The basic motor parameters can be divided into the following categories:
• Nameplate data is readily available. Examples include motor rated voltage and full load
current.
• Equivalent circuit data is available only from the motor manufacturer.
– If this data is available, it can be entered into the NXGpro menu system.
– If this data is not available, either default settings or auto-tuning functions can be used.
Examples include stator resistance and no-load current. The correct equivalent circuit
data is required only when good control performance, such as high starting torque or very
low speed operation, is desired.
Auto-tuning Implementation
There are two stages of auto-tuning, each stage being selected individually.
DANGER
Electric Shock Hazard
Lethal voltages are present on the drive outputs during both Stage 1 and Stage 2 of auto-tuning.
Stay clear of drive outputs during auto-tuning to avoid death or serious injury.
CAUTION
Incorrect use of Stage 2 auto-tuning
Incorrect use will lead to drive instability.
Never use Stage 2 auto-tuning with synchronous motors or when output filters are connected.
Only use Stage 1 auto-tuning with synchronous motors (SMC or CSMC) or when output filters
are connected.
Stage 1 of Auto-tuning (ID 1260)
Stage 1 determines the Stator Resistance and Leakage Inductance. This stage of auto tuning
does not require the motor to be de-coupled from the load. The motor does not rotate during this
stage but does apply voltage. The data obtained from stage 1 is used in the inner regulators that
control motor current. The current loop gains are automatically calculated and saved by the
control.
Operating the Control
7.13 Drive Tuning
Control Manual
226
Operating Manual, A5E50491925A
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