AC Bridges dan APLIKASINYA PERTEMAUAN 10 – 11 AC Bridges dan APLIKASINYA

Maxwell Bridge The Maxwell bridge measures an unknown inductance in terms of a known capacitance. The maxwell bridge is limited to the measurement of medium-Q coils (1<Q<10).

Hay Bridge The Hay circuit is more convenient for measuring high-Q coils Hay bridge for inductance measurements --------------------- Impedance triangles illustrate inductive and capacitive phase angles -------------------------------- for Q>10 :

Schering Bridge The Schering bridge, one of the most important bridges, is used extensively for the measurement of capacitors. Schering bridge for measurement of capacitance -------------------- Dissipation factor :

Unbalance Conditions

Bridge balancing problem : (a) unbalanced condition (b) bridge balance is restored by adding a resistor to arm 1 (maxwell configuration) (c) Alternative method of restoring bridge balance, by adding a capacitor to arm 3

Wien Bridge Applications : Frequency measureent Notch filter Frequency-determining element Frequency measurement with the Wien bridge -----------------------

Wagner Ground Connection The wagner ground connection eliminates the effect of stray capacitances across the detector

Universal Impedance Bridge

Bridge configurations of the universal impedance bridge