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Gemini GT6 Hardware Installation Guide
Commands for Configuration
If you use a non-Compumotor motor, you must configure the drive for your motor
by setting values for all commands in the following table. Also see the Motor
Parameters table on the Motion Planner CD-ROM for examples of recommended
drive configuration settings for Compumotor motors.
Commands for Motor Configuration
Command Description
DMTSTT static torque
DMTIC continuous current
DMTIND inductance
DMTRES phase resistance
DMTJ rotor inertia
DPOLE number of pole pairs
DIGNA* current loop gain
DIGNB* current loop gain
DIGNC* current loop gain
DIGND* current loop gain
*See the
Gemini Series Programmer's Reference
for instructions on calculating DIGN
values
Use Motion Planner or Pocket Motion Planner to enter these command settings
into the drive’s memory.
Motor Requirements
We recommend that you use Compumotor motors with the Gemini drive. If you
use a non-Compumotor motor, it must meet the following requirements:
• Inductance: minimum: 0.5 mH
recommended: 5.0 – 50.0 mH
maximum: 100.0 mH
• A minimum of 500VDC high-pot insulation rating from phase-to-phase and
phase-to-ground.
• The motor must be designed for use with a bipolar drive (no common center tap).
• The motor must not have riveted rotors or stators.
• Do not use solid rotor motors.
• Test all motors carefully. Verify that the motor temperature in your application is
within the system limitations.
The motor manufacturer’s maximum allowable motor
case temperature must not be exceeded.
You should test the motor over a 2-to-3
hour period. Motors tend to have a long thermal time constant, but can still
overheat, which results in motor damage.
CAUTION
Consult your motor vendor to verify that your motor meets the above specifications.
Consult your Automation Technology Center (ATC) if you have questions regarding
the use of a non-Compumotor motor with Compumotor equipment.
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