Principle of Static Eliminator
The static eliminator can also be called a static elimination device, and its principle is as follows. It is composed of a high-voltage power generator and a discharge electrode (usually made of ion needles). The air is ionized into a large number of positive and negative ions through ** high-voltage corona discharge, and then a large number of positive and negative ions are blown to the surface of the object to neutralize static electricity. Or directly put the static eliminator close to the surface of the object to neutralize static electricity.
Static eliminators are mainly divided into the following types:
1. AC corona products
The AC high voltage generator raises the 220V input voltage to above 4KV, the discharge electrode alternates with positive and negative voltages at a frequency of 50Hz, a strong electric field is generated between the discharge electrode and the ground electrode, air molecules are ionized, and the discharge electrode** alternately generates positive and negative ions When the surface of a charged object is at a positive potential, the negative ions will neutralize it. On the contrary, if the surface is at a negative potential, the positive ions will neutralize it. AC corona products must be grounded to work normally, but some positive and negative ions will be grounded to the ground, but Simple structure, good balance of positive and negative ions.
2. DC corona products
The DC high voltage generator raises the 220V input voltage and outputs positive and negative voltages respectively. A strong electric field is generated between the positive and negative discharge electrodes, and air molecules are ionized. The positive discharge electrode ** generates positive ions, and the negative discharge electrode ** generates negative ions. , Positive and negative ions are generated at the same time to neutralize the static electricity on the surface of the object. When the surface of the charged object is at a positive potential, the negative ions will neutralize it. On the contrary, if the surface is at a negative potential, the positive ions will neutralize it. DC corona products can generate positive and negative ions without grounding , The positive and negative ions acting on the surface of the object are sufficient, and the speed of neutralizing static electricity is very fast.
3. Pulsed DC corona products
The pulsed DC high voltage generator raises the 220V input voltage and outputs positive and negative voltages on the discharge electrode in a cycle of 4-6 seconds, thereby alternately generating positive and negative ions. When the surface of the charged object is at a positive potential, the negative ions will be And, on the contrary, if the surface is at a negative potential, the positive ions will neutralize it. Since the switching cycle of pulsed direct current positive and negative ions is 200-300 times longer than that of power frequency alternating current static eliminator, there will be no self-neutralization of positive and negative ions, and there is no need Grounding loses positive and negative ions, and the conversion cycle can be adjusted according to the distance of the object to be electrostatically removed. The distance can be longer, the conversion cycle can be long, and the distance can be short. Negative ions can also reach a long distance.