Resistor da Bleeder: Me ke ta ce, kuma Me kana a Amfani da ita?

Mai suna da Bleeder Resistor?

Bleeder resistor shine da wani resistor na iya a gaba da ci gaba da mafi girman kungiyar wasu masu siffar voltage don in taimaka da shirya electric charge da ke cikin capacitors na kungiyar wasu masu siffar voltage idan an rufe zabi. Wannan ana yi saboda dalilai na al'amuran.

Idan mutum ya fito wanda ya kasance da kungiyar wasu masu siffar voltage a lokacin da zabi ta shiga, yana da kyau a kan fuskantar voltage daga capacitor. Saboda haka, yana da kyau a fara shirya capacitor don dalilai na al'amuran. Bleeder resistor na iya a amfani don in taimaka da in kara shiryan voltage daban-daban.

Ma'adinancin Bleeder Resistor a Cikin Kungiyar Wasu

Don in san ma'adinancin bleeder resistor, ana bukatar kungiyar wasu na bi canza filter. Misali, za a zaba full-wave rectifier. Output of the rectifier ba na pure DC signal. Ana iya bayyana shi a matsayin pulsating DC signal kuma wannan supply ba zan iya bayyana zuwa load.

Saboda haka, muna amfani da kungiyar wasu na bi canza filter don in bayyana output of the rectifier zuwa pure DC signal. Kungiyar wasu na bi canza filter na nufin capacitors da inductors. Kungiyar wasu na bi canza a taka na baya na nufin cewa output of the rectifier an bayyana zuwa load via kungiyar wasu na bi canza filter da bleeder resistor.

Kamar yadda aka bayyana a taka na baya, bleeder resistor an sama da parallel capacitor. Capacitor an samu charge a tsakiyar har zuwa lokacin da zabi ta shiga. Idan an rufe zabi, akwai adadin charge mai sauƙi a cikin capacitor.

Idan bleeder resistor ba a sama da kungiyar wasu kuma mutum ya fito terminals, capacitor zan shirya voltage har zuwa mutum. Kuma mutum zan shiga lalace.

Amma idan a sama da standard resistor da parallel capacitor, capacitor zan shirya voltage har zuwa resistor.

Yadda a Zaba Bleeder Resistor

Idan kana zaba resistor na yawan value, zan iya ba shi high-speed bleeding. Amma zan yi abin daɗi aiki. Idan kana zaba resistor na yawan value, zan iya ba shi low power loss amma bleeding speed zai ɓe.

Saboda haka, designer ya kamata a zaba resistor na value mai zurfi da ke da yawan value da ke da low enough to discharge the capacitor in a short time.

Don in kula value na daidai da bleeder resistor, ka duba hanyar kuɗi da ke cikin momentary voltage across capacitor Vt, bleeder resistor (R), da initial value Vu. Total capacitance is C and the momentary period is t. Then you can calculate the value of bleeder resistance from the below equation.

A cikin takardun da aka bayyana, ka duba value na voltage na momentary da ke da low for safety purposes. Amma idan kana bari shi zero, lokaci da ke ciki don in bleeder resistor discharge capacitor zai zama infinite. Saboda haka, designer ya kamata a bari value na safe voltage da lokaci da ke ciki don in discharge a capacitor.

Idan kana zaba value na bleeder resistor don fast discharge, resistance zai zama low. Kuma zai karanta abin daɗi aiki. A cikin takardun da aka bayyana, V0 shine initial voltage, da P shine power consumed by the bleeder resistance.

Saboda haka, designer ya kamata a zaba value na desired power loss da bleeding speed of resistor.

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