What is the difference between AC and DC windings?

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amaresh92
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what is meaning of ac winding and dc winding?how it differs from each other?
advanced thanks.
 
A standard fluxgate magnetometer for measuring dc magnetic fields uses a dc winding (biasing current) on an ac transformer to cancel the imposed dc magnetic field and null the output signal. Sometimes the dc bias current is imposed directly on the ac secondary output coil, as shown in the thumbnail.

Bob S
 
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  • Block diagram of a field feedback fluxgate magnetometer: oscillator, flip flop, PA/EXC drive to the fluxgate transformer, SIG output to preamp, synchronous demodulator, amp with feedback resistor Rf and capacitor C, output Vo.
    Fluxgate_magnetometer.jpg
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