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| Working principle of Thermistor resistor , symbol |
Working principle of Thermistor resistor , symbol
Welcome to the Electron Tips blog. In today's lesson, we will provide you with a simplified explanation about thermal resistance, or thermistors, which are considered one of the most important electronic elements, as the latter is related to changing the temperature of the medium in which it is located. Thermistor ? What is the principle of thermal resistance working within electronic circuits What are the types of thermal resistors? .
Definition of thermistor:
Thermal resistance is an electronic element whose value changes with the temperature of the medium in which it is located. The higher or lower its value, the greater the resistance to electric current. It can be classified as one of the temperature sensors that measure the temperature of electronic elements.
The thermistor consists of a high-temperature metal wire such as nickel or chromium wrapped around a spiral template, in addition to the insulator and conductors, thanks to which the thermal resistance is connected to external electrical circuits, and finally the outer cover that protects the thermal resistance from moisture, dust, and external factors in general, and these picture shows the internal structure of the thermistor:
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| Thermistor Structure |
Symbol electric of Thermistor resistor:
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| Thermistor Symbol |
The working principle of Thermistor:
Thermistor is an electronic element that is characterized by changing its resistance to temperature change, as its resistance increases with the temperature drops and decreases with the increase in temperature or vice versa, and there is two types of Thermistor resistor NTC Thermistor and PTC Thermistor.
Types of Thermistors resistors:
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| Types of Thermistor resistor |
Explanation of PTC thermal resistance:
PTC is an abbreviation for positive temperature coefficient, This type of thermal resistor increases the temperature of the environment in which it is located, the higher its value meaning that there is a direct relationship between it and the temperature.
Explanation of NTC thermal resistance:
NTC is an abbreviation for negative temperature coefficient, which simply means that as the temperature increases, its value decreases, which is the opposite of the first type.
Thermistor application:
Thermistors are used in many engineering and technical applications, some of which are:
It is used to control the temperature of electric motors and electronic devices.
They are used in fans and heat exchangers, as well as in pipelines for transporting gas and liquids.
It is also used in many computers and smartphones to measure the temperature of microprocessors.
Conclusion:
In conclusion, this was a simple topic about explaining the thermistor, which is considered a temperature sensor.