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The load is too heavy, and the torque is not enough. Increase torque boost value
in V/F mode. If not working, switch to auto torque boost mode, and the motor
parameters should be in consistent with the actual value. If still not working,
switch to flux vector control mode, and check the motor parameters and actual
values to see if they are matched, meanwhile tune the motor parameters.
Mismaching of motor power and driver power. Set the motor parameters at
actual value.
One driver for several motor. Please change the torque boost mode to manual
mode.
The motor can rotate, but speed
regulation can’t be realized.
Improper setting of upper and lower limit of frequency
The frequency is set too low, or the frequency gain is set too low.
Check whether the speed adjustment mode is in consistent with frequency
setting.
Check whether the load is too heavy, whether it is in overvoltage stalled state or
overcurrent limiting state.
Speed changing during motor
running
Frequent fluctuation of load. Decrease the changing.
Serious mismatching of rated value of the driver and motor. Set the motor
parameters as actual value.
Frequency setting potentiometer is in bad connect or the frequency setting
signal is in fluctuation. Switch to digit setting mode or increase filter time
constant of analog input signal.