What is a high-voltage DC power supply
A high-voltage DC power supply is also called a DC high-voltage power supply. It is a voltage regulator with stable current and large output power, which can reach several kilowatts. The frequency of the old high-voltage DC power supply is not as high as it is now, and the power supply is so large that several people cannot move it. The conversion efficiency and stability are much lower than those of modern high-voltage DC power supplies. However, with the improvement of circuit breaker technology, high-frequency circuit breaker conversion technology has begun to be applied to high-voltage power, and its energy storage is very stable, safe and reliable.
The principle of high-voltage DC power supply in dust removal in vacuum cleaners
A narrow pulse voltage waveform with a pulse width of 100μS or less is superimposed on the basic DC high voltage, and a sharply rising pulse voltage is applied to the electric field electrode to make the corona distribution uniform and generate a strong corona discharge corona wire on the corona electrode. The internal breakdown voltage of the electric field is greatly improved to make the dust more charged. At the same time, the corona current can be adjusted by changing the pulse repetition frequency without increasing or decreasing the peak voltage, and dust collection can be achieved at a lower current density.
Main technical indicators: dust emission concentration and operating energy consumption can be reduced by more than 30% respectively.
Technical features: improve the charging efficiency of dust (especially fine dust), which greatly improves the dust removal efficiency and reduces the operating energy consumption. After the conversion is completed, the outlet particulate matter emission concentration is 16.91mg/m3, the pulse power supply can reduce particulate matter emissions by more than 30%, and the operating energy consumption of the high-voltage power supply is reduced by 30%-70%.
Reasons for vacuum cleaners to use high-voltage DC power supply
According to the technical route of superimposing pulse high voltage on basic DC high voltage, it is planned to divide the pulse high-voltage power supply into two parts: basic DC high-voltage unit and pulse high-voltage unit. These two units are designed with separate structures. Among them, the basic DC high-voltage unit uses the original power frequency three-phase high-voltage unit, and adds a high-voltage isolated switch cabinet, adds a high-voltage isolation switch cabinet with two inlets and one outlets of basic DC high voltage and pulse high voltage, and the pulse high-voltage unit corresponds to a series LC resonant circuit.
Main process operation and control parameters: input power three-phase AC 380V/50Hz, rated output basic DC voltage 72kV, rated output basic DC current 1600mA, rated load capacity 115nF, rated output pulse peak voltage 80kV, pulse width 85μS, pulse repetition frequency from 1PPS to 120PPS, the maximum spark rate allowed by the equipment is 60 times/minute.
Energy and resource conservation and comprehensive utilization can reduce dust emissions by more than 30% and reduce operating energy consumption by 30% to 70%.
