Vacon 500X, User Manual

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vacon vacon 500x parameters
7
501 V/Hz Select Default: Linear Fxd
Range: 0 to 7
Level 2
The V/Hz Characteristic Selection parameter determines the characteristic of the V/Hz curve and whether
any boost will be applied at starting. The following data values may be assigned:
Parameter Value Description
Linear Auto The Linear Auto selection operates the Vector algorithm and activates current
limiting functionality.
Linear Fxd V/Hz curve with the amount of boost fixed at the value set in parameter
502 (Voltage Boost).
Pump Fxd V/Hz curve with the amount of boost fixed at the value set in parameter
502 (Voltage Boost).
Fan Fxd V/Hz curve with the amount of boost fixed at the value set in parameter
502 (Voltage Boost).
Linear 2pc Activates parameters 512 (Midpoint Frq) and 513 (Midpoint Volt).
These parameters are used to define a midpoint through which the V/Hz curve passes
so a custom curve may be created for special motor applications.
Vector Activates the sensorless vector algorithm for high torque / low speed
operation. A vector-duty motor should be used for this mode of operation. Vector mode
does not use the boost parameter (parameter 502)
502 Voltage Boost
Default: 1.0%
Range: 0.0 to 50.0%
Levels 1,2
Parameter 502, Voltage Boost , increases the motor voltage at low speed to increase the starting torque of
the motor. The parameter sets the amount of boost to be applied at zero frequency. The amount of boost
ecreases linearly with increasing speed.
This parameter is used when parameter 501 is set with fixed boost options.
503 V/Hz Knee Freq Default: 60 Hz
Range: 25 to 400 Hz
Level 2
This parameter sets the point on the frequency scale of the V/Hz curve at which the output is at full line
voltage. Normally, this is set at the base frequency of the motor, but it may be increased to enlarge the
constant torque range on special motors. Setting this parameter to a higher value can reduce motor losses
at low frequencies.
MOTOR OVERHEATING
Too much boost may cause excessive motor currents and motor overheating.
Use only as much boost as is necessary to start the motor.
Failure to observe this instruction can result in equipment damage.
CAUTION
SURCHAUFFE DU MOTEUR
Une amplification de puissance excessive peut entraîner des surintensités
de courant et faire la surchauffe du moteur. N’utilisez que le niveau
d’amplification nécéssaire pour démarrer le moteur.
Si cette directive n’est pas respectée, cela peut entraîner des dommages
matériels.
ATTENTION