Infinite current draw for BLDC/Synchronous AC motor

Question

I have recently created a motor that runs off of outlet power, single phase 120 V AC. My stator is taken from a universal motor from a vacuum cleaner and has two windings on either side, wired to form opposite polarities at every cycle of the AC sine wave. My rotor sits inside the stator and is made of a LEGO body with 4 neodymium magnets arranged in a N, N, S, S configuration each 90 degrees apart from each other. This allows the rotor to rotate either clockwise and counterclockwise depending on the orientation of the permanent magnets and the initial position of the sine wave when it is plugged in. When I plug it into a surge protector, I can only run the motor for around 1-2 seconds at no load before the breaker switch pops. It is worth mentioning that the universal motor from which I took the stator from originally had a brush DC type rotor inside complete with a commutator, brushes, and its own set of 16 windings. Current was being used by both the stator and rotor, but when I replaced the original rotor with my permanent magnet design all the current was being directed only to the stator, which I feel like is what is causing the massive current spike as the current is not being used by multiple components anymore. In the vacuum cleaner I'm pretty sure the current was used by different components such as valves before it got sent to the motor. Is there a way I can design a circuit to limit the current draw from the surge protector? Perhaps I can create a transformer to drop the current, or create a soft start but I do not know how. Maybe I can wire lightbulbs in parallel to act as resistors and drop the current before it gets sent to the motor. My theory is that by adding more resistive components the motor can only receive a limited amount of current and cannot "pull" more current from the power source because of the resistors in the way. However the more components I add the more current is needed for them to operate, so the effect might cancel out. What is the most efficient way?

Answer 1

You need to first study basic circuit theory more carefully. You also need to understand more about motors.

The rotor of the motor connected in series with the stator is what controlled the current as the motor was used originally. The rotor had resistance, but more importantly, the rotor generated a voltage called "back electromotive force (EMF). that opposed the current.

120 volts is way too much voltage to apply to just the stator. You could connect resistance in series to reduce the current, but that will generate quite a bit of heat and waste energy. It would be better reduce the voltage with a transformer. You need an AC ammeter to measure the current with whatever you can find to connect in series temporarily. You could start with incandescent lightbulbs, but just one will probably limit the current too much. You probably need several lightbulbs connected in a parallel group with the group connected in series with the motor.

Also, with your 4-pole rotor, only two poles will be effectively engaged with the two-pole stator.

If I wanted to do something like this, I would use the stator of a shaded-pole fan motor with a 2-pole rotor. A stator like that would not need anything to reduce the current.