NO.6 Detailed Function Description
6.8 Motor function parameters
It shall be set as per rated voltage value on motor nameplate; ex-factory value of 230V grade
inverter and that of 440V grade inverter are respectively 220 and 380.
This parameter shall be set according to rated value on motor nameplate and can be used
for limiting output current of the inverter so as to prevent over current and protect the motor;
in case that motor current exceeds this value, AC motor inverter shall provide the protection.
Number of motor poles shall be determined via this parameter which is set according to
motor nameplate.
It shall be set according to actual speed of the motor; displayed value is identical to this
parameter and can be used as the parameter used for monitoring to facilitate the user; this
set value is corresponding to the rotating speed at 50Hz.
Automatic torque
compensation
This parameter can be used to make the inverter
automatically output extra voltage during running
and to compensate the insufficient torque of motor
during low frequency. Excessive torque
compensation is inadvisable and the setting shall
be performed upward gradually based on actual
situation. Insufficient compensation shall cause
insufficient torque of the motor under low
frequency while excessive compensation shall
induce excessive torque, thus producing certain
impact on machinery and even causing inverter
tripping. As shown in the Figure 6-17 on the right.
Figure 6-17 Automatic Torque
Compensation
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