lalion
Member
Hi,
Im having noise problems from a VSD that has been installed and running fine in the current system for couple months now.
To start, the customer originally asked to have speed control of outfeed conveyor of log scanning system. Easy solution put in a VSD, because motor is on far end of conveyor and cable run (80m unshealded motor) was already in place I decided, instead of re-running Sheilded motor cable and place VSD at Control room we would mount VSD in cabinet right at the motor and wiring in to existing motor cable.
As I said, this worked perfect for 2 months, then suddenly log scanning system (located 1/3 down convayor) started playing up, we have proved that it is caused by this VSD, I feel noise must be getting back thru power cabling from vsd. Ive replaced internal Filter but no luck yet, my next option is to install external RFI Filter, but this isn't cheap and supplier wont lend me one to test with. My other option is to run sheilded motor cable back, but at 55Amps this will be more expensive.
Ive read few other noise related posts and there seems to be different types/causes of noise. I guess my question is, am I on the right path, is there any easy way to analyze?
Thanks for all advice,
Leon
Im having noise problems from a VSD that has been installed and running fine in the current system for couple months now.
To start, the customer originally asked to have speed control of outfeed conveyor of log scanning system. Easy solution put in a VSD, because motor is on far end of conveyor and cable run (80m unshealded motor) was already in place I decided, instead of re-running Sheilded motor cable and place VSD at Control room we would mount VSD in cabinet right at the motor and wiring in to existing motor cable.
As I said, this worked perfect for 2 months, then suddenly log scanning system (located 1/3 down convayor) started playing up, we have proved that it is caused by this VSD, I feel noise must be getting back thru power cabling from vsd. Ive replaced internal Filter but no luck yet, my next option is to install external RFI Filter, but this isn't cheap and supplier wont lend me one to test with. My other option is to run sheilded motor cable back, but at 55Amps this will be more expensive.
Ive read few other noise related posts and there seems to be different types/causes of noise. I guess my question is, am I on the right path, is there any easy way to analyze?
Thanks for all advice,
Leon