Modern AC frequency drives actually generate “noise” – electrical harmonics and transients that can affect other electrical components. Maxson uses proven grounding methods to minimize noise associated with drives. Among the standard designs employed by Maxson in their dual motor drive retrofits:
- Inclusion of an isolation transformer between the main line and the electrical cabinet to prevent faults caused by power spikes.
- Mounting line reactors between the drive and its associated breaker. The line reactor prevents noise generated by the AC drive from flowing back to other drives.
- Use of VFD (variable frequency drive) shielded cable from the drive to the associated motor. Since dual motor drives use encoders for positioning of the motors, shielded cable should be used between the encoder and the drive also to avoid noise transmission.
