Mataiki Mai Tsirrai

A gaba da kuma, yana da kyau a iya duba wasu abubuwa a cikin lokacin da muke so ku fada soft magnetic materials.

• Remanent Induction:
  Shi ne mai girma na indakwarsa da ya bace bayan an sanya material da suka maganice da kuma an yi nasara wannan sanya ta hanyar maganice. An nufin shi da Br.

• Coercive Force:
  Shi ne kashi da ya dace don in taka remanent induction zuwa zero. An nufin shi da Hc.

• Tsakiyar hysteresis loop = kashi da ake biye a lokacin da ake maganice material da volume ɗaya a cikin tsari.

• Yana da ci gaban domain da kuma ci rokon domain a lokacin da ake maganice. Duk daɗinsu zai iya zo ko ba zai iya zo ba.

• Magnetic materials suna cikin (da kadan da coercive force) na biyu - hard magnetic materials da soft magnetic materials,

Daga nan, za a iya ci gaba kan abin da. Soft magnetic materials suna iya maganice da kuma demagantice. Wannan shine saboda kashi da ke ƙarin ita ce. Wadannan materials suna da coercive field ƙarin da yake da 1000A/m.

Ci gaban domain da wadannan materials suna iya samun daidai. Suna amfani da su don ci gaban flux ko/da kuma don ci gaban hanyar flux da ake biye da electric current. Abubuwan da ake amfani da su don canza ko karɓar soft magnetic materials sun hada da permeability (da ake amfani don in canza yadda material yake tabbatar da applied magnetic field), Coercive force (da aka tattauna), electrical conductivity (yadda material yake magance electric current) da saturation magnetization (kashi da maɗa a material yake iya biye).

Hysteresis Loop

Shi ne actually loop da material da suka maganice yake tattara a lokacin da ake maganice da alternating magnetic field. Don soft magnetic materials, loop yana da tsakiyar ƙarin (figure 2). Saboda haka, hysteresis loss yana da ƙarin.

Properties of Soft Magnetic Materials

• Utmost permeability.

• Slight coercive force.

• Small hysteresis loss.

• Small remanent induction.

• High saturation magnetisation

Wasu daga cikin soft magnetic materials masu muhimmanci sun hada da:
Pure Iron
Pure iron take da carbon content ƙarin (> 0.1%). Wannan material yana iya samun da utmost permeability da coercive force ƙarin da taka da tushen da za a iya amfani da shi. Amma, yana biye eddy current loss a lokacin da ake maganice da flux density ƙarin saboda low resistivity. Saboda haka, ana amfani da shi a low frequency application kamar components for electrical instruments and core in electromagnet.

Silicon Iron Alloys
Wannan material shine mostly used soft magnetic material. The addition of silicon will make increase in permeability, low eddy current loss due to increase in resistivity, low hysteresis loss. They are used in electrical rotating machine, electromagnet, electrical machine and transformer.
Nickel Iron Alloys (Hypernik)
It is used in communication equipment such as audio transformer, recording heads and magnetic modulators because of high initial permeability in feeble fields. They also possess low hysteresis and eddy current losses.
Grain oriented sheet steel: used to make transformer cores.
Mu-metal: used in miniature transformers meant for circuit applications.
Ceramic magnets: used for making memory devices for microwave devices and computer.

Application of Soft Magnetic Materials

An haɗa da biyu na biyu na ayyuka da ake amfani da soft magnetic materials – AC application and DC applications.

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