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Fields and Waves

Fields and Waves. Lesson 4.7. MAGNETIC CIRCUITS. R. Flux stayed in TOROID. did not detect with external loop. Introduction. MAGNETIC CIRCUITS used to analyze relays, switches, speakers. In Lesson 4.6 experiment:. coil not wound symmetrically. Magnetic Flux - TOROID.

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Fields and Waves

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  1. Fields and Waves Lesson 4.7 MAGNETIC CIRCUITS Darryl Michael/GE CRD

  2. R Flux stayed in TOROID • did not detect with external loop Introduction MAGNETIC CIRCUITS used to analyze relays, switches, speakers... In Lesson 4.6 experiment: • coil not wound symmetrically

  3. Magnetic Flux - TOROID Flux is a constant = • Flux stays in toroid - so area is a constant B and H are constant along the path Problem 1 - has square material - get H and B, then get Flux and L Do Problem 1a and 1b

  4. g Gap has very strong effect on H Magnetic Flux - TOROID with GAP Add gap to toroid: Apply boundary conditions across gap: Can get very large H in gap

  5. Magneto -motive force Reluctance of iron Reluctance of gap Magnetic Circuits - Analogy to E-circuits • enables us to draw analogy to electric circuits

  6. Magnetic Circuits & Electric Circuits Electric Circuits Magnetic Circuits V or e.m.f NI or m.m.f I High m - low reluctance path Magnetic circuits model: Finish problem 1

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