Research And Realization On Miniaturizational High Voltage Source Of Static Eliminator

With the improvement of industrial automation, the generation of static on production line is more and more frequent while the degree of harm caused is also growing. In order to research the generation of static and prevent the harm of static, Electric Static Protection(ESP) as a new technology is established. In a variety of static protection methods, neutralization is an active one. It is the main method to neutralize the static on the charged body with the air ions generated by static eliminator in practical application. It needs high-voltage to generate air ions and this makes high-voltage source be the key component of static eliminator. Conventional high-voltage source has a large volume and low stability while the new-style high-voltage source which integrates the high-frequency technology, power electronics technology and high-voltage technology, gradually achieves the target that the high-voltage source is miniaturization, light weight and high stability. This paper will base on the design proposal of the new-style high-voltage source to design a miniaturizational high-voltage AC source using in static eliminator.The design idea of the high-voltage source sets the voltage doubler rectifier circuit, the high-frequency transformer, inverter technology as the core and the Atmage16 is used as the main control chip in the control circuit. The MCU generates a PWM signal input the full bridge inverter chip after optocoupler isolation, and control the working condition of the inverter circuit. The inverter circuit turns the 24 V DC to AC and the AC is boosted by the high-frequency transformer. Then the output of transformer is send to the voltage rectifier circuit and the voltage which can accord with the design requirements is finally generated. The entire high-voltage source contains two boost circuits and each one’s output is connected with the output bus through a high-voltage switch. The two boost circuits are controlled by two PWM signals in order to make them work alternately and this makes the high-voltage DC outputs of them connect with the output bus alternately. The frequency of high-voltage AC on the output bus can be controlled through modulating the switching frequency of the two high-voltage switch. The high-voltage AC with tunable frequency is generated through this way.This topic is based on the above design ideas. The main contents finished are design and calculation of the circuit diagram, type-selection of the components, design and manufacture of the PCB. Through these processes, the final testing circuit of high-voltage source is set up. After a series of tests on the high-voltage source circuit board, some waveforms are obtained and analyzed briefly. Finally the feasibility of this project is verified.