Induction Disc Type Relay (Shaded Pole Structure)

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I am Md Irfan Ahmed. Welcome to our TH-cam Channel Basic electrical.
About this video:-
It consists of an aluminium disc which is free to rotate in an air gap of an electromagnet.The part of pole face of each pole is shaded with the help of copper band or ring.This is called shading ring.The total flux φ produced due to the alternating current split into two fluxes displaced in time and space due to the shading ring.
Due to the alternating flux, e.m.f gets induced in the shading ring.This e.m.f drives the currents causing the flux to exist in shaded portion.This flux lags behind the flux in the unshaded portion by angle ∝.
Let φs = Flux in shaded portion
φu = Flux in unshaded portion
Es = E.M.F. induced in the disc due to φs
Eu = E.M.F. induced in the disc due to φu
Is = Induced current due to Es
Iu = Induced current due to Eu
Eu lags behind φu by 90° while Es lags behind φs by 90°.The current Is lags Es by small angle β while Iu lags Eu by small angle β.This angle is generally neglected and Is and Iu are assumed to be in phase with Es and Eu respectively, in practice.The phasor diagram is shown in the figure below.
As proved in the previous section, neglecting It we get,
T ∝ φs φu sin ∝ (where T = Torque )
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[@vasavaparimal7137]

nice explanation sir

[@surendrakverma555]

Very good lecture. Thanks

[@BasicElectricals]

Thank you😊

[@ssb9892]

to disc rotate hone s ckt ko kaise isolate kr rha h relay y to batao

[@rohitsaini42926]

Tx 😊

[@pulkitkhanna3447]

Well explained bro 🔥

[@BasicElectricals]

Thank you

[@sewarammasram2214]

सर जी नमस्कार टाइमर से कैसे कनेक्शन करें कि हर 10मिनट में हमारा पंप चले वो भी सिर्फ 2मिनट चले और बंद हो जाय फिर 10मिनट बाद चालू हो और 2मिनट तक चले ये प़क़िया कंटीन्यू चलना चाहिए इसके बारे में वीडियो बनाइए सर जी । इसमें एक डिस्क टाईप रिले होता है जो घूमता रहता है ।

[@BasicElectricals]

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