What is the thermistor motor PTCR starter?
PTCR is a new type of semiconductor material with positive temperature characteristics of temperature change,The motor starter utilizes the current-time characteristics of the PTC ceramic,For the compressor to start frequently,The use of PTC ceramic components can be repeatedly subjected to the start circuit with a long time high current, high voltage impact characteristics,PTCR widely used in refrigerators, air conditioning compressors,Together with the start-up coil to form the starting circuit.PTCR starter in the power supply for a short time,Can be through a larger current, so that the motor starts running;After the motor is running normally, PTC automatically disconnects the start circuit.
Thermistor motor PTCR starter work process:
When the voltage is applied to the PTCR,Began to have a large current I flow,After a certain time ts,With the increase of PTCR temperature,The resistance value increases rapidly,Resulting in a sharp decline in current,This time ts can be from 0.1s to a few seconds,Its value depends on the PTCR heat capacity, resistance, heat dissipation conditions, load resistance and operating voltage,When the external voltage is canceled,PTCR will cool to room temperature resistance.
The use of this principle, in the home refrigerators and air conditioners and other electrical appliances to start on a wide range of use.It should be noted that when using the delay performance of PTCR,If you want to repeat the same delay time,Should be separated by a certain time tr (the so-called recovery time)The PTCR is restored to the original state temperature,So should avoid repeated action,Otherwise PTCR can not provide continuous high current,So that the compressor can not start the normal work,Will cause the compressor to burn.
Thermistor motor PTCR starter work process:
When the voltage is applied to the PTCR,Began to have a large current I flow,After a certain time ts,With the increase of PTCR temperature,The resistance value increases rapidly,Resulting in a sharp decline in current,This time ts can be from 0.1s to a few seconds,Its value depends on the PTCR heat capacity, resistance, heat dissipation conditions, load resistance and operating voltage,When the external voltage is canceled,PTCR will cool to room temperature resistance.
The use of this principle, in the home refrigerators and air conditioners and other electrical appliances to start on a wide range of use.It should be noted that when using the delay performance of PTCR,If you want to repeat the same delay time,Should be separated by a certain time tr (the so-called recovery time)The PTCR is restored to the original state temperature,So should avoid repeated action,Otherwise PTCR can not provide continuous high current,So that the compressor can not start the normal work,Will cause the compressor to burn.
