JRoss
Lifetime Supporting Member
Hi everybody. I have a customer with four 350HP Mitsubishi VFDs, each driving four 25HP motors. Each drive has a line reactor on the output side (between the VFD and the four motors) and a DC Reactor.
The system is a pavement testing rig and the 16 motors drive the rig up and down a track. One of their engineers contacted me because they upgraded some of their data acquisition equipment and are now seeing noise on some of the sensor lines whenever the rig is moving.
The old DAQ system had integral low pass filters where the new one does not, and they suspect that may be why they are now seeing the noise. However, they want to know if there is a way to reduce or eliminate the noise at its source before adding filters back in, as these could degrade the quality of the data they are collecting.
So my specific questions:
1. Would installing a line reactor on the input side of the drive help?
2. If I install an input line reactor, can I leave the DC reactor in place?
3. Are there any other suggestions for reducing the noise produced by the drives?
Thanks,
Jeremy
The system is a pavement testing rig and the 16 motors drive the rig up and down a track. One of their engineers contacted me because they upgraded some of their data acquisition equipment and are now seeing noise on some of the sensor lines whenever the rig is moving.
The old DAQ system had integral low pass filters where the new one does not, and they suspect that may be why they are now seeing the noise. However, they want to know if there is a way to reduce or eliminate the noise at its source before adding filters back in, as these could degrade the quality of the data they are collecting.
So my specific questions:
1. Would installing a line reactor on the input side of the drive help?
2. If I install an input line reactor, can I leave the DC reactor in place?
3. Are there any other suggestions for reducing the noise produced by the drives?
Thanks,
Jeremy