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How to obtain magnetic and electric field distribution

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Hi all,

My project involves building a coil which consists of a current source going through the inner conductor and closing the loop by going through the outer conductor.

-There seems to be an error trying to specify the direction of the current in the multi-turn coil node. While I was selecting the edges, the directions didn't go the way I intended them to, which is counter clockwise starting from/ending at [current source]

-Also, if I wanted to have a current source with 1 Amps with a 128MHz frequency, would the study be frequency instead of stationary?

Attached is the file.

Thanks!



3 Replies Last Post 2016年2月17日 GMT-5 21:17
Nirmal Paudel COMSOL Employee

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Posted: 9 years ago 2016年2月14日 GMT-5 15:14
Hi Jeff,

The Multi-Turn Coil -> Circular type is only supported for a circular conductors, for example, toroid (en.wikipedia.org/wiki/Toroid) or Circular. However, in your case this is not true. For this type of configurations, you must use the Multi-Turn Coil -> Numeric. See this example for detail of numeric type Multi-Turn Coil settings.
www.comsol.com/model/multi-turn-coil-above-an-asymmetric-conductor-plate-13777
www.comsol.com/model/multi-turn-coil-winding-around-a-ferromagnet-23641

-Also, if I wanted to have a current source with 1 Amps with a 128MHz frequency, would the study be frequency instead of stationary?
->> Yes, you could do this using the Frequency Domain study with 128[MHz] frequency.

Best Regards,
Nirmal
Hi Jeff, The Multi-Turn Coil -> Circular type is only supported for a circular conductors, for example, toroid (https://en.wikipedia.org/wiki/Toroid) or Circular. However, in your case this is not true. For this type of configurations, you must use the Multi-Turn Coil -> Numeric. See this example for detail of numeric type Multi-Turn Coil settings. http://www.comsol.com/model/multi-turn-coil-above-an-asymmetric-conductor-plate-13777 http://www.comsol.com/model/multi-turn-coil-winding-around-a-ferromagnet-23641 -Also, if I wanted to have a current source with 1 Amps with a 128MHz frequency, would the study be frequency instead of stationary? ->> Yes, you could do this using the Frequency Domain study with 128[MHz] frequency. Best Regards, Nirmal

Nirmal Paudel COMSOL Employee

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Posted: 9 years ago 2016年2月14日 GMT-5 15:16
Hi Jeff,

The Multi-Turn Coil -> Circular type is only supported for a circular conductors, for example, toroid (en.wikipedia.org/wiki/Toroid) or Circular. However, in your case this is not true. For this type of configurations, you must use the Multi-Turn Coil -> Numeric. See this example for detail of numeric type Multi-Turn Coil settings.
www.comsol.com/model/multi-turn-coil-above-an-asymmetric-conductor-plate-13777
www.comsol.com/model/multi-turn-coil-winding-around-a-ferromagnet-23641

-Also, if I wanted to have a current source with 1 Amps with a 128MHz frequency, would the study be frequency instead of stationary?
->> Yes, you could do this using the Frequency Domain study with 128[MHz] frequency.

Best Regards,
Nirmal
Hi Jeff, The Multi-Turn Coil -> Circular type is only supported for a circular conductors, for example, toroid (https://en.wikipedia.org/wiki/Toroid) or Circular. However, in your case this is not true. For this type of configurations, you must use the Multi-Turn Coil -> Numeric. See this example for detail of numeric type Multi-Turn Coil settings. http://www.comsol.com/model/multi-turn-coil-above-an-asymmetric-conductor-plate-13777 http://www.comsol.com/model/multi-turn-coil-winding-around-a-ferromagnet-23641 -Also, if I wanted to have a current source with 1 Amps with a 128MHz frequency, would the study be frequency instead of stationary? ->> Yes, you could do this using the Frequency Domain study with 128[MHz] frequency. Best Regards, Nirmal

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Posted: 9 years ago 2016年2月17日 GMT-5 21:17
Hi Nirmal,

Thank you very much for the response. I have looked over the tutorials for the numeric multi-turn coil and hopefully made the proper changes.

When I tried to compute, I kept on getting a "COMSOL assertion failure" for stationary solver 2. Do you have any idea why that is?

Best,
Jeff
Hi Nirmal, Thank you very much for the response. I have looked over the tutorials for the numeric multi-turn coil and hopefully made the proper changes. When I tried to compute, I kept on getting a "COMSOL assertion failure" for stationary solver 2. Do you have any idea why that is? Best, Jeff

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