Inovance MD800 Series - Harmonic Suppression; Control Circuit Interference; High-Speed Pulse Interference; Common I;O Signal Interference

Solutions to Common EMC Interference Problems
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6.2 Harmonic Suppression
To suppress the higher harmonic current of this product and improve the power
factor, install an AC input reactor on the input side of the product. This will enable the
product to meet standard requirements.
6.3 Control Circuit Interference
6.3.1 High-speed Pulse Interference
Make rectification according to the following table.
Step
Solution
1
Use the shielded twisted‑pair (STP) and ground the STP at both
ends.
2
Connect the motor enclosure to the PE of the AC drive.
3
Connect the PE of the AC drive to the PE of the grid.
4
Add an equipotential bonding wire between the host controller and
the AC drive.
5
Separate the signal cable and power cable at a distance of at least
30 cm.
6
Add a magnetic buckle to the signal cable, or wind the signal cable
on the magnetic ring for one to two turns.
7
Wind the output U/V/W cables of the AC drive on a magnetic ring for
two to four turns.
8
Use a shielded power cable and ground the shielding layer securely.
6.3.2 Common I/O Signal Interference
This product generates very strong interference. Although EMC measures are taken,
the interference may still exist due to improper cabling or grounding during use.
When the product interferes with other devices, the following solutions can be
adopted.
Step
Solution
1
Use the shielded cables as the I/O signal cables, with the
shielding layer connected to the PE terminal.
2
Reliably connect the PE terminal of the motor to the PE terminal
of the AC drive, and connect the PE terminal of the AC drive to the
PE of the power grid.
3
Add an equipotential bonding wire between the host controller
and the AC drive.
4
Wind the output U/V/W cables of the AC drive on a magnetic ring
for two to four turns.