Temperature Sensor Specifications Of Ironless Linear Motors - Omron R88D-KN01L-ECT-L User Manual

3 Specifications
3-3-8

Temperature Sensor Specifications of Ironless Linear Motors

Ironless Linear Motors have one PTC thermistor in its Motor Coil Unit.
This PTC thermistor has a characteristic that the resistance increases suddenly at around 110
Utilize this characteristic to build a circuit to stop the motor in case of overheating.
Be sure to build a circuit that detects overheating at a resistance at around 90
maximum coil temperature 110
Ironless Linear Motors also have another NTC thermistor for measuring the average Motor Coil Unit
temperature.
PTC
Resistance [Ω]
6,000
5,000
4,000
3,000
2,000
1,000
0
85
Note 1 The resistance value in a low temperature range is approximately 50 Ω.
2 The resistance value increases gradually when the temperature is at over 90ºC.
3 The temperature detected by a PTC thermistor has an error of approximately ±10ºC. Take this error into
account and use the motor at or lower than the maximum temperature allowed for the Motor Coil Unit. The
upper limit temperature is 110ºC.
NTC
Resistance [Ω]
5,000
4,000
3,000
2,000
1,000
0
40 50
Note The temperature value has an error of ±7 to ±10ºC.
3 - 44
C allowed for the Motor Coil Unit is not exceeded.
º
90 95 100
60 70 80 90
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
º
105 110
Coil Temperature [°C]
100 110 120 130
Coil Temperature [°C]
C.
º
C to 100 C, so that the
º
115