Zero maintenance. Wound copper magnet, instead of rare earth magnets. Above 95% efficient.
Whenever these become mainstream I'll be interested in comparing them to the Elaphe motors Aptera is currently using.
Slightly closer to reality than a university breakthrough, but we'll see...
Again the magnetic field created is proportional to current and number of turns voltage does not come into the equation. ( You actually want to keep the voltage as low as you can, but there is a optimum balance) You control the speed of the motor by the frequency sent to the motor, the strength of the electro magnetic magnetic field is controlled by the duty cycle of this frequency, therefore there is no need to control the magnetic field of the magnets.
It is very hard to create magnetic fields as strong as rare earth magnets with electro magnets. Not counting the I square R losses in the electro magnet.
In the hub motor you have magnets and coils but these coils are being used as electro magnets to either attract or repel the magnets.
The more voltage and current you apply to the coils / electro magnets the more repel/attract force is applied to the magnets.
The higher the frequency of the DC pulses to the coils the faster the motor will turn
But you cannot adjust the magnetic force of the magnet. That is a fixed value. If you replace the magnets with coils (electro magnets) then you can control the repel or attract force.
Thus you can now double or triple the force and create a for stronger motor.
With neodymium n52 magnets (strongest rare earth magnets) the magnitism is fixed or a certain strength. With a coil (induction) you can make it as strong as you want by using many turns and a high voltage.. Thus by using diodes and capacitors you can apply thousands of volts impulses to the coil that could provide a magnetic pulse that is hundred times or more stronger than a fixed value of the strongest neodymium magnet.
A induction motors? What is novel about this design?
We drive the Mahle - until we get our Aptera delivered 😁
oh oh, I had better sell my shares in my North American Rare earth miner.... I might have bit of time though. :o)) Defense Metals if anyone cares. https://defensemetals.com/ I do like the idea of zero maintenance and cheaper motors.