Shenzhen Hpmont Technology Co., Ltd Chapter 6 Function Introduction
HD30 Series Inverters User Manual ―83―
No. Name Description Range
factory setting
F09.07 Torque boost of motor 1 0.0
30.0
45kW and below inverter: 2.0%
55
132kW inverter: 1.0%
160kW and above inverter: 0.5%
Cut-off point used for manual torque boost of motor 1
In order to compensate the torque drop at low
frequency, the inverter can boost the voltage so
as to boost the torque.
• No matter what kind of V/f curve is set by
F09.00, the torque boost is enabled.
If F09.07 = 0, auto torque boost is enabled.
• If F09.07 is set as non-zero, manual torque
boost is enabled.
F09.08 is relative to percentage of motor’s rated
frequency (F08.03).
Slip compensation gain of motor 1
F09.10 Slip compensation filter time of motor 1 0.01
10.00
0.10s
Slip compensation limitation of motor 1
F09.12 Compensation constant of motor 1 0.1
25.0s
2.0s
The motor’s slip changes with the load torque, which results in the variance of motor speed. Through
slip compensation (the inverter will automatically adjust its output frequency according to the load
torque) to reduce the influence.
• In driving status (the actual speed is lower than the
setting speed) and in generating status (the actual
speed is higher than the setting speed), the slip
compensation gain (F09.09) should be increased
gradually.
• The value of auto slip compensation depends on the
motor’s rated slip, consequently make sure the motor’s
rated frequency (F08.03) and rated speed (F08.04) are
set correctly.
Range of slip compensation = Slip compensation limit
(F09.11) × Rated slip.
Rated slip = F08.03 - F08.04 × Np / 60.
• Np is the number of the motor pole pairs.
F09.13 Reserved
F09.08max F08.03
Voltage of manual
torque boost
F08.01
Frequency
Voltage
0
Boosted value
F09.08max = 50% F08.03
Load
Slip
Negative slip
100%
-100%
compensation
Positive slip
compensation
6
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