Magnetically coupled inductors an AC circuits

In summary, the conversation discusses using dependent sources when solving problems with magnetically coupled inductors. The question is whether there needs to be a specific polarity assigned to the sources, and if it is necessary to make them positive when doing the mesh. It is suggested to use a free image hosting site to avoid waiting for attachments to be approved.
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iceman_ch
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When solving problems with magnetically coupled inductors I like to add dependent sources so that I can keep everything straight. My question is when I add the dependent sources does there need to be a specific polarity to them. With the way that AC works I would think that it doesn't matter what polarity you assign them because in the end the angle is what determines the poliarity. I could make it so that when I do the mesh the sources come out positive. Is this the best way to solve this problem or is there another way.

Thanks
 

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If you post your image on a free image hosting site, and put the link here, we won't have to wait for the attachment you already posted to be approved.
 
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I would say that there is no specific polarity required for the dependent sources in magnetically coupled inductors in AC circuits. The important factor is the angle, as you mentioned. The polarity of the dependent sources may impact the direction of current flow in the circuit, but it ultimately depends on the specific problem and how you choose to solve it. Adding dependent sources can be a helpful tool in keeping track of the circuit variables, but it is not the only way to solve the problem. There may be other methods or approaches that could also be effective. It is important to carefully analyze the problem and choose the most appropriate approach for solving it.
 

FAQ: Magnetically coupled inductors an AC circuits

1. What is the purpose of magnetically coupled inductors in AC circuits?

Magnetically coupled inductors in AC circuits are used to transfer energy from one circuit to another through mutual induction. They allow for efficient power transfer and can also be used for impedance matching.

2. How are magnetically coupled inductors different from regular inductors?

Magnetically coupled inductors have a shared magnetic field and are placed close to each other, while regular inductors have separate magnetic fields. This allows for the transfer of energy between the two inductors.

3. Can magnetically coupled inductors be used in DC circuits?

No, magnetically coupled inductors are designed specifically for use in AC circuits. In DC circuits, the magnetic field would remain constant and there would be no energy transfer between the inductors.

4. How do you calculate the mutual inductance between two magnetically coupled inductors?

The mutual inductance between two magnetically coupled inductors can be calculated using the formula M = k * √(L1 * L2), where k is the coefficient of coupling and L1 and L2 are the inductances of the two inductors.

5. Can magnetically coupled inductors have a negative mutual inductance?

No, mutual inductance is always a positive value. However, if the two inductors have opposite polarity, the mutual inductance will have a negative sign to indicate the direction of energy transfer.

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