Delta Electronics VFD037CH23A-21 — настройки параметров для управления частотными преобразователями [247/638]
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Delta Electronics VFD037CH23A-21 — настройки параметров для управления частотными преобразователями [247/638]

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Delta Electronics VFD450CH23A-00/-21 Руководство по эксплуатации онлайн [247/638] 460303
Chapter 12 Description of Parameter SettingsCH2000 Series
12-31
V/f Curve Selection
Factory Setting: 0
Settings 0: V/f curve determined by group 01
1: 1.5 power curve
2: Square curve
When setting to 0, refer to Pr.01-01~01-08 for motor 1 V/f curve. For motor 2, please refer to
Pr.01-35~01-42.
When setting to 1 or 2, 2
nd
and 3
rd
voltage frequency setting are invalid.
If motor load is variable torque load (torque is in direct proportion to speed, such as the load of fan or
pump), it can decrease input voltage to reduce flux loss and iron loss of the motor at low speed with
low load torque to raise the entire efficiency.
When setting higher power V/f curve, it is lower torque at low frequency and is not suitable for rapid
acceleration/deceleration. It is recommended NOT to use this parameter for the rapid
acceleration/deceleration.
0
20 40 60
80 100
100
90
80
70
60
50
40
30
20
10
01-02
Voltage %
1.5 power curve
Square curve
01-01
Frequency%
Optimal Acceleration/Deceleration Setting
Factory Setting: 0
Settings 0: Linear accel./decel.
1: Auto accel., linear decel.
2: Linear accel., auto decel.
3: Auto accel./decel. (auto calculate the accel./decel. time by actual load)
4: Stall prevention by auto accel./decel. (limited by 01-12 to 01-21)
Setting 0 Linear accel./decel.: it will accelerate/decelerate according to the setting of
Pr.01-12~01-19.
Setting to Auto accel./decel.: it can reduce the mechanical vibration and prevent the complicated
auto-tuning processes. It won’t stall during acceleration and no need to use brake resistor. In
addition, it can improve the operation efficiency and save energy.
Setting 3 Auto accel./decel. (auto calculate the accel./decel. time by actual load): it can auto detect
the load torque and accelerate from the fastest acceleration time and smoothest start current to the
setting frequency. In the deceleration, it can auto detect the load re-generation and stop the motor

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