Electronics > Projects, Designs, and Technical Stuff

Anyone familiar with designing electric motors?

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max_torque:
There will be two approaches, and in reality, a mixture of both will be required, and these are Theory and Practice!

There is plenty of online resource around eMachines, from magnetic design and simulation to mechanical and electrical architectures etc.

These days, there is as much science in the motor's controller as in the motor itself (which is a fundamentally fairly simple device) so you'd want to get up to speed with motor control strategies such as Field Oriented Control etc.

One easy , cheap practical way to start is to rewind or remagnet an existing motor, be that a hobby style brushless one of something larger.  One demo project i did that worked really well was to use a motor cycle generator as a motor (because they are PM machines), and by adding commutation sensors and a DIY inverter could be used as a good, cheap learning exercise at low voltage and hence intrinsically pretty safe to play with as you learn.

Something like this:



As the (external) rotor is normally supported directly on the crank shaft you'll have to make a suitable bearing and support system, but if you have access to a lathe (or 3d printer these days!) then that's pretty easy using a pair of cheap deep groove sealed ball bearings.

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