Motors without Magnets? What???

[VoKuS]

http://www.integratedsoft.com/papers/techdocs/tech_6mx.pdf

I did not even know this was possible until I ran in to this pdf by accident, apparently you can make a motor with out magnets...

They call it a "VARIABLE RELUCTANCE BRUSHLESS D.C. MOTOR" ...

I am very bad with electricity and electro magnetic s...

Any one know if this type of motor would help with the E-Bike Community?

I am a CNC machinist, so if you have a design, I can machine it!

 

[olaf-lampe]

http://www.integratedsoft.com/papers/techdocs/tech_6mx.pdf

I did not even know this was possible until I ran in to this pdf by accident, apparently you can make a motor with out magnets...

They call it a "VARIABLE RELUCTANCE BRUSHLESS D.C. MOTOR" ...

I am very bad with electricity and electro magnetic s...

Any one know if this type of motor would help with the E-Bike Community?

I am a CNC machinist, so if you have a design, I can machine it!

You can also search for switched reluctance motors. It's a well known design, but the controllers are a bit tricky. Otherwise the motor is pretty loud.
You could build the SR motor with a CNC'd solid iron core, but laminations are much better.

-Olaf
BTW: induction motors don't have magnets, too

 

[Miles]

See also: http://www.endless-sphere.com/forums/viewtopic.php?p=257497#p257497

 

[amberwolf]

You can also simply use a field coil instead of a magnet for any regular permanent-magnet DC brushed motor, turning it into what is commonly known as a "universal" motor.

As long as it has the properties of magnetism necessary to do what a magnet does, you can make the motor anyway you want.

 

[apullin]

Aren't motors like this just usually lumped together as "stepper" motors? That how I learned it. Then some steppers have a permanent magnet in them, and are called "hybrid steppers".

Actually, come to think of it, you could just use a BLDC motor as a "stepper", too ...

 

[amberwolf]

No, a stepper motor is a different kind of beast.

 

[apullin]

Eh, I think think they are pretty much the same, with a slightly different geometry. That is, the principle is the same: generating torque by variable reluctance, rather than I x B * L .