Computec
CDD5.0
EN
CDD 5.0: user manual – Rev.01
Page 48/63
5.9
Motor Thermal management
The monitoring of the motor thermal state is important to:
-
Prevent motor over-heating
-
Preserve the motor to extend its lifetime
-
Prevent functional problems
The motor in use does not have temperature probes installed inside, for this reason the motor temperature
is estimated based on a i2T model. For each motor type are defined the Thermal Resistance and Capacity,
used with the motor current to calculate the motor temperature estimation.
Under particular working condition (wrong mechanical or electrical settings, too heavy door for the
installed motor type, additional frictions, etc.), it can happen that during the normal working cycle of door
opening and closing, the estimated motor temperature derives, this is a symptom of motor over-heating. If
the estimated motor temperature becomes higher than the alarm threshold, the door drive stops the door
and activates AUXS output (if configured by PC07), and waits for the temperature recover to restart normal
behavior..
- Figure 5-2: thermal trend under progressive over-heating conditions -
Motor Temperature
Time
25°C
Tmax
125%
Tmax
150%
Tmax
AL02
AL02
Thermal state following progressive over-heating