Triton Go Product Manual |
Wiring and Connections
INGENIA | 05/29/2017
60
7.3.2 DC motors and voice coils actuators
DC motors and voice coil actuators are connected to phase A and phase B terminals. Phase C terminal is left
unconnected.
Common-mode choke
In order to minimize EMI that can affect sensitive signals, the use of a
motor choke
is recommended.
The objective of the motor choke is to
block the common mode current
to the motor and cables.
While using a separate choke for each phase could also work, the EMI reduction would be much lower
than passing all the phases through the same choke.
Proper three-phase motor choke wiring
In order to minimize the capacitive coupling of the motor wires, and therefore cancelling the effect of
the common mode rejection effect, the choke has to be properly wired.
•
An excessive number of turns causes a high capacitive coupling. Only 2 or 3 turns per motor
phase are recommended.
•
For reducing the coupling between phases, space the phases 120º apart.
Start each phase wire
in the same rotating direction
, wrapping all phases clockwise or anticlockwise. This will add
the common mode flux and increase its impedance.
