Aerotech Ndrive HPe 10, Hardware Manual

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22 Chapter 1 www.aerotech.com
1.2.2. Power Dissipation
The amplifier power dissipation under continuous power supply and output current conditions is shown in
Figure 1-3 . The values on the graph represent the peak current that the amplifier would provide during
operation. When the bus voltage and output current are known, the amplifier power dissipation is found using
this graph.
Figure 1-4 shows the maximum recommended ambient temperature as a function of amplifier
power dissipation. Use this graph along with the power dissipation obtained from the first graph to determine
the maximum ambient temperature. If the result is lower than the known operating ambient temperature,
additional measures are required to cool the Ndrive HPe 10/20/30. Mounting it to a large metal plate for extra
heat-sinking and providing additional fan flow are suggested.
Figure 1-3: Power Dissipation vs. Output Current
Figure 1-4: Ambient Temperature vs. Power Dissipation
EXAMPLE:
320 VDC Bus operation at 5 A
Power Dissipation = 47 Watts
Maximum Ambient Temperature = 54°C
Ndrive HPe 10/20/30 Introduction