Function Application
‑587‑
3.4.10Improving Performance of Field-Weakening Range
Para.
No.
Function Default
Value Range Description
F2‑21
Maximum output voltage
coefficient
105%
100% to
110%
Indicates the boost capacity on the basis of maximum
voltage of the AC drive.
Increasing F2‑21 improves the maximum loading
capacity in motor field‑weakening range, but increases
motor current ripple and motor temperature.
Decreasing F2‑21 weakens the maximum loading
capacity in motor field‑weakening range, but reduces
motor current ripple and motor temperature.
Generally, this parameter needs no adjustment.
3.4.11FVC Running and Performance Improvement
Table 3–26 Brief procedure for setting the speed control mode in FVC mode
Procedure
Para.
Description
Check the AC drive wiring.
‑
If the AC drive reports E19.00 during
motor auto‑tuning, check whether the
AC drive wiring and motor parameter
settings are correct.
Set motor parameters. F1‑01, F1‑02, F1‑03,
F1‑04, F1‑05
Set the encoder type and
pulses per revolution.
F1‑27, F1‑28
If the AC drive reports E20.00, check
whether the encoder and PG card are
working properly.
Select a control mode.
F0‑01
‑
Perform the motor auto‑
tuning.
F1‑37
Dynamic auto‑tuning on all
parameters of the asynchronous
motor takes some time. Wait until this
process is completed before
proceeding to the next step. Dynamic
auto‑tuning on all parameters of the
asynchronous motor is recommended
(set F1‑37 to 2). Before performing
auto‑tuning, remove the load from the
motor so that the motor can reach a
high speed. If the load cannot be
removed from the motor (for example,
motor of a crane), use static auto‑
tuning on all motor parameters (set
F1‑37 to 3).
Set the command source
and frequency reference
source.
F0‑02, F0‑03
‑
Perform a trial run.
A0‑00 = 0
‑
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