IMD 100 Integration manual 4189360015 Rev. G
IMD configuration
Page 90 of 243
Special considerations when PTC is used:
PTC is a nonlinear sensor. While a MOTORTEMP warning will still be active at 87.5% of max
motor temp, it will most likely come at the same time as the MOTORTEMP error. The PTC typical
resistance characteristics are depicted in the following figure:
It is the PTC Tref (also called Tn) that is the decisive factor for the triggering of the MOTORTEMP
error. Typically, PTC according to DIN 44081/82 or IEC60034-11:2004 is used, which means that
there are three PTCs in series, one in each winding. When configuring the maximum temperature
for the motor, it is imperative that the threshold is not below the resistance in minimum
temperature, which might result in a MOTORTEMP error if the weather is extremely cold and the
motor was not running for a while. It is recommended to configure the maximum temperature to
the following (assuming the T
REF
-5K
≈ 550Ω):
1 PTC: Configure the Max. Temp to 9300 (corresponding to 550
Ω)
3 PTCs: Configure the Max. Temp to 30950 (corresponding to 1650
Ω)
•
Brake current:
Select High or Low depending on the brake current. The detection (Brake OK flag)
and protection of the brake output circuit is adjusted to higher current.
•
Motor brake delay:
o
Brake output ON
: The time needed from when the brake output is ON (activated) until the
brake is disengaged (released). See section
for details. Manufacturers often
gives the time from 100% brake power to 1 or 10% brake power. In such case or if in doubt it is
recommended to add some delay to ensure that that the brake is fully disengaged before
starting with motor movement.
o
Brake output OFF
: The time needed from when the brake output is OFF (deactivated) until the
brake is fully engaged with 100% efficiency. Do not use a value higher than 1000 ms. The IMD
will stop modulation after approximately 1 s if the value is 1000 or higher and only the brake will
be used to stop the motor. See section
on page
for details. . Manufacturers often gives
the time from 0% brake power to 90% brake power. In such case or if in doubt it is
recommended to add some delay to ensure that that the brake is fully engaged before stopping
the modulation.
NOTE The brake release and brake engage times are different depending on the brake. In some
brakes the release time is shorter than the brake time, while in others it is the opposite.
•
N nom:
Nominal motor speed in revolutions per minute (RPM)
– not used if
Sync. Servo is
selected as motor type.
•
F nom:
Nominal motor frequency
– not used if
Sync. Servo is selected as motor type.
•
V nom:
Nominal motor voltage
– not used if
Sync. Servo is selected as motor type.
•
Cos Phi:
The cosine value of the motor
– not used if
Sync. Servo is selected as motor type.
•
Feedback:
Select the feedback method in the dropdown list. Only
“Resolver” is supported as
feedback method. If no resolver is used (motor type is Async.V/f), select
“SLS” (sensor-less).
Resistance (
)
Temperature (
°
K
)
TREF
1330
550
T
REF
-5K
T
REF
+5K