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Magnetic stability and standard

by AOMag | post a comment

Magnetic stability
Unless the magnet is operated beyond specific conditions of "irreversible loss", the magnetic loss is very small. If re-magnetized, it again regains the initial flux, and no longer produces irreversible losses of the flux.
If an irreversible flux loss occurs, this will result in unpredictable differences between the initial design and the final operating state. To avoid this difference, the magnet is usually preconditioned so that it does not have additional magnetic flux in operation Losses (usually using the best materials and special production process to reduce the magnetic loss).
If the flux loss (in operation) is caused by temperature rise, the thermal stability of the magnetic properties is taken into account.
If the flux loss is due to a strong magnetic field outside the demagnetization, then the magnetic stability of magnetic properties in the list.
Magnetic calibration
Flux output changes are unavoidable, and most applications accept normal variations in flux output. In order to achieve a sufficiently accurate magnetic flux transfer tolerance, the magnets are placed in a detachable unit for calibration. This is commonly referred to as a magnetic calibration routine, and occasionally a magnetic thermal stability calibration - is necessary where high temperature is uniform.
AIC has extensive experience in working with magnets under high temperature or external magnetic field conditions. For example, both in open-circuit and closed-circuit load conditions, to adjust its operating temperature.
In order to achieve a stable flux output under wide temperature variations, the customer must use a samarium cobalt magnet with a flux change of 50 ppm / ° C at -40 to 200 ° C.

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