A static elimination device capable of alternately outputting positive and negative DC high voltages with a single needle

Abstract

The invention relates to a static electricity eliminating device for outputting positive and negative direct current high voltages alternatively through a single needle and belongs to the field of static electricity. The discharging electrode of the static electricity eliminating device is a single discharging electrode. A positive high-voltage alternating frequency coding device, a negative high-voltage alternating frequency coding device, a positive high-voltage duty ratio coding device, a negative high-voltage duty ratio coding device and a high-voltage output dial-up device are arranged; the output ends of the positive high-voltage alternating frequency coding device, the negative high-voltage alternating frequency coding device, the positive high-voltage duty ratio coding device and the negative high-voltage duty ratio coding device are connected with a single chip microcomputer control circuit. The input end of the high-voltage output dial-up device is connected with the output end of a high-voltage drive circuit. Optoelectronic switches are arranged between the output end of the high-voltage output dial-up device and the input end of a positive voltage boosting module and between the output end of the high-voltage output dial-up device and the input end of a negative voltage boosting module. The control ends of the optoelectronic switches are connected with an I / O port of the single chip microcomputer control circuit. The first output ends of the optoelectronic switches are connected with the input end of the positive voltage boosting module and the second output ends of the optoelectronic switches are connected with the input end of the negative voltage boosting module. A positive voltage anti-back-striking overvoltage module and a negative voltage anti-back-striking overvoltage module are arranged at the output end of the positive voltage boosting module and the output end of the negative voltage boosting module. The positive voltage anti-back-striking overvoltage module and the negative voltage anti-back-striking overvoltage module are connected with the single discharging electrode.

Description

technical field [0001] The invention belongs to the field of static electricity, in particular to an active static elimination device used for static elimination. Background technique [0002] Active static elimination technology is being increasingly widely used in industries such as semiconductors, packaging, optoelectronics, communications, spraying, printing, textiles, medical equipment, building materials, and injection molding. [0003] In the existing active static elimination device, the circuit of static ion generation and control part usually adopts main control processor, positive high voltage generator, negative high voltage generator, compressed air source or fan, balanced voltage induction network, and feedback loop processing The control circuit structure composed of modules. The compressed air source or fan blows the high-voltage ions generated by the high-voltage generator; the balanced voltage induction network transmits the sensed high-voltage ions to the...

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Problems solved by technology

[0006] Since the above technical solution requires at least two discharge needles to output positive and negative ions, it will inevitably have an adverse effect on the ion balance index, and have an impact on the distance of "discharge" (commonly known as static electricity elimination), the residual voltage of the discharge electrode and other indicators; in addition , after adopting the above-mentioned "double-needle" structure, the volume of the static elimination device cannot be made very small (because the distance between the two positive and negative discharge needles has a certain limit and cannot be too close, otherwise the output of the positive and negative electrodes The positive and negative ions will be directly recombined, which will affect the effect of static elimination). When the installation space of field equipment is limited, the installation and application of static elimination devices are subject to certain restrictions

[0007] In addition, the output high voltage performance of the static eliminators in the prior art cannot be adjusted, their output high voltage is fixed, the frequency of the output voltage is fixed, and the duty ratio of the output voltage is also fixed, which means It has poor adaptability to the electrostatic environment in various places

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