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3 Specifications
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
3-3 L
inear Mo
tor Sp
ecificat
ion
s
3
3-
3-4 T
emper
ature Sensor
S
pe
c
ific
ations of Iron-
co
re Linear
Motors
Each Iron-core Linear Motor has one series-connected PTC thermistor per phase.
The thermistor can be used as a switch to stop the motor when the Motor Coil Unit is overheated, by
utilizing its characteristic that the resistance increases suddenly at around 110°C.
Iron-core motors also have KTY thermistors that enable the measurement of the average Motor Coil
Unit temperature.
The following graphs show the relationship between the resistance value and the temperature.
z
PTC
Note 1
The resistance value in a low temperature range is approximately 200
Ω
.
2
The resistance value increases suddenly when the temperature is at over 100ºC and reaches
approximately 2 k
Ω
or higher at 105ºC or higher.
3
The temperature detected by a PTC thermistor has an error of approximately ±10ºC. Take this error into
account and use the motor within the temperature range specified in the motor specifications. The upper
limit temperature is 130ºC.
z
KTY
Note 1
The resistance value has an error of 3% to 5%.
3-3-4
Temperature Sensor Specifications of Iron-core Linear Motors
80
85
90
95
100
105
110
115
120
125
130
0
10,000
20,000
30,000
40,000
50,000
60,000
70,000
Coil Temperature [°C]
Resistance [Ω]
500
1,000
1,500
2,000
2,500
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150 160 170
Coil Temperature [°C]
Resistance [Ω]
