Pîçey Maxwell Inductance Capacitance: Wêne & Serokanên Danışina

Maxwell Bridge

Maxwell Inductance Capacitance Bridge (bilindî Maxwell Bridge) yek versiyonê biguherînî ye ji bo Wheatstone bridge ku bi karîne dike li ser pîvanî çendina xweya induktivitîyek da. Maxwell Bridge metoda null deflection (di nav de "bridge method") bikar dike li vir bexwazin inductanci nehatik nayê di çendeyê de. Jeger komponentên standard yên paralel capacitor û resistor bin, ponta Maxwell-Wien bridge derbas dike.

Prinsîpa kerdestan û dibe ku angle phase positif ya impedance inductive bi angle phase negatif ya impedance capacitive dikare compensandin heta her du armên din da ve û çendeya di resonance de ye (yaani, jorî potensiyel tune di detektorda û wanî lêzer hatine). Induktanci nayê heke di taymîn kapasitansi de bese.

Du cûre yî Maxwell bridges ne: Maxwell’s inductor bridge û Maxwell’s inductor capacitance bridge. Ji bo Maxwell’s inductor bridge, tik inductors û resistors bikar an. Ji bo Maxwell’s inductor capacitance bridge, capacitor ek we di çendeyê de zêde kirin.

Ji ber ku her du cûrên Maxwell bridge di AC bridge de be, mîna prinsîpa kerdestan AC bridge werbigire heta Maxwell bridge werbigirin.

AC Bridges

AC Bridge ji serec, detector balance û pedar çar arm û re. Di AC bridges de, hewla çar arm impedance an. AC bridges dike bi galvanometer û batarya DC ji Wheatstone bridge bi AC source û detector digerînin.

Di nav de bikar an ji bo dêtina induktance, capacitance, storage factor, dissipation factor û s.

Niha vebijarka general bikin ji bo AC bridge balance. Wêne ji below AC bridge network:

Lê Z1, Z2, Z3 û Z4 armsên bridge ne.

Niha li ser şertê balance, potential difference di b û d de dibêj bêt. Ji ber vê, câ voltage drop ji a derbêş b û d di magnitude û phase de.

Niha vebijarkên Maxwell Bridges:

1. Maxwell’s inductor bridge

2. Maxwell’s inductor capacitance bridge

Maxwell’s Inductance Bridge

Niha vebijarka Maxwell’s inductance bridge. Wêne ji below circuit diagram ê Maxwell’s inductor bridge.

Di vê bridge de, arms bc û cd resistance pûr an ji ber ku phase balance dike di arms ab û ad de.

Maxwell’s Inductance Capacitance Bridge

Di vê Maxwell Bridge de, inductor nayê bi capacitor standard variable mezake.
Circuit ê vê bridge de niha,

Lê, l1 inductance nayê, C4 capacitor standard.

Advantages of Maxwell’s Bridge

Advantages of Maxwell Bridge:

1. Frequency ne di nav final equations de nayê, ji ber vê independent e.

2. Maxwell’s inductor capacitance bridge ji bo range wide measurement of inductor at audio frequencies very useful e.

Disadvantages of Maxwell’s Bridge

Disadvantages of Maxwell Bridge:

1. Variable standard capacitor zaf e.

2. Bridge limited e ji bo measurement of low quality coils (1 < Q < 10) û unsuitable e ji bo low value of Q (i.e. Q < 1), ji ber vê Maxwell bridge used suitable only for medium Q coils e.

All limitations above overcome by modified bridge known as Hay’s bridge which does not use electrical resistance in parallel with the capacitor.

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