Hello,
I am doing a project to prove electromagnetic induction can be used to drive a simple 4.5V DC motor. Setup is as follows.
Input: 120V to 12V AC stepdown transformer
Primary coil: 100 turns of 24AWG enameled copper wire wound around a galvanized nail 6" long
each end of primary coil is connected to the 12V AC transformer
voltage measured is about 6.64V (Problem 1: Why is that voltage lower than 12V?)
Secondary coil: 100 turns of 20AWG enameled magnet wire would around another galvanized nail 6" long
distance between primary and secondary coil 1cm
voltage measured at secondary coil is about 0.75V (Problem 2: Why is the voltage so low? is it because the inductive coupling is very lossy)
Next step is to connect the secondary coil to a rectifier and then the DC output of the rectifier to a 4.5V motor. I think I need a capacitor to smooth out the DC from the rectifier before going to the motor.
what I am doing wrong in Step 1? Any insight/education will be much appreciated.
I am doing a project to prove electromagnetic induction can be used to drive a simple 4.5V DC motor. Setup is as follows.
Input: 120V to 12V AC stepdown transformer
Primary coil: 100 turns of 24AWG enameled copper wire wound around a galvanized nail 6" long
each end of primary coil is connected to the 12V AC transformer
voltage measured is about 6.64V (Problem 1: Why is that voltage lower than 12V?)
Secondary coil: 100 turns of 20AWG enameled magnet wire would around another galvanized nail 6" long
distance between primary and secondary coil 1cm
voltage measured at secondary coil is about 0.75V (Problem 2: Why is the voltage so low? is it because the inductive coupling is very lossy)
Next step is to connect the secondary coil to a rectifier and then the DC output of the rectifier to a 4.5V motor. I think I need a capacitor to smooth out the DC from the rectifier before going to the motor.
what I am doing wrong in Step 1? Any insight/education will be much appreciated.