Does EVS maintain it torque at very low speeds Electronic inverter for variable speed adjustment between 0-3750 rpm Is inverter just a variable voltage drawn like the dimmer on a light? and the general 25-650's motor is Motor 1 1/2 HP, 220 V, 3Ph, 5.5 A
Input power 110V, 1Ph ONLY
What does this mean? Does it start up 1 ph and go to 3 ph or will it even run on 1 ph power?
It tries, but slower speeds mean longer gaps between pulses, and coasting isn't torque.
Nope. Voltage is the same, interval not.
Means that it'll rectify and process single phase only. All the electronics are set up that way. You'd have electrons running into each other if you went to three-phase.
Hi Moray
No, you do loose some power, that's the reason why, some/most lathes will still use step pulleys, so they can use the higher power curve of the motor for lower lathe speeds
Again NO, that's why it's called "Inverter" simply put, it changes one kind of electrical power into an other kind, which than gets chopped up and fed to the motor in increasing or decreasing intervals, so the quicker the feed rate the faster the motor will run, and if you go too fast the motor will fail, go too slow and the motor will stop.
The 3 phase motor does run on 3 phase, not on 1 phase, and as we just went over that, the inverter uses the 110V 1 phase, to make the 3 phase used by the 3 phase motor. Some inverters use 110V or 220V for input, but the same 3 phase output.
Have fun and take care Leo Van Der Loo
aaah, george - that's not correct - Lee V's note does explain things well though "interval" is not the same as phase nor frequency", and a light dimmer (that the OP asked about) is of couse NOT a variable voltage unless he uses a variac - it's a duty cycle modulated sine wave.
what this all has to do with wood turning is just to untangle the VFD from other power control techniques
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