making a big magnetic field

We would be thankful if you would ask your question specifically.

What are you trying to achieve?

 

At 10 meters, not a chance. This would require a huge amount of energy, the components needed to do this would probably be heavier than your robot. And how would you protect your robot only being a few centimetres away?
Adam

 

Magnetic fields can certainly pass through metals. I can't help you any further sorry.
Adam

 

This is way above me, one thought I have had is you could cover you robot in Lead. Lead is a superconductor so the magnetic filed can't go through it.
Adam

 

No sorry, I don't know enough to help
Adam

 

I believe there is a rule on this forum about helping with weapons.

Bob

 

Creating a destructive EMP typically requires discharging a high voltage capacitor or a high voltage energy-storing delay line into a radiating load (an antenna) using a very fast switch. The faster the turn-on, the more high-frequency content in the radiated EMP. Pulse widths of a few microseconds and turn-on times of a few picoseconds with pulse repetition rates upwards of a few kilohertz are possible. The voltage required to generate a significant (destructive) amount of EMP energy is upwards of ten kilovolts. Stray inductance and stray capacitance and circuit resistance are not your friends as these must all be minimized. I wouldn't even consider using this technology, which is very sophisticated, as a weapon in a robot fight. It might work once, but then the opponent robot would simply "shield up" against the EMP for the next contest. Have you considered "brute force" (bigger, heavier, more power) to overwhelm the opposing robot?

 

I suspect the robots are limited in size and weight. Otherwise someone would just use a monster truck.

Bob