Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
3D two solenoid coil self inductance and mutual inductance
Posted 5 giu 2017, 13:02 GMT-4 Low-Frequency Electromagnetics, Geometry Version 5.2 1 Reply
Please login with a confirmed email address before reporting spam
Thank you for your sincere response before.
I'm now struggling to realize to calculate mutual inductance between 3D two solenoid coils.
I used 3D model since I have to realize parallel two axis for misalignment although the solenoid has axisymmetric shape.
I have some confusion because the results (self inductance first) comparing to 2D results that I performed before with one solenoid model using 2D axisymmetric model.
I think 2D axisymmetric result makes sense so I don't understand why 3D result has so large self
inductance.
2D Axisymmetric model Self inductance: ~145uH
3D model Self inductance: 2309.6uH
I used
Results-Global Evaluation-Expression-Model-Component1-Magnetic Field-Coil parameter- Coil inductance: mf.LCoil_1
Could you give me some advice or recommendation to realize this model?
I think I may have some mistake for 3D modeling.
I'm really looking forward to hearing from you.
<2D axisymmetric model> Physics: Magnetic Fields, Study: Stationary
1. Geometry:
Rectangle- Width: 1.63mm
- Height: 2.5cm
-Position:
Base: center, r:25[cm]
z: 1.25[cm]
2. Material : Copper
3. Magnetic Fields-Multi-Turn Coil
Material type: From material
Coil excitation: Current
Coil currnet: 1[A]
Number of turns: 11
Coil wire cross-section area: American wire gauge: 14AWG
3. Global Evaluation:
Self inductance: ~145uH
<3D model> Physics: Magnetic Fields, Study: Stationary
1. Geometry
Using Cylinder (Boolean difference)
Cylinder1:
Radius: 25cm
Height: 2.5cm
Cylinder2:
Radius: 24.837cm (for 14 AWG (1.63mm diameter) coil)
Height: 2.5cm
Boolean difference: Cylinder1-Cylinder2
2. Material: Copper
3. Magnetic Fields-Multi-Turn Coil
Material type: From material
Coil type: Circular
Coil current: 1A
Number of Turns: 11
Coil wire cross-section area: American wire gauge: AWG 14
4. Global Evaluation:
Self inductance: 2309.6uH
I assigned circle (2D) and sphere (3D) for air circumstance.
I would be appreciated your help.
Best regards,
Sung
Attachments:
Hello Sung Yul Chu
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.
Please login with a confirmed email address before reporting spam
Please check the coil geometry in the 3D file. Just select a circle to indicate the current direction.
I have tried to modify the coil 1 in your model, and get the self inductance of coil 1 to be 145uH, which is close to the 2D result.