Coupling AC and DC magnetic fields

In summary, the speaker is seeking advice on how to use a 30A DC power supply and a 1000W stereo amp to create a 10mT static DC magnetic field on top of a 1 mT AC magnetic field. They plan to use a 1 uF snubber cap to generate the AC field, but are unsure of the best method to couple the DC power supply into the circuit. One suggestion is to use a simple amplifier with a power transistor after the snubber cap.
  • #1
spitzbubchen
1
0
Hoping that one of you electrical wizards may be able to help me out!

I have a 30A DC HP power supply and a 1000W stereo amp that I want to use create a 10mT static DC magnetic field superimposed on top of a 1 mT AC magnetic field. To generate the AC field I have a 1 uF snubber cap. in series with my magnetic coil so that they resonate at around 1300 Hz (to overcome the massive inductive resistance). Using the SAME magnetic coil I want to couple my DC power supply into this circuit. What is the best method of doing this? I thought I could send my DC through a choke (inductor) and into the circuit right behind the cap., but such power chokes are massive and really expensive!

Thanks
 
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  • #2
You could make a simple amplifier using the DC source and a power transistor after the snubber cap. It could designed to have a gain of one if you don't want to amplify the 1300 Hz signal any more than it is. Simple amplifiers will naturally have a DC offset and it actually takes a bit of work to get rid of the DC in the output. I'm not an amp pro so I don't know off the top of my head which particular transistor configuration will suit your needs best.
 

FAQ: Coupling AC and DC magnetic fields

What is coupling AC and DC magnetic fields?

Coupling AC and DC magnetic fields refers to the process of combining alternating current (AC) and direct current (DC) magnetic fields to create a more complex and efficient magnetic field. This can be achieved by using special devices such as transformers or by physically placing AC and DC magnetic sources close to each other.

Why is coupling AC and DC magnetic fields important?

Coupling AC and DC magnetic fields allows for a wider range of applications in various industries such as power generation, transportation, and medical imaging. It also helps to increase the strength and control of the magnetic field, making it more versatile and useful for different purposes.

What are the benefits of coupling AC and DC magnetic fields?

The main benefit of coupling AC and DC magnetic fields is the ability to create a more complex and powerful magnetic field. This can be useful in applications where a strong and controlled magnetic field is needed, such as in electric motors, generators, and magnetic resonance imaging (MRI) machines.

Are there any risks associated with coupling AC and DC magnetic fields?

Yes, there are potential risks associated with coupling AC and DC magnetic fields. These include electromagnetic interference, heating of materials due to eddy currents, and safety hazards for individuals who may come in contact with the combined magnetic field. Proper precautions and safety measures should be taken when working with these fields.

How can I learn more about coupling AC and DC magnetic fields?

There are many resources available to learn more about coupling AC and DC magnetic fields, including scientific articles, books, and online courses. It is also helpful to consult with experts in the field or join professional organizations related to magnetism and electromagnetism.

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