Converting WM Induction motor to SPM or IPM

[AEM]

Is it feasible to use the stator from this a Zanussi 300hz 17500rpm induction motor and replace the rotor to make an Inrunner motor, either SPM or IPM? The motor would be controlled by a Lebowski controller once I purchase the parts and assemble it.

 

[AEM]

The motor looks like this.

http://m.ebay.com/itm/152222667771?_mwBanner=1

 

[major]

Is it feasible to use the stator from this a Zanussi 300hz 17500rpm induction motor and replace the rotor to make an Inrunner motor, either SPM or IPM?

Hi AEM,

It is possible; feasible? Depends on your abilities, skills, resources, etc. Big question is why. It sure seems like the resulting motor would be a very poor fit for an ebike. Two pole motors typically don't yield good torque density or high efficiency.

Regards,

major

 

[fechter]

It looks just like the motor on my washing machine. On my washer motor, it is a 3 phase induction motor, so yes, it could be converted to permanent magnet. Car alternators are similar. Most of those motors are wound for AC line voltage, so don't expect it to work well at much lower voltage unless you re-wind it.

 

[AEM]

I would mainly use the motor for its stator steel seem it seems to run at 300hz. The stator would be rewound for a lower voltage and a new rotor would be made to run it as an Inrunner Permanent Magnet Motor.

 

[spinningmagnets]

How timely...I was just reading about "universal" motors. Found on corded tools like drills and circular saws. Also as mentioned, found in washing machines. Once I read that they will run off of AC or DC, I connected my 52V pack to the prongs of a 120V AC corded drill. It worked, and it spun at half-RPMs, as could be expected.

My question is then about washing machine motors as a non-hub. is there some wizardry I would have to learn to run it, controller-wise? Or...do I just need to run it at 24S, using the stock washing machine controller??

OP...Otherpower.com (and their fieldlines forum) showed various builders converting every motor/alternator under the sun to permanent magnet generators (to be run by water or wind)...

 

[major]

The subject motor is a 2-pole induction motor presumably designed to run at 300Hz, 18kRPM minus slip at mains voltage rectified and inverted to get high freq. Rewind to lower voltage, o.k. But what about freq/pole count. Like I've said, 2-pole motors are uncommon for battery powered vehicles for good reason. Changing pole count on a rewind is likely to be far from optimum on lamination inasmuch as back iron, slot count and tooth proportions. You probably can find other motors with more suitable stators.

major

 

[fechter]

I'm not so sure it would be a 2 pole motor. Those typically run at 60hz and use a big run capacitor and go slow. Most of the new ones are really 3 phase and use a VFD to power it. I'm real impressed with the performance of my washing machine motor. It can run super slow and gradually speed up to max spin speed which is really fast.

If the motor was rewound for lower voltage, you could run it with a sensorless controller or add hall sensors.
They make lower voltage VFDs for golf carts, etc. if you wanted to keep it an induction motor.

Universal motors have brushes and wound stator coils. Different animals than this.

 

[major]

... 300hz 17500rpm induction motor ...

That, assuming it is a motor specification, defines 2-pole.

 

[liveforphysics]

You could certainly make something that turns, but if the tooth head isn't precisely designed to work with the magnet or IPM rotor the motor will suck and not be worth your time to hack together.

 

[AEM]

If the WM stator might not make a good motor what motor would be a good choice for an e bike? It would be run at least 72 volts DC nominal.

 

[Punx0r]

A bicycle hubmotor?