How to use the charts, Bee thermal data – ElmoMC ExtrIQ Digital Servo Drives-Hornet User Manual
Page 51
Hornet and Bee Installation Guide
Installation
MAN-HRBEIG (Ver. 1.304)
51
3.15.1.3.
How to Use the Charts
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 heatsink:
1.
Allow maximum heatsink temperature to be 80 °C or less.
2.
Determine the ambient operating temperature of the Hornet.
3.
Calculate the allowable temperature increase as follows:
for an ambient temperature of 40 °C , ΔT= 80 °C – 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.
5.
If the dissipated power is below 4 W the Hornet will need no additional cooling.
Notes:
•
The chart above shows that no heatsink is needed when the heatsink temperature is 80 °C,
ambient temperature is 40 °C and heat dissipated is 4 W.
•
When an external heatsink is required, you can use the Elmo external heatsink (Catalog
number: WHI-HEATSINK-2) – see Figure 4.
3.15.2. Bee Thermal Data
The best way to dissipate heat from the Bee is to mount it so that its lower board faces
upward. For best results leave approximately 10 mm of space between the Bee's lower board
and any other assembly.