Frequency converter acceleration time parameter setting - Database & Sql Blog Articles

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The acceleration time parameter setting of the inverter is generally based on the following two aspects:

1. Inertia of the dragging system In the process of increasing the output frequency of the inverter, the speed of the motor rotor can only limit the current during the acceleration to the allowable range if it can keep up with the frequency increase. and so:

(1) If the inertia is larger, the beaming time should be longer.

(2) The acceleration time of the less inertia can be shortened appropriately;

2. The production machinery has different requirements on the acceleration and deceleration time. The requirements for the acceleration time are also different. The examples are as follows:

(1) For machines with frequent starting and braking, the acceleration process of the drag system is a transition process that does not perform production. Therefore, from the perspective of improving labor productivity, it is required to minimize the acceleration time and deceleration time. For example, the paint conveyor belt is repeatedly operated in a reciprocating manner, and the starting and braking are relatively frequent. In order to increase labor productivity, it is required to shorten the acceleration and deceleration process as much as possible.

(2) Production machinery that is partially and braked infrequently. Due to the actual production requirements, it is desirable to minimize the change in speed during the acceleration and deceleration. For example, glass conveyor belts operate for long periods of time during production, with few starts and brakes. On the other hand, during the starting and braking process, and during the adjustment of the speed, if the acceleration is too large, it is easy to dump the glass, so the acceleration and deceleration time is required, and the preset is longer. For example, the pump is started and manufactured. During the movement, if the rotation speed changes too fast, the water hammer effect is easy to occur. Therefore, it is also required to preset the acceleration and deceleration time to be longer.

Therefore, in the preset acceleration time, it is necessary to consider the requirements of the production machinery for the transition process, and also pay attention to the size of the inertia of the drag system to make appropriate presets.