What is the power change curve of PTC Heating Sheet Heating Tube under different voltages?
Publish Time: 2024-09-23
As a commonly used heating element, the power change of PTC Heating Sheet Heating Tube shows a unique law under different voltages.
When the voltage is low, the power change curve of PTC Heating Sheet Heating Tube is relatively gentle. At first, due to insufficient voltage, the current is relatively small, and the heating power of the heating sheet or heating tube is also at a low level. As the voltage gradually increases, the current increases, and the power begins to rise slowly, but before reaching the Curie temperature of the PTC material, its resistance change is relatively small, so the power growth is relatively linear.
When the voltage is increased to make the temperature of the PTC Heating Sheet Heating Tube reach the Curie temperature, the situation changes significantly. At this time, the resistance of the PTC material increases sharply, causing the current to drop, and a clear turning point appears in the power change curve. After this turning point, the trend of power growth slows down, and even within a certain voltage range, the power will remain basically stable. This is because the characteristics of PTC materials determine that they can automatically adjust their resistance after reaching the Curie temperature, thereby achieving constant temperature heating, and the power will also stabilize.
However, if the voltage continues to rise and exceeds a certain limit, it may cause the insulation performance of the PTC Heating Sheet Heating Tube to deteriorate, the material aging to accelerate, and even damage the heating element in severe cases. At this time, the power may decrease or fluctuate.
In general, the power change curve of the PTC Heating Sheet Heating Tube under different voltages is a process that first gradually increases with the increase of voltage, tends to stabilize after reaching the Curie temperature, and may be abnormal when the voltage is too high. In practical applications, understanding and mastering this power change law is of great significance for the correct selection and use of PTC Heating Sheet Heating Tube.
