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Chapter 6 Parameter Description
67
Effect of the torque boost function: Upon the vector control 1, when the inverter operation at
low-frequency, increase the output voltage, and offset the stator voltage drop to product enough torque,
so as to ensure the normal operation of the motor.
Note:
The torque boost amplitude should be set according to the load situation. Excessive boost will
cause large current impact during the startup process.
When P0.16 is set as 0.0, and P4.00 is set as 0 (linear V/F curve), the automatic torque boost
mode is enable; when P4.00 is set as a non-zero value, the automatic torque increase mode is
disabled.
6.2 Main and Auxiliary Reference Parameter (Group P1)
In process open loop control mode (P0.03=0 or P0.03=4), the main reference value f
m
will be added with
an auxiliary reference value f
a
, and it results in process open loop combination frequency reference f
com
.
P1.01
f
m
f
a
f
com
Fig.6
−
3 Open loop main and auxiliary reference combination
The process open loop auxiliary reference mode P1.00 is selected as follows:
0: none; 1: AI1; 2: AI2; 3: AI3; 4: DI
Such calculations as “add”, “subtract”, “bias”, “max” and “min” are available for main reference value f
m
and auxiliary reference value f
a.
Through the setting of parameters in group P6, the frequency change range of the auxiliary reference
can be reduced to realize the fine tuning function.
The process open loop reference main and auxiliary relation calculation parameter P1.01 is defined as
follows:
0: Main ref auxiliary reference: The auxiliary frequency reference value is superimposed on the
main reference, the function is “add”.
P1.00
0~4(0)
P1.01
Open loop reference main and auxiliary relation
calculation
0~5(0)
Open loop auxiliary reference mode
