THERMISTOR

                                       THERMISTOR

HI!!

  TODAY, I AM GOING TO DISCUSS TECHNICAL INFORMATION ABOUT THERMISTOR

THERMISTOR:

                                          THERMISTOR IS A KNOW AS A VARIABLE RESISTOR BUT THERMISTOR RESISTANCE VARY WITH TEMPERATURE.

                                                    THERMISTOR RESISTANCE CHANGE WITH THIS  EQUATION➤  🔺R=K🔺T  ACCORDING TO VALUE OF K WE DIVIDE THERMISTOR INTO TWO PART.

WHERE, 🔺R=CHANGE IN RESISTANCE

                🔺T=CHANGE IN TEMPERATURE

                      K=TEMPERATURE CO-EFFICIENT OF THERMISTOR

MATERIAL USE FOR MAKING THERMISTOR:

1).SEMICONDUCTING MATERIAL     FOR N-TYPE DOPING: TITANIUM AND  FERRIC OXIDE. AND FOR P-TYPE DOPING: NICKLE OXIDE AND LITHIUM        

WORKING OF NTC:

WHEN TEMPERATURE WILL BE INCREASE THE NUMBER OF ELECTRON IN SEMICONDUCTOR MATERIAL GO TO CONDUCTION BAND.WHEN MORE AND MORE ELECTRON REACH CONDUCTION BAND SO THE MAJORITY CHARGE CURRENT FLOW THROUGH THE THERMISTOR. 

TWO TYPE OF THERMISTOR:

1) POSITIVE TEMPERATURE COEFFICIENT

2) NEGATIVE TEMPERATURE COEFFICIENT

1) POSITIVE TEMPERATURE COEFFICIENT

IN POSITIVE TEMPERATURE COEFFICIENT RESISTANCE WILL BE INCREASE WHEN TEMPERATURE INCREASE AND RESISTANCE WILL BE DECREASE WHEN TEMPERATURE DECREASE. THIS TYPE OF RESISTANCE USE INFUSE.

2) NEGATIVE TEMPERATURE COEFFICIENT

 NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR IS KNOW AS A NTC. IN NTC THERMISTOR RESISTANCE INCREASE WHEN TEMPERATURE DECREASE OR RESISTANCE DECREASE WHEN TEMPERATURE INCREASE.

THIS IS GRAPH OF NTC THERMISTOR:

USING OF THERMISTOR:

1.     PREVENT INRUSH CURRENT INTO MOTOR.

2.     TEMPERATURE MEASUREMENT.

3.     OVERCURRENT PROTECTION CIRCUIT.

4.     HEAT DETECTOR.

5.     IN INDUCTION COOKER.

6.     TEMPERATURE SWITCH.

I HOPE YOU LIKE THIS POST,

  "INFORMATION THAT'S MAKE FUTURE BRIGHT" 

BY-MK