Me kuke so kuwa Rogowski Coil?

Mai zan iya Rogowski Coil?

Tushen Rogowski Coil

Rogowski Coil yana nufin karamin adadin mai kawo (AC) da kuma adadin kawo na takaice ko na pulsa.

Karakteristik Rogowski Coil

Rogowski Coil yana cikin karamin N na gurbin da take tsakiyar tsakiya. Ba a kan Rogowski Coil wani abu mai kare ne. Tsakiyar tsakiya na Rogowski Coil yana ci gaba a nan darasi masu tsakiya zuwa hukumar da dama. Saboda haka, duk hukumomin yana cikin darasi daban-daban.

Siffarun Yadda Ake Amfani Da Rogowski Coil

Rogowski Coils sun yi aiki a cikin siffar Faraday, kamar AC current transformers (CTs). A cikin CTs, fassara da ke faruwa a cikin coil na biyu yana mutane da adadin kawo a cikin gabashin kawo. Ya kamata Rogowski Coils da AC current transformers ita ce a kan abin da ke kare. A cikin Rogowski Coils, ana amfani da air core, kuma a cikin current transformer, ana amfani da steel core.

Idan kawo ya faruwar da gabas, za a faruwa shi a cikin Rogowski Coil. Fassara da ke faruwa yana mutane da adadin kawo a cikin gabashin kawo. Rogowski Coils suna da rike mai kare. Yanzu, fassara da ke faruwa a cikin Rogowski Coil yana haɗa da integrator circuit. Saboda haka, fassara ta Rogowski Coil yana haɗa da integrator don bayyana fassara da ke faruwa da yake da muhimmanci da adadin kawo na gabas.

Integrator Rogowski Coil

A cikin abubuwa da ake amfani da su a integrator, akwai nau'o'i biyu na integrator;

• Passive Integrator

• Active Integrator

Passive Integrator

Don ingantaccen fassara da ke faruwa a cikin Rogowski Coil, series RC circuit yana aiki a cikin integrator. Yadda ake haɗa da Resistance (R) da Capacitance (C) yana ba da muhimmanci ga phase error da ake gaji.

Alaka da R da C da phase error zai iya samun shi daga phasor diagram ta RC network. Kuma yana cewa a nan cikin figure.

A cikin phasor diagram,

VR da VC sun nufin fassara da ke faruwa a cikin resistor da capacitor,

IT yana nufin net current a cikin network,

V0 yana nufin fassara da ke faruwa. Wannan fassara yana daidai da fassara da ke faruwa a cikin capacitor (VC),

VIN yana nufin input voltage. Wannan yana vector sum da fassara da ke faruwa a cikin resistor da capacitor.

Fassara da ke faruwa a cikin resistor yana daidai da fassara

da ke faruwa a cikin capacitor zai lag by 90˚ da net current.

Active Integrator

RC circuit yana aiki a cikin attenuator, da ya haifar fassara da ke faruwa a cikin capacitor. A lissafin adadin kawo, fassara da ke faruwa zai iya kasance mafi yawa, a microvolts (μV), wanda yake da shirya da Analog to Digital Converter (ADC).

Wannan matsala zai iya shafi a tunse Active Integrator. Circuit ta active integrator yana cewa a nan cikin figure.

A nan, RC element yana cikin feedback path ta Amplifier. Gain ta amplifier zai iya haɗa da wannan equation.

Fa'idodin Rogowski Coil

• Yana iya jawabi adadin kawo na bari.

• Ba a kan danger da opening of the secondary coil ba.

• Air an amfani da shi a cikin medium, ba a kan magnetic core. Wannan ya haifar risk of core saturation.

• A cikin wannan coil, temperature compensation yana da shirya.

Matsalolin Rogowski Coil

• Don samun adadin kawo na waveform, fassara da ke faruwa a cikin coil yana buƙatar integrator circuit. Yana buƙatar power supply da 3V zuwa 24Vdc.

• Ba zan iya maɓa adadin kawo na DC ba.