Finding required coil current (magnetic circuit)

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SUMMARY

The discussion focuses on calculating the required coil current for a toroidal core with 1000 turns, a major radius of 6 cm, and a minor radius of 1 cm, which establishes a total flux of 0.0002 Wb. To find the coil current, the magnetic field strength (B) is derived using the formula B = Flux / Area. The B-H curve of the non-magnetic core material is referenced to determine the magnetic field intensity (H), leading to the equation H = NI, where N is the number of turns. The coil current can thus be calculated directly from these parameters.

PREREQUISITES
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  • Familiarity with the B-H curve for non-magnetic materials
  • Knowledge of the relationship between magnetic flux, magnetic field strength, and area
  • Basic proficiency in using formulas related to inductance and current calculation
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Homework Statement


Toroidal core
N = 1000 turns
R = 6cm
r = 1cm
established a total flux of 0.0002 Wb in a non-magnetic core.

Find the required coil current
 
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From Flux and area you can find B as B = Flux / area.
From B you can refer to B-H curve and find H. The B-H curve would be of the non magnetic core material.
Your H = NI. You have your N. So the current can be found out.
 

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