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Hi all,
I have a dozen of these common-mode chokes from EMI filters in my box, taken from old fluorescent lamp ballasts and other SMPS power supplies. There's an idea to modify one of them to a current transformer, its windings would be the secondary winding of a current transformer. This choke is made up of two windings, each with about 30-50 turns, and I just need to add a primary winding, which would consist of 2 or 4 turns. I could figure out the exact number of turns with a generator.
There would be about 30 mA of current in the primary winding of the transformer, with a frequency of around 200 kHz.
Is the ferrite on such chokes suitable for working at 200kHz? Has anyone done something similar?
Thanks in aticipation
I have a dozen of these common-mode chokes from EMI filters in my box, taken from old fluorescent lamp ballasts and other SMPS power supplies. There's an idea to modify one of them to a current transformer, its windings would be the secondary winding of a current transformer. This choke is made up of two windings, each with about 30-50 turns, and I just need to add a primary winding, which would consist of 2 or 4 turns. I could figure out the exact number of turns with a generator.
There would be about 30 mA of current in the primary winding of the transformer, with a frequency of around 200 kHz.
Is the ferrite on such chokes suitable for working at 200kHz? Has anyone done something similar?
Thanks in aticipation
