ElmoMC Gold Line Digital Servo Drives-Gold Trombone - Manual (Page 77)

Gold Trombone Installation Guide (EtherCAT and CAN) Installation
MAN-G-TROIG-EC (Ver. 1.604)
www.elmomc.com
77
Figure 37: Dissipation versus Current Graph for 330 VDC
4.13.3. How to Use the Charts
The power dissipation in the chart includes the losses of the rectifying bridge.
Regarding Figure 36 and Figure 37, 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 Gold 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.