Technosoft 2014
62
iPOS4808 MX Technical Reference
3.4.12. Power Supply Connection
3.4.12.1 Supply Connection
Figure 3.20.
Supply connection
3.4.12.2 Recommendations for Supply Wiring
Always provide a nearby capacitor on the motor supply lines. The capacitor should be located
within 10cm of the iPOS4808 connector, max. 20cm. The minimum recommended capacitance is
330µF for iPOS4808, always rated at the appropriate voltage.
Use short, thick wires between the iPOS4808 and the motor power supply. Connect power supply
wires to all the indicated pins. If the wires are longer than 2 meters, use twisted wires for the
supply and ground return. For wires longer than 20 meters, add a capacitor of at least 2,2
00μF
(rated at an appropriate voltage) right on the terminals of the iPOS4808.
3.4.12.3 Recommendations to limit over-voltage during braking
During abrupt motion brakes or reversals the regenerative energy is injected into the motor power
supply. This may cause an increase of the motor supply voltage (depending on the power supply
characteristics). If the voltage bypasses 39V, the drive over-voltage protection is triggered and the
drive power stage is disabled. In order to avoid this situation you have 2 options:
Option 1. Add a capacitor on the motor supply
big enough to absorb the overall energy flowing
back to the supply. The capacitor must be rated to a voltage equal or bigger than the maximum
expected over-voltage and can be sized with the formula:
Содержание iPOS4808 MX Series
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