Radio interference prevention

2016-09-13

If confirmed. The inverter interference is strong, affecting the normal work of other equipment, please reduce the carrier frequency in a reasonable range

If the motor is noisy and abnormal and invalid when the carrier frequency is reduced, the measures can be taken according to 1-4. (sometimes more than 2 measures should be taken when the cause is complicated).

1 inverter itself direct radiation.

Measures：

1) put the frequency converter on the metal box. The metal box is as large as possible, the ground wire should be short.

2) with special grounding wire.

2 the main circuit of the power supply has become an antenna.

Measures：

1, in order to reduce the interference of the main circuit, the filter is more effective.

3 frequency converter and the electric wire between the antenna, radiation electromagnetic wave.

Measures：

1) the cable adopts four core wire (the ground wire of the 1).

2) scattered line wire stranding.

3) with the metal sleeve pipe and grounding.

4 cover the cable with cement.

5) the output filter.

4 frequency converter and motor grounding wire into the antenna, radiation electromagnetic wave.

Measures：

1 cable with four cores, and the other is grounded wire (1).

2) keep the machinery away from the ground wire (above 10m).

3) with the metal sleeve pipe and grounding.

4) grounding wire with chain casing to keep the effect.