The Helmholtz coil pair is driven by a function generator amplifier to produce an ac magnetic field.Īchieving high magnetic fields in coils requires high electrical current. Obtaining a high ac magnetic field faces a number of challenges that aren’t present with dc fields.ġ. Although most Helmholtz coil magnetic fields are static or dc, increasingly more tests and experiments are requiring ac magnetic fields over a wide frequency range. Figure 1 shows a depiction of a Helmholtz coil pair driven by a function generator amplifier.
It produces a highly uniform magnetic field over a large open area. One the most common methods to generate a magnetic field is a Helmholtz coil pair. Examples of such applications include bio-medicine research on the effect of a magnetic field on living cells, scientific experiments, probe calibration, magnetic-field interference on electronic products, and much more. Oftentimes, high field strength is needed. Numerous test-and-measurement applications require a high-frequency magnetic field.
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