PTC Element Heater

COMPONENT PARTS

PTC Element Heater






- A PTC element heater is used as the heat source for heating.
- An internal control circuit is installed for communication with A/C
auto amp..
- Based on the signals from A/C auto amp., the microcomputer
Note inside PTC element heater controls the heater output by PWM
.
NOTE:
- PWM (Pulse Width Modulation) is a system that controls current and voltage by changing the duty ratio of a constant frequency pulse wave.
- PWM is used as the adjustment method of output voltage when inverter is used as a power supply for controlling motor speed.
- PWM changes voltage application time (pulse width) using a semiconductor element and controls PTC
element heater.






PTC ELEMENT

- PTC stands for "Positive Temperature Coefficient", and is a ceramic material with barium titanate as the primary component.





- When current is applied, it heats up. Upon reaching a certain temperature (Curie temperature) the resistance suddenly increases, limiting the current, and maintaining a constant amount of heating.