6
-50
K
K
K
K
Motor
Overheating
Protection
Using
PTC
Thermistor
Inputs
Perform
motor overheating protection using the thermistor temperature resistance characteristics of the PTC
(Positive
Temperature Coefficient) built into the windings of each motor phase.
n
Related
Parameters
n
PTC
Thermistor
Characteristics
The
following diagram shows the characteristics of the PTC thermistor temperature to the resistance value.
Fig 6.40 PTC Thermistor Temperature-Resistance Value Characteristics
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control
Methods
V/f
V/f
with
PG
Open
Loop
Vec-
tor
LCD
Display
L1-03
Alarm
operation selection
during
motor overheating
Set
H3-09 to E, and select the operation when the
input
motor temperature (thermistor) input
exceeds
the alarm detection level (1.17 V).
0:
Decelerate to stop
1:
Coast to stop
2:
Emergency stop using the deceleration time in
C1-09.
3:
Continue operation (H3 on the Digital Opera-
tor
flashes).
0
to 3
3
No
A
A
A
Mtr
OH Alarm Sel
L1-04
Motor
overheating opera-
tion
selection
Set
H3-09 to E, and select the operation when the
motor
temperature (thermistor) input exceeds the
operation
detection level (2.34 V).
0:
Decelerate to stop
1:
Coast to stop
2:
Emergency stop using the deceleration time in
C1-09.
0
to 2
1
No
A
A
A
Mtr
OH Fault Sel
L1-05
Motor
temperature input
filter
time constant
Set
H3-09 to E, and set the primary delay time
constant
for motor temperature (thermistor) inputs
in
seconds.
0.00
to
10.00
0.20
s
No
A
A
A
Mtr
Temp Filter
Tr: Temperature threshold value
Tr
Tr+5
Tr
Tr
5
550
1330
Resistance (ohms)
Class F
150
Class H
180
Temperature
Содержание SYSDRIVE 3G3RV
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