Ground Fault Interrupter Is Actuated When Inverter Is Started; Mechanical System Makes Noise - Omron SYSDRIVE 3G3EV SERIES User Manual

5-2-11 AM Radio Receives Noise when Inverter is
Started
Noise derives from Inverter switching.
Take the following actions to prevent noise:
Reduce the carrier frequency of the Inverter.
The number of internal switching times is reduced, so noise can be reduced to
some extent.
Install an input noise filter.
Install an input noise filter (3G3IV-PHF) on the power input side of the Inverter.
Install an output noise filter.
Install an output noise filter (3G3IV-PLF) on the output side of the Inverter.
Use metal box and piping.
Metal can block off radio waves. Therefore, enclose the Inverter with a metal
(steel) box to prevent radio waves from being emitted from the Inverter.
5-2-12 Ground Fault Interrupter is Actuated when
Inverter is Started
Leakage current flows through the Inverter.
Because switching is performed inside the Inverter, a leakage current flows through
the Inverter. This leakage current may actuate the ground fault interrupter, shutting the
power off.
Use a ground fault interrupter with a high leakage-current detection value (sensitivity
amperage of 200 mA or more, operating time of 0.1 second or more) or the one with
high-frequency countermeasures (for Inverter).
Reducing the carrier frequency value is also relatively effective.
Note also that a leakage current increases in proportion to the cable length. Normally,
an approximately 5 mA leakage current is generated per meter (cable length).

5-2-13 Mechanical System Makes Noise

The carrier frequency and the natural frequency of the mechanical system resonates.
Take the following actions:
Adjust the carrier frequency.
Adjusting the carrier frequency (n37) may prevent resonance from occurring.
Install vibration-proof rubber.
Install vibration-proof rubber on the motor base.
Chapter 5