Precautions for inverter selection - Delta

Create Date: 2024-8-30 12:03:23|Source: Delta/Delta

The selection of the inverter is mainly determined by the load characteristics of the drive and the actual working current of the motor, in addition to the following precautions:

                                  Precautions for inverter selection - Delta

1. EnvironmentFor some high temperature (higher than 50 degrees) and high altitude (higher than 1000 meters) application occasions, the inverter selection should appropriately leave a certain margin to ensure the service life of the inverter and motor.

2. Distance

The distance between the inverter installation address and the drive motor is more than 50 meters, and the inverter should be selected with a reactor to reduce the carrier frequency.

3. One tow more

When a frequency converter drags multiple motors, if the cable connected in the middle is too long, the general frequency converter should be enlarged by one gear when selecting the model, and a fuse should be installed behind each motor.

4. High-speed motor

During the operation of the high-speed motor, a large number of harmonics will occur, which will enhance the output current of the inverter and generate a large amount of heat. Therefore, the inverter should also be one gear larger than the ordinary motor when selecting the model.

5. Explosion-proof motor

In some mines and oil exploitation environments, when the frequency conversion system is an explosion-proof motor, the frequency converter should be selected with explosion-proof function, and the frequency converter should be placed in a safer place.

6. Protection level

For dusty and wet applications, pay attention to the protection level of the inverter when selecting it. Maybe choose the AMB inverter, the fan can run even in water.

7. Single-phase motor

When a single-phase motor is used in the field, the inverter is useless.

8. Pole-changing motor

When the pole changing motor is used in the field, the inverter should be selected to ensure that the large working current does not exceed the rated current of the inverter, and the number of poles of the motor should be converted to avoid idling and damaging the inverter.

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