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PERTEMAUAN 10 – 11

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.

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PERTEMAUAN 10 – 11

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  1. PERTEMAUAN 10 – 11 AC Bridges dan APLIKASINYA

  2. 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).

  3. 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 :

  4. 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 :

  5. Unbalance Conditions

  6. 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

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

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

  9. Universal Impedance Bridge • Universal impedance bridge

  10. Bridge configurations of the universal impedance bridge

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