ABB ACS880 - Motor Voltage Control; Settings and Diagnostics

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Settings and diagnostics
Parameters: 31.200 Sync loss status word, 31.201 Sync loss supervision, 31.202
Sync loss minimum detection limit, 31.203 Sync loss sample period, 31.204 Sync
loss cos phi filter time, 31.205 Sync loss cos phi drop, 31.206 Sync loss cos phi
minimum level.
Events: D213 Out of sync, D113 Out of sync
Motor voltage control
The Motor voltage control function monitors voltage control settings.
In step-up applications, motor control is complicated with sophisticated electrical
circuit between drive and motor. Incorrect voltage settings and varying load might
result in less than optimal motor performance, excessive current feed and ultimately
- premature insulation wear.
If the original motor voltage settings are slightly incorrect, then the voltage profile
can be adjusted when the motor is running.
ESP control program provides three options of how motor voltage can be
optimized:
1. Energy optimization function (enabled by default) can manage the voltage
control automatically.
• Using the electrical circuit model and motor current measured on output
phases, the function attempts to find optimal operating point.
• Energy optimizer even handles well situations when load conditions are
rapidly changing. When the function is enabled, the motor current estimate.
• Produced by the control program provides more reliable indication about
true mechanical load on the motor.
2. User custom U/f curve (with voltage reference).
• In case load profile is not a subject to change, the voltage control profile
can be set with additional voltage, manually at different speeds.
• User can define voltage correction at eight custom speed points.
• The curve values can be adjusted on the fly.
• Works only if energy optimizer is disabled.
3. User custom U/f curve (with flux reference)
• In case load profile is not a subject to change, the voltage control profile
can be set with additional flux, manually at different speeds.
• User can define flux correction at eight custom speed points.
• The curve values can be adjusted on the fly.
• Works only if energy optimizer is disabled.
62 ESP program features