Best E5 Series User Manual page 132

Chapter 5 Specification of Parameters
proportion set by P31.18 to obtain drive output voltage. See P31.18 for details.
P31.01 V/f frequency value f3
P31.02 V/f voltage value V3
P31.03 V/f frequency value f2
P31.04 V/f voltage value V2
P31.05 V/f frequency value f1
P31.06 V/f voltage value V1
P31.07 V/f frequency value f0
P31.08 V/f voltage value V0
P31.01~P31.08 is used for broken line V/f mode. Voltage value 100% corresponds to rated
voltage of motor. Please rationally set the values of frequency and voltage at knees on the
basis of characteristics of motor and load. Improper setting may rise output current even burn
the motor.
P31.09 Torque boost
Under V/f pattern, output voltage at low frequency can be compensated by this parameter,
improving the torque output. 0.0% corresponds to automatic torque boost, and drive output
voltage is automatically compensated via detection of load current. Automatic torque boost is
valid only for linear V/f pattern.
100% of torque boost corresponds to rated voltage of motor. A non-zero value means the
output voltage rises on the basis of V/f curve and this takes effect at parameter values 0~6 of
P31.00. It is suggested this parameter value be gradually increased from zero until the starting
requirement is met. Boost value is not suggested to be set to a relatively big one, as it is likely
to bring about a bigger drive current and higher motor temperature.
Torque boost diagram is shown in Fig. 5-38:
Range: 0.00Hz~rated frequency
of motor
Range: 0.0%~100.0%
Range: P31.05~P31.01
Range: 0.0%~100.0%
Range: P31.07~P31.03
Range: 0.0%~100.0%
Range: 0.00Hz~P31.05
Range: 0.0%~100.0%
Range: 0.0%~30.0%
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E5 User Manual
Factory default:
50.00Hz
Factory default:
100.0%
Factory default:
0.00Hz
Factory default:
0.0%
Factory default:
0.00Hz
Factory default:
0.0%
Factory default:
0.00Hz
Factory default:
0.0%
Factory default:
0.0%