Computec
CDD6
EN
CDD6: user manual – rev.07
Page 60/74
5.10
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 first threshold (85°C), the door drive activates AUXS output (if configured by P-07).
-
the second threshold (95°C) the door speed is reduced both for opening and closing
-
the alarm threshold (110°C), the door drive stops the door and, and waits for the recover
temperature (75°C) to restart normal behavior.
The following diagrams represent the behavior of the descripted signals.
- Figure 5-2: thermal trend under progressive over-heating conditions -
T
AUXS
“AL06”
ALAL06AL02
s
tatus
ON
OFF
85°C
75°C
T
Reduced speed
ON
OFF
95°C
75°C
T
Alarm
“AL02”
ON
OFF
110°C
75°C