How to correctly handle mutual inductance and self-inductance, and how to determine the direction?
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It would be great to have some examples; I hope everyone will participate actively, hehe.
Two coils that are not connected to each other: when the current in one coil changes, the magnetic field generated thereby induces an electromotive force in the other coil. This phenomenon is known as mutual inductance. Direction of electromotive force: First, determine the increase or decrease in magnetic flux in the mutual inductance coil; then, use Lenz’s law to determine the direction of the magnetic field lines generated by the induced current in the mutual inductance coil; finally, use the right-hand rule to determine the direction of the induced current, which is the direction of the mutual inductance electromotive force. A typical application is transformers. The phenomenon of electromagnetic induction caused by changes in the current within the conductor itself is known as self-induction. Direction of the electromotive force: When the current increases, the direction of the self-induced electromotive force is opposite to that of the original current; when the current decreases, their directions are the same. A typical application is an inductive rectifier circuit.
Could you provide a picture of the winding direction of the windings and explain it in detail?