Nix Product Manual |
Wiring and Connections
INGENIA | 01/22/2019
64
7.3.1 AC and DC brushless motors
Brushless motors should be connected to phase A, B and C terminals. The connection diagram is shown in next
figure.
Note that some manufacturers may use different phase name conventions (see Table below).
PH_A
A
1
U
PH_B
B
2
V
PH_C
C
3
W
Phase name
Alphabetic
Numeric
UVW
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.
