Issue 1.5
Q-Drive Installation Manual
Copyright © 1996 Quin Systems Ltd.
Page 27
5.5
Connecting the motor to the drive
A typical brushless A.C. motor is connected with two cables; one carries the power to
the motor windings, and the other returns signals from a position or speed feedback
device such as a resolver to the drive for positional speed sensing. The motor should be
connected using cables as specified by the manufacturer. These cables usually have a
strict specification with regard to size and length of motor connections.
In general though...
•
Do not tie the motor cable and resolver cable together, or run them together in
the same conduit or cable duct. The motor cable can carry high currents in
normal operation, and the resolver cable carries low voltage signals back to the
drive. The correct performance and accuracy of the motor and drive depend on
the quality of the resolver signals.
•
Do use a screened cable with individually screened twisted pairs for the resolver
signals from the motor to the drive. This prevents crosstalk and noise interfering
with the resolver signals, and gives the best performance.
•
Recommended cable for motor drive power:
RS part number
379-198
Recommended cable for Resolver or Encoder:
Heidenhain cable part number
200-775-02
(Formerly part number 2449-5501)
