Under what circumstances do you need to increase the capacity of the inverter?
The 'increase in Inverter capacity' mentioned here is based on the ratio of the motor capacity of the inverter to the actual motor capacity.
When the rated current of the inverter is low, the rated current of the inverter is less than the rated current of the motor of the same capacity, and a larger inverter should be selected according to the load of the motor.
First, the rated current of the inverter is very low. As mentioned above, when the rated current of Some converters is less than the rated current of the same capacity motor, a large single-gear converter should be selected according to the load of the motor.
Second, the motor may be overloaded in a short period of time, because the so-called 'short-term' motor is relative to the heating time constant. Less minutes, more than ten minutes.
The overload capacity of the frequency converter is generally 150%, which is 1 minute higher than that of the motor and has no overload capacity.
Therefore, if the motor is overloaded within the think tank time, the capacity of the inverter should be increased.
Third, the length of motor acceleration time for people with special requirements for acceleration and deceleration time is a relative concept related to inertia.
For example, the acceleration time is 5S, which has a large inertia (GD2)The load may be too short; However, with a small inertia (GD2 small)The load can be too long.
Generally, for loads that need to be started and stopped under heavy load conditions, consider increasing the capacity of the drive under the following conditions :(1)Requires quick start and stop; (2)Flow frequently.
4. Those with impact loads, for example, the motor and the load are combined by a clutch.
Normally, the load is also rotated due to the joint of the clutch in the motor's already rotating state.
Obviously, when the clutch is just joined, the speed of the motor will decrease, the sliding will increase, the current will also increase, and the overcurrent protection action can be caused. In this case, the capacity of the inverter should be increased