I've powered an old 3phase planer/thicknesser through an inverter, one of those fancy units which convert 230V to 400V. It fires up ok, except for a little chatter in the starter, even the independent dual speed feed motor works. Takes about 10 sec to reach full speed but then runs smoothly, no noticeable strange sounds or vibration.
My problem is that I can easily slow down the motor under load. I've installed brand new knives and I'm taking about 1mm per pass on 100mm wide ash, yet I can almost grind it to an halt. The motor (british Crompton make) is rated 2.2kW (3HP), so I think it should be powerful enough for this task. I've done visual inspection of it but found nothing suspicious. It also doesn't get very hot, in fact the pulley was hotter than the motor.
I'm kind of lost here, is this a problem with the motor or the inverter? I reckon that if the inverter was faulty, I'd be unable to start the motor in the first place but I don't know.
Any input is appreciated.
thanks.
My problem is that I can easily slow down the motor under load. I've installed brand new knives and I'm taking about 1mm per pass on 100mm wide ash, yet I can almost grind it to an halt. The motor (british Crompton make) is rated 2.2kW (3HP), so I think it should be powerful enough for this task. I've done visual inspection of it but found nothing suspicious. It also doesn't get very hot, in fact the pulley was hotter than the motor.
I'm kind of lost here, is this a problem with the motor or the inverter? I reckon that if the inverter was faulty, I'd be unable to start the motor in the first place but I don't know.
Any input is appreciated.
thanks.