Appendix A
119
If you are unsure of which settings to use for your motor, start with the setting
shown above for the OEM3401 motor. If the motor gets hot when it is stopped,
reduce the loop gain setting (DIP SW2 — #4, #5, #6).
The DIP switch settings shown above will enable foldback—after approximately
three seconds at full current, the drive will fault due to foldback. These settings will
help protect your motor while you prototype your system. To disable the foldback
fault, to adjust time until foldback, or to disable foldback entirely, adjust the DIP
switches.
If you have further questions, first consult your motor vendor to obtain a full and
complete motor specification sheet. Consult your Automation Technology Center
(ATC) if you have questions regarding the use of a non-Compumotor motor with
Compumotor equipment. If you still need further information, call Compumotor's
Application Engineering Department at 800-358-9070.
Connecting Motor Phase Wires and Hall Effect Wires
If you use a motor from another vendor, obtain information from the motor’s
manufacturer about its phase wire color code, sequence of Hall states, commutation
scheme, etc. Use the information below for guidance on how to connect your
motor's phase and Hall wires to the TQ10X.
Improper Wiring Can Result in Poor Performance
Assume that you arbitrarily connect your motor’s three Hall wires to the TQ10X’s
Hall inputs. For any particular Hall wiring pattern, there are six different ways you
can connect wires to Phase A, Phase B, and Phase C.
Of these six possible phase wiring combinations, only one will work properly.
Three will not work at all. The other two deserve particular attention: if the motor
is wired in one of these two configurations, the motor will turn, but its performance
will be severely impaired.
How can you tell if your motor is wired improperly? If it is in one of the two poor-
performance configurations, its torque will be much lower than the torque level of
a properly wired motor. Also, torque ripple will be very pronounced as the motor
turns.
The best way to determine whether or not your motor is wired correctly is to find
the three wiring configurations that enable the motor to turn. Compare the motor’s
torque in each configuration. The configuration with the most torque will be the
proper configuration.
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