Ilusys Systems - 2017-05-22
Incredible motor design by Christoph Laimer: https://www.youtube.com/watch?v=YsSm65DAcCg I told in video, that i am kinda disapointed, that is, because I didn't see all the measurements. So from 1500 to 900 RPM this motor had 30% efficiency, which is quite good for the fact, that this is only half-motor. so with using bar magnets 75% may be achievable. And who knows, perhaps even more.
ballancing your rotary disc will also help to enhance the efficiency. Cool design!
how is the driver frequency measured(between which wires) and how is it related to the RPM
I read RPM directly by looking at hall sensor
For most AC motors RPM = (120 * freq) / number of poles
How many magnet and what size.... also wire winding and turn please tellme... i wanna make one and wanted copy from you... please help me
Air core motors have no torque, low efficiency and are not used for those reasons. Congratulations.
Fake
Gunter Flunder - 2020-05-09
The low efficiency is mainly caused by the applied kind of constant voltage operation. If you operate an electric machine with too much voltage compared to its back emf the motor windings will draw too much current and act mainly as heaters and not as back emf limited power coils. Constant average current operation under self commutation make sure, that the motor operates at a certain tourque at its power goes linear with the motor speed. The coil will never get to much current or to much voltage.