radarray- why do you think that same equation T=(5252 x HP)/rpm does not work for 3600rpm motors when you reduce a speed?
Per Lincoln motors company diagram for VFD: in frequency range from 0 to 60hz - motor has A constant torque range while HP range has changed from 0 to 100% or proportionally...
The normal operating speed 2500rpm I need to provide specific torque, which give me needed pressure on air compressor output. If motor will run at 150% frequency or 90hz the torque at full load will only, as you said, 66% of torque I need to keep my pressure at rated level, wich means
I have to...
electricpete - where can I find the article you have mentioned "Optimum Pole Configuration of AC Induction Motors Used on Adjustable Frequency Power Supplies"?
Thanks.
Thanks to All.
I had the same opinion, as Lewish & supporters, and now received your confirmation.
On wired1 question about constant torque for air compressors.
Constant torque on motor shaft mantains constant pressure,
for example, 125psi or, say, @100hp provides 450cfm of air
@125psi. If VFD...
Hello,
we are going to use AC 15 to 60 Hz Constant torque inverter duty motors w/VFD for for rotary screw air compressors.
Motors: from 50hp to 250hp. Lincoln motors company offers 2 pole motor 3600rpm - max 3600rpm and 4 pole motor 1800rpm -
max 3600rpm. Power supply -460v/60Hz.
Full air...
