# I Magnetic flux and how to manipulate it discussion anyone?

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1. Feb 10, 2017

### NMNXX

Good day all, I am looking to discuss how to manipulate the magnetic flux of a coil. I unfortunately lack the math skills to calculate what I actually need to build for my project. I have been coop up in my garage trying to physically solve the problem but I am running out of time and money for materials and I know that the answer is in the math. Any help would be greatly appreciated.

2. Feb 11, 2017

### cnh1995

What manipulations do you want to do?
What is your project?

3. Feb 11, 2017

### rumborak

The OP is indeed very vaguely worded, but I'll throw this Wiki article out there nonetheless:

https://en.m.wikipedia.org/wiki/Magnetic_circuit

These "circuits" (in analogy to electric circuits) are all about the manipulation of the magnetic flux.

4. Feb 13, 2017

### NMNXX

Thank you for the interest.Project: I am currently trying to produce more magnetic flux through a coil. I have a round 3 foot diameter coil that I am trying to fill the entire inner area of the coil with a magnetic field and also project field a distance of 12 inches from the coil. Manipulation: I would like to manipulate the field in two ways. 1. Project the field a greater distance from the coil. 2. Fill entire area with field. Please correct me if I am wrong but my understanding is that I can do 3 things to increase or manipulate the magnetic flux. 1. increase number of turns in coil. 2. increase charge or current. 3. Increase or change shape of coil. Any help or advice would be appreciated. Thank you

5. Feb 13, 2017

### NMNXX

Thank you for the article. I apologize for the vagueness.

6. Feb 13, 2017

### Staff: Mentor

You can also use ferrous metal shapes to guide the flux.

Have you read about Helmholtz coils? That is a way to help you make the flux more uniform in the volume between the two coils...

https://en.wikipedia.org/wiki/Helmholtz_coil

7. Feb 13, 2017

### ZapperZ

Staff Emeritus
This is very confusing, due to the terminology being used (or misused).

Are you making a solenoid? And are you asking how to increase the magnetic field produced by this solenoid?

Zz.

8. Feb 13, 2017

### NMNXX

Thank you for the reply, I have been looking at the Helmoltz coil but have not done decided if it will work for my application. I am afraid I will not be able to reach the distance I need between the two coils. Thanks again

9. Feb 13, 2017

### NMNXX

10. Feb 13, 2017

### Staff: Mentor

Are you working with DC magnetic fields or 60Hz AC magnetic fields? If AC, you can buy inexpensive probes that plug into your DVM to let you know what your field strength is throught the coil and surrounding area. Here is one that I've used in the past:

http://custommagneticshielding.magn...egories/evaluation-kits-meters-probes/ep-101a

11. Feb 13, 2017