the initial voltage of the output voltage within the range of 0-5000V. The voltage feedback circuit keeps the output voltage stable. The high voltage output is connected with a charging electrode. The invention meets requirements for voltage for obtaining the same biological effect by different crops in electrostatic spraying, achieves sectional adjustment of voltage output, and does not require a special control chip. The circuit structure is simple, a few components are needed, the overall dimension is small, and the weight is light.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to an adjustable high-voltage electrostatic generator for agriculture. Background technique [0002] Aeronautical electrostatic spraying technology can be used in forest, grassland, orchard and crop pest control. It can not only improve the deposition effect of droplets on the surface of target plants, reduce drift loss, reduce environmental pollution, but also has the convenience and speed that other plant protection machinery cannot replace. It is very necessary for the timely control of large-scale and explosive agricultural and forestry diseases and insect pests. [0003] High-voltage static electricity is generated from a high-voltage generator, and different crops require different electrostatic high-voltage voltage levels to obtain the same biological effect, so there are certain requirements for the performance of the high-voltage generator. For aviation ele...

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Problems solved by technology

The above inventions and documents can realize the predetermined voltage output, adopt mobile power input, and have a high-voltage feedback circuit, but it is easy to generate spike interference and resonance interference, which affects the accuracy of other electronic equipment in the measurement of electrostatic spray charge-mass ratio, and is easy to cause system damage. Heat generation, shorten life, and its control circuit is complicated, which is not conducive to the lightness and miniaturization of high-voltage power supply

[0006] Patent CN202889207, a negative polarity fixed output high-voltage power supply circuit composed of TL431; patent CN1941582A relates to a high-voltage power supply, including a high-voltage power supply processor, a transformer / rectifier, a load detector, and a fixed high-voltage output; although the reduction of interference is achieved, the realization of The high-voltage power supply is lightweight and miniaturized, but its output is not adjustable, and the voltage output has no feedback, so the stability of the output voltage cannot be guaranteed

In the literature Programmable Voltage Regulating Method for 15 kV High Voltage DC Power Supply (2008) and the programmable high voltage power supply based on the digital potentiometer MCP42010 (2007), although the digital potentiometer is used to control the high voltage output, the output voltage range is low and it is not easy to Meeting the High Voltage Demands of Electrostatic Spraying

[0007] For electrostatic spraying, in finding the optimal charging voltage value, it is necessary to adjust the voltage of the high-voltage generator to obtain the optimal value of the test, and the double-step adjustment can greatly reduce the workload. Most of the existing literature uses single-step adjustment, and Different crops require different voltage levels to obtain the same biological effect, so it is necessary to set a certain initial voltage range for the high voltage generator

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