I more hopeful that the 2 pole - 4 pole rewind/wire is possible now.Sparky Brother wrote:acmotor wrote: TJ, the pic won't download.....
Ah, fresh air, no more 2 pole talk !!!
I have recently done lots of thinking how to go around my 2 pole (sorry acmotor ) motor problems and basically got through anything one can come up with; Keeping the car`s gear box? Nah! Too much labour if I want to do it right and install a working clutch.
Get an auto GB, get rid of the torque converter and actuate the clutches by a separate pump/controls or use electrical actuators. Too much labour again!
Not to mention the crazy ideas on hydraulic Pump/Motor set up - too dirty!
All right just to warm Johny and Woody`s hearts - Yesterday I spoke to someone at WEG (my 2P one is WEG) about a possible rewinding to 4 pole. Unfortunately to me this guy was either too lasy to think or not that knowledgible so the answer was more like - Mmm? I don`t think there will be any benefit out of that. At least he gave me the phone of a guy from their distributor company that might know the stuff better
I got a quote (thanks again to Weber) for a 132-316-HSE (h = foot + flange, s = star IE 400v star/ 230 delta) it was $1000 delivered.Sparky Brother wrote: Apart from that I spoke to my good friend Lona from Mark Air (they have account with ABB) to get me a Quote on a M3AA112MB3GAA132 316-ADE 15 kW 4 pole aluminium motor and hopefully it will be able to afford it.
that formula is also expressed as kW = Nm * RPM / 9550 and is just the relationship between torque, rpm and power. Your controller puts out amps and Volts which are required for torque and speed, but a 20kW controller won't put out 20000 amps at 1 volt, nor will a normal 20kW motor put out 200000 Nm at 1rpm, unfortunately.Sparky Brother wrote: Meanwhile today I crunched some numbers just for the fun of it and came to the "brilliant" conclusion that
since the torque of a motor is derived from this formula: T= (60 x watts):(2 x 3.14 x RPM) If I forget for a minute about the limitations of the controller and probably other factors it would be theoretically possible to squeeze out 95.5Nm @ 400V 25 Hz off the same 2P motor that normally gives you 47.7Nm @ 50 Hz.
Sparky Brother wrote: Now I just wander since the enemy here will be the Inductive reactance of the windings would it be possible to engineer a bank of capacitors that gets switched on at certain frequency reducing the Inductive reactance and producing more torque at pull out.
This is probably another not well supported theory of mine. Any way anything you guys think about it, shoot it! This is my way of learning
Yes I Realize 95.5 Nm is not enough this is why I came up with the crazy theory about the interim PF correction
You can feed more volts and amps at low rpm to get more torque (Danfoss torque boost) but this is at the expense of efficiency and you need to have spare amps to do it.
I don't think capacitors between motor and controller will help.
Repost to your feroza thread with motor and controller specs an batteries and I'll run some numbers if Johny doesn't beat me to it