Vicruns 2S-0.4G-B, User Manual

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Chapter 9 Troubleshooting and Countermeasures
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Note:
The inertia of the drive system is equal to the motor inertia plus the load inertia.
The inertia of the motor is proportional to the mass of the motor and the square of
the diameter of the motor; the inertia of the transmission load is proportional to the
mass of the load and the square of the diameter of the transmission wheel; if the-
re is a deceleration or speed-up device, the inertia is proportional to the speed-up
ratio and inversely proportional to the deceleration ratio .
For loads with large inertia, if fast speed response is required, the integration time
needs to be reduced, but it is easy to cause speed overshoot, resulting in overv-
oltage of the inverter, and a discharge device is required to discharge. If there is
no discharge device, the integration time can be increased.
9.3.3 Adjust the PI parameters of the current loop (under normal circumstances,
do not need to adjust)
Under normal circumstances, increasing the proportional coefficient and the inte-
gral coefficient will speed up the current response speed, but if too large, it will
cause speed shock (specifically, the motor does not rotate, or rotates in random
directions, and emits high-frequency electromagnetic noise at the same time). If
you need to adjust it, first Adjust the proportional coefficient, and adjust the integ-
ral coefficient if the effect is not satisfactory. The PI parameters of the current
loop are related to the motor stator resistance, inductance, carrier frequency of
the system, and current sampling filter time. When the carrier frequency of the
system remains unchanged, the proportional coefficient is proportional to the ind-
uctance, and the integral coefficient is proportional to the resistance. Therefore,
by identifying The output parameter can roughly determine the adjustment dire-
ction of this parameter.
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