How to Minimize the Interference of Frequency Drive?

Release Date:

2026-06-03 19:59

The interference of frequency drive includes:

Conductive interference: transmitted through wires and grounding wires;

Inductive interference: caused by electromagnetic induction and static induction;

Radiated interference: transmitted through wires and the frequency drive.

The solutions for interfering side (frequency drive) are as follows:

1. Conductive interference: Use input-specific interference filters, zero-phase reactors, grounding capacitors, and insulated transformers on the input side.

2. Inductive interference: Separate the input/output lines, power lines, and signal lines; use shielded cables and power line filters (common choke coils, magnetic rings), and ensure proper grounding.

3. Radiated interference: Pay attention to the installation in the control cabinet and the metal piping of the power lines.

4. Reducing the carrier frequency also has an effect.

The solutions for the interfered side are as follows:

1. If the interfered wire or object is clearly identified, deal with it accordingly;

2. If it is not clear, handle it in the following order:

A. Stay as far away from the frequency converter as possible;

B. Use shielded wires for the signal lines, and only one end of the shielded wire is connected to the common terminal;

C. You can also use magnetic rings and filter capacitors;

D. Insert power line filters (normal state choke coils, small noise filters) into the power lines;

E. Separate the grounding wires.

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