What is the principle of static elimination equipment?
The static eliminator can also be called a static elimination device, and the principle is as follows. It consists of a high-voltage power generator and a discharge electrode (generally made of an ion needle). The high-voltage corona discharge is used to ionize the air into a large amount of positive and negative ions, and then a large amount of positive and negative ions are blown to the surface of the object by the wind to neutralize the static electricity, or Directly neutralize static electricity by placing the static eliminator close to the surface of the object.
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, and the discharge electrode alternates into a positive voltage and a negative voltage at a frequency of 50 Hz. A strong electric field is generated between the discharge electrode and the ground electrode, the air molecules are ionized, and the positive and negative ions are alternately generated at the tip of the discharge electrode. When the surface of the charged object is positive, the negative ions will neutralize. Conversely, if the surface is at a negative potential, the positive ions will neutralize. The AC corona product must be grounded to work properly, but some positive and negative ions will be directed to the ground due to grounding, but the structure Simple, positive and negative ion balance is good.
2. DC corona products
The DC high voltage generator raises the input voltage of 220V and outputs positive voltage and negative voltage respectively. A strong electric field is generated between the positive and negative discharge electrodes, the air molecules are ionized, positive ions are generated at the tip of the positive discharge electrode, and negative ions are generated at the tip of the negative discharge electrode. Negative ions are simultaneously generated to neutralize the surface of the object. When the surface of the charged object is positive, the negative ions will neutralize. Conversely, if the surface is at a negative potential, the positive ions will neutralize. The DC corona product can generate positive and negative ions without grounding. The positive and negative ions on the surface of the object are sufficient, and the static electricity is neutralized very quickly.
3. Pulse DC Corona Products
The pulsed DC high voltage generator raises the input voltage of 220V and alternately 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 positive, the negative ions will be And, conversely, if the surface is at a negative potential, the positive ions will neutralize. Since the switching period of the pulsed DC positive and negative ions is 200-300 times longer than that of the power frequency AC static eliminator, there is no self-neutralization of the positive and negative ions, and there is no need Grounding and loss of positive and negative ions, and the conversion period can be adjusted according to the distance of the static object to be removed. The distance is long, the conversion period can be long, and the time can be short when the distance is close. The pulse DC static eliminator is in the absence of a fan. Negative ions can also reach a very long range of action.