- #1
Jdo300
- 554
- 5
Hello All,
I was wondering if someone could help me figure out how to calculate the induced voltage across each of the four windings on a toroidal transformer that I am going to make for a project (see attached sketch).
The two black coils are the power in and out coils, and the two red coils are sense and feedback coils. Basically, I'm making a switching circuit that will pulse square waves into the primary side and step them up to higher voltage spikes on the secondary side. From there the spikes will travel through a series of coils and then back to the red feedback coil. I'm trying to make a circuit that will self-tune as it is running. The top trigger coil will pick up the feedback spikes and switch on the pulse input to send another pulse through the system. I am going to be winding this transformer myself around a ferrite core that is about 2.25" ID x 3.125" OD x 0.375" thick. I'll be using the magnet wire that you can get from RadioShack (comes in 22, 26, and 30 gauge) to wind the coils with. But I want to get a ballpark idea of how many turns to make for each of the four coils. In case this helps, I'll be pulsing 25V square waves into the primary and I want just enough voltage induced on the trigger coil to switch on the gate of the MOSFET that I'm using to pulse the primary (4V).
Could someone point me to some equations that can be used to figure this out?
Thank you,
Jason O
I was wondering if someone could help me figure out how to calculate the induced voltage across each of the four windings on a toroidal transformer that I am going to make for a project (see attached sketch).
The two black coils are the power in and out coils, and the two red coils are sense and feedback coils. Basically, I'm making a switching circuit that will pulse square waves into the primary side and step them up to higher voltage spikes on the secondary side. From there the spikes will travel through a series of coils and then back to the red feedback coil. I'm trying to make a circuit that will self-tune as it is running. The top trigger coil will pick up the feedback spikes and switch on the pulse input to send another pulse through the system. I am going to be winding this transformer myself around a ferrite core that is about 2.25" ID x 3.125" OD x 0.375" thick. I'll be using the magnet wire that you can get from RadioShack (comes in 22, 26, and 30 gauge) to wind the coils with. But I want to get a ballpark idea of how many turns to make for each of the four coils. In case this helps, I'll be pulsing 25V square waves into the primary and I want just enough voltage induced on the trigger coil to switch on the gate of the MOSFET that I'm using to pulse the primary (4V).
Could someone point me to some equations that can be used to figure this out?
Thank you,
Jason O