encased type ptc thermistor for motor starting mz62 series-九游会下载

1.encased type ptc thermistor for motor starting mz62 series

2.lead wire type ptc thermistor for motor starting mz61 series

3.ptc thermistor for the motor circuit start of refrigerator mz6 series

brief introduction:

ptc thermistor for motor-starting are mainly used in the circuit of refrigerator and air-conditioner motor-starting, frequency conversion air-conditioner-starting, 

motor heat protection

working principle:

motor-starter is a machine that makes use of the ptc thermistor pottery current-time feature. when the voltage applied to ptc thermistor, the heavy current 

begins to pass through, and after certain time, with temperature increasing of the ptc thermistor, resistance value goes up sharply and cause current to 

fall down rapidly. during this time, ts can change from 0.1s to several seconds. the specific time depends on ptc thermistor’s heating capacity, 

resistance value, heating dissipation condition, overloaded resistance and operating voltage. when the outer electricity voltage withdrawals, ptc thermistor

 will become cool and alter to normal resistance. this principle of ptc thermistor is used extensively in household refrigerator and air-conditioner 

motor-starter and so on. one point should be noticed that when using the delay-time feature of ptc thermistor, we should make the ptc thermistor recover to 

its original temperature in certain time tr(that is what we called recovering time). so sudden repeated movements should be avoided, otherwise ptc thermistor

 cannot provide constant heavy current, and the compressor cannot start or work normally, which will cause the compressor burnt.

when the electric motor is being started, its inertia and counterforce of loading has to be overcame  (eg: its counterforce must be overcame when 

refrigerator compressor starts), so starting the electric motor needs relatively heavy current and torque. when it runs normally, and the torque need has 

to be brought down to save energy. give electric motor a circle assistant loop, and it works only when the motor starts and it will break up after the 

current goes regularly. this effect can be reached by connecting the ptc thermistor in series in starting circle assistant loop and cutting off the circle 

assistant loop when ptcr enters the state of high resistance,which can reach the required effection.

advantages:

the starting circuit with ptc thermistor owns the feature of being economic, reliable and simple which is better than the former heavy hammer starting 

circuit. 

additionally, it has the characteristics as below:

1. low noise, contactless and long service life 

2. can control the current without other controllers 

3. small size can be connected to compressors for use directly  

4. support most of the circuits loop that compressors need 

5. low power consumption 

6. high stability,durability and reliability 

7. cheap but with many functions 

8. quick and powerful starting 

marking of part number:

1.series:ptc thermistor for motor starting

2.type:   1-disc          2-encased

3.r25 resistance:   15r-15ω  

4.resistance tolerance:  m /-20%         h /-25%         n /-30%

5.curie temperature:   k-125℃        l-135℃