ElmoMC SimplIQ Digital Servo Drives-Trombone Installation Guide - Manual (Page 65)

Trombone Installation Guide Installation
MAN-TROIG (Ver. 1.403)
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65
3.14.3. How to Use the Charts
The power dissipation in the chart includes the losses of the rectifying bridge.
Regarding Figure 37 and Figure 38, the following should be noted:
DC Bus Voltage (VDC) Rectified Voltage (VAC)
560 3X400
680 3X480
330 3X230
The charts above are based upon theoretical worst-case conditions. Actual test results show
30% to 50% better power dissipation.
To determine if your application needs a heat sink:
1. Allow maximum heat sink temperature to be 80 °C or less (shunt down is 6 °C to 8 °C
higher).
2. Determine the ambient operating temperature of the Trombone as ≤ 40 °C.
3. Calculate the allowable temperature increase according to the following example: For
an ambient temperature of 40 °C, ΔT = 80 to 40°C = 40°C
4. Use the chart to find the actual dissipation power of the drive. Follow the voltage curve
to the desired output current and then find the dissipated power.