Mutual induction energy storage

What determines mutual inductance?

As mentioned earlier, the mutual inductance depends on the geometry of the coils with respect to each other, the magnetic core, and their orientation. A maximum mutual inductance is reached with the linking flux of one coil entirely passing through the second coil.

How do you calculate mutual inductance?

Determine the mutual inductance of the system. To calculate the mutual inductance M, we first need to know the magnetic flux through the rectangular loop. The magnetic field at a distance r away from the straight wire is B = μ I /2 π r , using Ampere’s law. The total magnetic flux Φ Consider the circuit shown in Figure 11.11.4 below.

What happens if mutual inductance does not exist?

If this path does not exist or the flux is not time-varying, the mutual inductance disappears. Mutual inductance is often shown by ● signs on one of the terminals at each port. The dot’s location and the direction of current in and out of the dot determine the polarity of the induced voltage due to mutual inductance.

What is a positive mutual inductance?

The mutual inductance part of the circuit shown with terminals a, b, c, and d can be replaced with its T equivalent. The arrangement of dotted terminals and the direction of currents result in a positive mutual inductance value. The circuit and current directions are shown in Fig. 6.22. Circuit of Example 6.7.

Which circuit has a mutual inductance of M?

Consider the following circuit in which two inductors L1 and L2 have a mutual inductance of M. This mutual inductance might be positive or negative, depending on the dotted terminals and the current direction, which also determines the polarity of the induced voltage.

Can energy be stored in an inductor?

From the work-energy theorem, we conclude that energy can be stored in an inductor. The role played by an inductor in the magnetic case is analogous to that of a capacitor in the electric case. If the current is increasing with dI / dt > 0 , then P > 0 which means that the external source is doing positive work to transfer energy to the inductor.