Nix Product Manual |
Product Description
INGENIA | 01/22/2019
15
Following figure shows the basic power flow and losses in a servo drive system.
4.4.1 Power losses calculation (heat dissipation)
Operation of the Nix causes power losses that should be transferred to the surrounding environment as heat. Heat
dissipation depends on various parameters. Principally:
•
Motor RMS current
: positive correlation.
•
DC bus voltage
: positive correlation.
•
NIX product number
: 170 V variant NIX-5/170 has different power transistors compared to the 48 V variants.
The 170 V variant have greater power losses for a given motor current. Different charts are provided for each
variant, see below.
Other less relevant parameters affect also the power loss but are not considered in the graphs:
• Air temperature, higher power semiconductor temperatures reduce their efficiency.
•
Motor speed. Faster motor speeds result in higher overall power loss since the input current is greater. This
increases conduction losses on the reverse polarity protection circuitry.
Some parts of the Nix exceed 105ºC when operating, especially at high load levels.
Do not touch the Nix when operating
and wait at least 5 minutes after turn off to allow a safe cool down.
