Na'urar Daɗi na ƙoƙari da Waving Winding

Makarantar Winding na ƙoƙarin ƙwai

Winding na ƙoƙarin ƙwai shine ƙungiyar da take da multiplex wave da simplex lap winding a cikin hanyoyi. Yana da muhimmanci na biyu na lap windings da wave windings ba tare da mafi kyau.

Lap da wave windings suna da adadin sama da lokutan da suka zama daɗi, kuma suke magancewa wani commutator.

Winding na ƙoƙarin ƙwai yana da adadin lokutan da ke dubu da duplex lap windings saboda anan da simplex lap winding ya bayar da 'P' adadin lokutan da ke dubu, kuma anan da multiplex-wave section ya bayar da 'P' adadin lokutan da ke dubu. Saboda haka, adadin duka lokutan da ke dubu (wanda shi ne adadin sama da duplex lap winding).

Fadada Winding na ƙoƙarin ƙwai

Winding na ƙoƙarin ƙwai yana da adadin lokutan da ke dubu da current da voltage rating masu yawan da lap ko wave winding. Wadannan armatures mai winding na ƙoƙarin ƙwai suna da lafiya don amfani da current da voltage na ƙasƙasƙi.

Wadannan windings suna magancewa series-parallel. Wani element na wave da element na lap na biyu suka magancewa a commutator daɗi ɗaya daɗi ɗaya biyu pole pitches apart a series combination. Wadannan biyu commutator segments suka dubu da 360 electrical degrees apart kuma suka yi zero net voltage. Saboda haka, winding na ƙoƙarin ƙwai na lap-wave yana da lafiya da ta yi equalization da ta gida da ta tsara da yadda ake amfani da equalizer. Saboda haka, akwai DC machines mai yawa da suke amfani da armatures mai winding na ƙoƙarin ƙwai.

Makarantar Winding na Drum

Wata wannan winding shine na da conductors suna fito a slots waɗanda suke fito a surface mai drum-shaped armature da suka magancewa front da back connections a coil ends. An samu winding na drum domin tsara da mafi kyau da ring-type winding.

Fadada Winding na Drum

Kowace winding, wanda ya fito a slots na armature, ya ci gaba core, kuma duk ilimin conductor, ba tare da end connections, suna cut main magnetic flux. Saboda haka, voltage induced a wannan type na armature winding yana da yawan da Gramme-ring winding.

Coils, idan ake fito a slots na armature, za su iya pre-formed da insulate. Saboda haka, cost zai iya rage.

Biyu sides na coil suna fito a biyu poles, wata North Pole da wata South Pole, kuma emf induced a su ne daɗi additiive da bincike da end connection.

Fractional pitch winding zai iya amfani a winding na drum. Fadada fractional pitch winding shine ina rage cost da copper na end connections. Commutation tana da lafiya saboda mutual inductor na kusa da coils.

Fractional pitch winding: Don samun emf na yawa, coil span yana da kyau a zama sama da pole pitch. Amma, idan ake rage coil span zuwa eight-tenths (8/10) na pole pitch, zai iya induce emf mai yawa. Wannan shine fractional-pitch winding.

Saboda several conductors suna fito a slot na ɗaya, adadin slots na armature core zai rage, kuma teeth na armature core zai da lafiya masu yawan mechanical. Lamination da protection na coils tana da lafiya.

Cost na manufacturing zai rage a winding na drum saboda a nan muna da shiga fewer coils.

Makarantar Winding na Gramme Ring

Winding na ring shine type na armature winding wanda wire ya fito a outer da inner surfaces alternately na cylindrical ko ring-shaped core. Winding na Gramme-ring type na armature winding shine old type na armature winding. A wannan winding, armature yana da hollow cylinder ko ring mai iron lamination. Core ya wind da insulated wire spirally about the ring.

Winding na continuous, kuma ya ce closed. Muna magancewa coils bayan brushes a series. Figure yana nuna winding na Gramme-Ring type da equivalent circuit. Ana iya gwargwadon adadin sama da voltage-generating conductors wanda suka fito a biyu sides na armature.

Muna tap wire a regular intervals da kuma magancewa su a commutator segments. Akwai biyu lokutan bayan positive da negative brushes, da suka magancewa a parallel. Coils 1 zuwa 6 suna daɗi wata lokuta, amma coils 7 zuwa 12 suna daɗi wata lokuta na biyu.

Idan armature ya zo a clockwise direction, emf yana induce a conductors. Direction na induced emf da direction na current zai ce inward idan conductors suka fito a N-pole by Fleming’s right-hand rule. Idan conductors suka fito a S-pole, direction na induced emf da direction na current zai ce outward.

According to Fleming’s right-hand rule, hold your right hand with the thumb, forefinger, and middle finger at right angles. The forefinger shows the magnetic field direction, the thumb indicates motion, and the middle finger points to the induced current.

Thus the EMF generated in two paths are in the opposite direction as shown in the above figure. The emf generated on each path is additive from bottom to top on each side. Since there are two parallel paths, the voltage per path is the generated voltage of the machine, and each path provides half of the current output in the external circuit.

Fadada Winding na Gramme Ring

• Operating principle of the armature is simpler because there is no crossing of conductors in the winding.

• Same winding can be employed with 2, 4, 6 or 8 poles theoretically.

• Disadvantages of Gramme Ring Winding

• The part of this winding located on the inner side of the iron ring cut very few lines of flux. Thus they have very little voltage induced in them. For this reason, it is not widely used.

• With the same no. of poles the same velocity of the armature winding the induced emf in Gramme-ring winding is half of the induced emf in the drum type winding.

• As the portion lying inside the inner ring acts only as connectors so, there is a wastage of copper.

• Repairs and maintenance are very costly.

• Insulation of winding is much difficult.

• Strong field excitation needed to produce the require flux because the construction requires a large air gap.