Harmonic waves
Harmonic waves
(OP)
Are there regulations that require harmonic wave dampers or filters to be used with high power industrial lasers (6kw)?
I would like to buy one and am wondering if the manufacture is responsilbe for some sort of countermeasure or if i am.
I would like to buy one and am wondering if the manufacture is responsilbe for some sort of countermeasure or if i am.






RE: Harmonic waves
Where is you factory situated ? Standards for electrical equipment differ a lot in different countries.
What is the input power of your laser and to what voltage is it connected.
What does does the contract between you and the supplier of the laser state on that topic ?
What is the short circuit power available at the point where the laser power supply is connected ?
Can you decribe the type of rectifier used in your laser power supply ?
You should consider that harmonic problems are generally problems where the whole system and not only the component has to be considered.
You would get better answers, if you would be able to describe your problem more specific instead of posting the same question in several forums.
RE: Harmonic waves
RE: Harmonic waves
Power electronic equipment in that power range today ususally uses DC-voltage link designs. The rectifier in this type of power supply usually doesn't cause a bad fundamental power factor but causes harmonic currents.
On VFDs of the same power rating some inductors in the input line have to be used to reduce this harmonics. These inductors are usally not supplied as integral part of the drive.
Further measures might be necessary depending on system configuration.
RE: Harmonic waves
RE: Harmonic waves
My suggestion is to have an electrical engineer develop a simple one-line diagram of your electrical system including transformer sizes & impedances as well as the utility impedance data. You can then send this to the laser manufacturer and ask that he provide whatever filtering equipment is necessary to maintain the harmonic levels at the point of coupling with the utility (or wherever) within the requirements of IEEE 519. You can have the supplier assume your existing system has no harmonics, or you can measure the actual harmonics and provide this data to them.
If this is a sole source purchase, you should discuss this with the supplier and negotiate a solution. If it is a competitive bid, you need to get this requirement into the specifications.
Hope that helps.
dpc
RE: Harmonic waves
RE: Harmonic waves