Code Alarm F60 Installation Manual Page 66

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Motor Control Parameters
66 S1A53838 09/2011
Motor Control Mode
Constant V/Hz Mode with AutomaticTorque Boost ([Mot cont. mode sel.] (Pt) = 2)
Use parameter [Auto Torque Boost] (F402) to adjust the amount of automatic torque boost (see page 74).
If the ATV212 drive and the connected motor have the same power rating, and if the motor has a nominal
1500 rpm rating, no motor auto-tuning is required to use this motor control mode. Otherwise, follow the steps
outlined in “Motor Tuning” on page 70
.
Due to the feedback circuit used in this mode, it is possible for motor speed to oscillate. If this occurs, select the
Constant V/Hz mode ([Mot cont. mode sel.] (Pt) = 0) and adjust torque boost manually with parameter [Motor
Voltage Boost] (ub).
Sensorless Vector Control Mode ([Mot cont. mode sel.] (Pt) = 3)
Sensorless vector control mode is only for use in applications where:
z Each motor is powered by its own ATV212 drive (not for multi-motor applications).
z The motor has a power rating equal to that of the ATV212 drive, or no lower than one hp rating less.
z The motor has between two and eight poles (750 to 3000 rpm).
Sensorless vector control will not improve motor control above the motor’s rated speed.
Sensorless vector control is more effective if the motor leads are less than 30 m (100 ft) in length. If motor leads
longer than 30 m (100 ft) are required, perform an auto-tuning with the long motor leads included in the circuit.
Motor torque may not be maximized at the motor’s rated frequency due to voltage drop in the motor leads.
Connecting a load reactor or a motor filter on the output of the ATV212 drive may reduce the torque generated
by the motor in sensorless vector control mode. Auto-tuning will most likely not be possible with a reactor or filter
attached to the drive. Manual tuning will be required
0
Motor rated voltage
Motor Rated Frequency
: Automatically
adjusts the
amount of
torque boost.
Output Voltage (%)
Output Frequency (Hz)
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