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 lters are connected.
Only use Stage 1 auto-tuning with synchronous motors (SMC or CSMC) or when output lters
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
NXGPro+ Control Manual
226 Operating Manual, A5E50491925A
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