phytron
49
MA 1235-A016 EN
9 Heating Curve of MCC-2
i
The adjusting housing temperature depends on the motor type, the motor cable
length, phase current, supply voltage, arrangement of the housing and the
tolerance of the components.
In practice it can differ from the diagrams below.
The housing temperature should not exceed 75 °C (measured on the right side of the
housing and MCC-2 vertically arranged). In order to prevent destruction of the hardware,
the internal emergency cutout shuts down actively at higher temperature.
On the basis of the heating curve (fig. 41) the
τ
ϑ
thermal time constant
can be computed
(point of intersection between 0.63
∆ϑ
and the heating curve).
The expected housing temperature at different ambient conditions can be estimated by
τ
ϑ
time constant, start tangent and the combination of heating- and cooling curve.
Measuring conditions or operation:
•
Device vertical arranged (LED on the top)
•
48 V
DC
supply voltage
•
Motor type: ZSS42.200.2.5
•
Temperatures are normalized, i.e. relatively without bench mark
Normalized housing temperature, maximum current, 100% duty cycle
Fig. 41: Heating curve for one/two axes operation and maximum current
