Kinamakwabtuka ko Kiyawar Dabbobi na Motorin DC

Muhimman Bremi na Mota Da Tsokoshi

A bremi mai tsayi, ana kofa R_b a matsayin wani babban mutum da ke gaba da armature bayan inda an kawo mota na tsokoshi daga tashar. Anza maimakon generator, ya faru bremi na tsayi.

Sauransu na Bremi Mai Tsayi

Duka hanyoyi masu amfani da su ne don bremi:

• Mota na Shunt ko Separately Excited Idan Generator na Separately Excited:

• An haɗa flux da take daidai don yin bremi da kyau.

• Generator na Shunt na Self-Excitation:

• An kofa field winding a cikin parallel da armature, ta yi amfani da magnetism na biyu don excitation.

Shaida na kofin bremi mai tsayi na mota na shunt separately excited ta shafi haka:

Idan maƙina ya yi aiki a motoring mode.

Shaida na kofin ta shafi haka idan an yi bremi a cikin separate excitation.

Shaida na kofin ta shafi haka idan an yi bremi a cikin self-excitation.

Muhimman Bremi Mai Tsayi (Rheostatic Braking)

Hanyar wannan, ana kiran bremi mai tsayi a matsayin rheostatic braking, saboda an kofa R_b a cikin terminal na armature don bremi na tsayi. A lokacin bremi, idan mota ya yi aiki a cikin generator, an tabbata energy na kinetic da ke cikin abubuwa masu maƙina da kuma abubuwan da suka kofa. Wannan energy ta zama energy na electrical, ta zama heat a cikin R_b da kuma resistance na armature circuit R_a.

Shaida na kofin bremi mai tsayi na mota na shunt ta shafi haka:

Idan maƙina ya yi aiki a motoring mode.

Shaida na kofin bremi na shunt motor a cikin self da separate excitation ta shafi haka:

Sauransu na Bremi Mai Tsayi na Mota na Series

Don bremi mai tsayi na mota na series, a farko an kawo mota daga tashar. An kofa variable braking resistor Rb (kamar yadda aka nuna) a cikin series da armature, kuma an buga connections na field winding.

Kuma,

Self-Excitation na Mota na Series a Bremi Mai Tsayi

An buga connections na field don hana current na field winding ya ci a hukumar (misali, daga S1 zuwa S2), don back EMF ya haɗe flux na biyu. Maƙina ya yi aiki a cikin self-excited series generator.

Self-excitation ya ba bremi mai tsayi, saboda haka, don bremi mai tsayi, an yi aiki a cikin self-excitation mode tare da series field resistance don haɓaka current da kyau.

Bremi mai tsayi (rheostatic) bai da faɗa ba: duk energy da aka faru ta zama heat a cikin resistors.