Motor Overheating Protection Using Ptc Thermistor Inputs - YASKAWA CIMR-G7U Technical Manual



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.
Related Parameters
Parameter
Number
Motor
Overheat
Alarm
Operation
L1-03
Selection
MOL Thm
Input
Motor
Overheat
Fault
Operation
L1-04
Selection
MOL Filter
Time
Motor
Temperature
Input Filter
L1-05
Time
MOL Filter
Time
-54
6
Name
Description
Display
Sets operation selection when the
motor temperature analog input
(H3-09 = E) exceeds the OH3
alarm level (1.17V)
0: Ramp to Stop
1: Coast to Stop
2: Fast-Stop
3: Alarm Only
Sets stopping method when the
motor temperature analog input
(H3-09 = E) exceeds the OH4 fault
level (2.34V).
0: Ramp to Stop
1: Coast to Stop
2: Fast-Stop
This parameter adjusts the filter on
the motor temperature analog input
(H3-09 = E). Increase to add
stability, decrease to improve
response.
Change
Setting Factory
during
Range Setting
V/f
Operation
0 to 3 3 No A
0 to 2 1 No A
0.00
to 0.20sec No A
10.00
Control Methods
Open Open
V/f
Loop Flux Loop
with
Vector Vector Vector
PG
1 2
A A A A
A A A A
A A A A