Harsunan Armaturi a Maimakon DC

Matattun da Tashin Yadda Armature Reaction Yana Iyakace

Matattun: Armature reaction yana nuna yadda tashin armature da tashin mafi yawan mutane suka yi nasara, kuma yana bayyana yadda tashin armature yake iya haɗa da tashin mafi yawa. Tashin armature an yi shi daga juyar da ke armature, kuma tashin mafi yawa an yi shi daga abubuwa masu maganin. Tashin armature yana ba da hanyoyi biyu a tashin mafi yawa:

• Yadda Ya Haɗa da Tashin Mafi Yawa: Armature reaction yana haɗa da tashin mafi yawa a tsari;

• Yadda Ya Kiyaye Tashin Mafi Yawa: Yana kiyaye amfani na tashin mafi yawa.

Tashin Mafi Yawa a Wata DC Generator na Biyu Pole Idan Ba Da Juyar

Amsa wata DC generator da aka nuna a wannan rubutu. Idan alama ta yi aiki idan ba da juyar (yana nufin cewa juyar da ke armature ba suka shiga), zai kasance kawai ma'adonni mai yin maganin (MMF) na pole mafi yawa wanda ke cikin alama. Tashin da MMF na pole mafi yawa ya yi shi yana zama a cikin tsari, wanda aka nufin linyar da ke bayan pole na N da S. Shiga a wannan rubutu yana nuna tsayi na tashin mafi yawa Φₘ. Linyar da ba da tashin mafi yawa yana zama daidai da linyar da ke tashin mafi yawa.

Linyar da ba da tashin mafi yawa yana daidai da linyar da ke geometri (GNA). Brush da ke DC machines suna da shi a wannan linyar, kuma saboda haka ana kiran wannan linyar da linyar da ke commutation.

Bincike na Tashin Mafi Yawa na Armature Conductors da Juyar

Amsa yanayi da kawai armature conductors ne ke juyar, baki daya ba da juyar a pole mafi yawa. Tsayi na juyar yana daidai da dukkan conductors da ke wata pole. Tsayi na juyar da aka yi shi a conductors yana nuna kan Fleming's Right-Hand Rule, kuma tsayi na tashin da conductors suka yi shi yana nuna kan Corkscrew Rule.

Juyar a armature conductors na fadimta yana zama a cikin kaɗi (yanayin da aka nuna da cross inside a circle). Ma'adonni mai yin maganin (MMFs) na conductors suka gudanar da tashin mafi yawa a cikin armature. Duk da haka, conductors na tsohon yana da juyar a fage da kaɗi (yanayin da aka nuna da dot inside a circle), kuma MMFs suka gudanar da tashin mafi yawa. Saboda haka, MMFs na duk biyu suka gudanar da tashin mafi yawa a fage, kamar yadda aka nuna a rubutun Φₐ a fage.

Wannan rubutu na nuna yanayin da field current da armature current suka yi a conductors daidai.

Hanyoyi na Armature Reaction a Electrical Machines

Idan alama ta yi aiki idan ba da juyar, zai kasance kawai tashin biyu: tashin armature (da ke juyar da ke armature conductors) da tashin pole mafi yawa (da ke pole mafi yawa). Tashin biyu suka gudanar da tashin mafi yawa Φᵣ, kamar yadda aka nuna a wannan rubutu.

Idan tashin mafi yawa ta yi nasara da tashin armature, zai kasance distortion: amfani na tashin mafi yawa yana zama a tsakiyar pole na N da kafin pole na S, kuma yana kiyaye a kafin pole na N da tsakiyar pole na S. Tashin mafi yawa yana zama a tsayin tsayi na generator, kuma linyar da ba da tashin mafi yawa (MNA)—kawo daidai da tashin mafi yawa—yana zama daidai.

Hanyoyi Masu Yawa na Armature Reaction:

• Amfani na Tashin Mafi Yawa

• Armature reaction yana zama amfani na tashin mafi yawa a wata batu na pole kuma yana kiyaye a batu na biyu.

• Jumla na tashin pole yana kiyaye kadan, kuma yana kiyaye terminal voltage—wannan yana nufin demagnetizing effect.

• Distortion na Tashin Mafi Yawa

• Tashin mafi yawa yana haɗa da tashin mafi yawa.

• A generators, MNA yana zama da tashin mafi yawa; a motors, MNA yana zama da tsayi na tashin mafi yawa.

• Commutation Challenges

• Armature reaction yana haɗa da tashin mafi yawa a neutral zone, kuma yana haɗa da voltages wanda ke commutation issues.

• Neutral Axis Definitions

• MNA wanda induced EMF yana zama zero.

• Geometric neutral axis (GNA) yana zama daidai da armature core.