LV Variable Speed Drive for NEMA Standard Duty Motors
LV Variable Speed Drive for NEMA Standard Duty Motors
(OP)
Gents,
Typically, Inverter fed motors should have inverter duty not standard duty. However, motors for inverter service have alrealdy been purchased with NEMA standard duty not inverter duty.
So, I am looking for suppliers of LV VSD suitable for operating non-inverter duty motors.
Could you please recommend some vendors who can provide the solution for this problem?
Thanks in advance.






RE: LV Variable Speed Drive for NEMA Standard Duty Motors
RE: LV Variable Speed Drive for NEMA Standard Duty Motors
RE: LV Variable Speed Drive for NEMA Standard Duty Motors
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: LV Variable Speed Drive for NEMA Standard Duty Motors
RE: LV Variable Speed Drive for NEMA Standard Duty Motors
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: LV Variable Speed Drive for NEMA Standard Duty Motors
what do you mean by LV? Once you start getting an AC supply >460Vac then the peak-peak seen by the motor becomes harsher.>500Vac supply becomes a real problem.
As already pointed out, most PWM VFDs are similar. Other factors that will impact will be motor cable length too. Longer cables will increase the spikes seen at the motor.
RE: LV Variable Speed Drive for NEMA Standard Duty Motors
If I were you however, I would get the best VFD I can afford from a supplier I trust who has good local support, then add some quality filtering on the output to protect the motors. But it's a lot for one person to know for sure, so I tell people to look to TCI or MTE (in North America anyway) for good after-the-fact filtering products. That industry changes fast so that I would just call their applications engineers and explain what you have. They should help you get the right thing.
RE: LV Variable Speed Drive for NEMA Standard Duty Motors