Where the inverter filter is suitable - Schneider

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

1. LC filter

LC filter is suitable for occasions with low requirements for harmonic content, and a good LC filter can control the distortion rate at 8-10%;

Where the inverter filter is suitable - Schneider

Where the inverter filter is suitable - Schneider

2. Harmonic filter

This kind of filter is suitable for occasions with high harmonic requirements, and the distortion rate can generally be controlled at 2-5%;

3. Sine wave filter

This kind of filter combines the advantages of reactor and LC filter, can integrate the waveform of the output end of the inverter into a standard sine wave, and at the same time, can also solve the problem of voltage drop caused by long-distance transmission between the inverter and the load;

Selection

1. Clarify the required working parameters

The first step is to clarify the rated operating voltage, current, and frequency of the equipment.

The rated current of the inverter filter should not be too small, otherwise it will damage the filter or reduce the life of the inverter filter. However, the rated current should not be too large, because the current will increase the volume of the inverter filter or reduce the electrical performance of the inverter filter. Generally, the rated current of the inverter filter is determined by 1.2-1.5 times of the rated current of the equipment.

2. Determine the appropriate type of inverter filter

In different occasions, the requirements for current or voltage distortion rate are different, and different inverter filters are selected according to their requirements.

3. Clarify the type of interference

According to the situation of the interference source in the field of the equipment, the type of interference noise is determined, whether it is common mode interference or differential mode interference, so that the inverter filter can be selected in a targeted manner. If the type of interference cannot be determined, the inverter filter model can be determined by practical experimentation, which is often a practical and effective method.

4. Leakage current

The inverter filter is selected according to the allowable value of the high leakage current of the device, especially for some healthcare equipment.

use

1. The installation position of the inverter filter should be close to the inverter to shorten the lead length as much as possible.

2. Make sure that the inverter filter shell is in good contact with the chassis shell.

3. The input and output lines of the inverter filter should be separated from each other, and the lines should not be walked together, so as not to reduce the electrical performance of the inverter filter.

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