Which bridge is used to measure inductance harmonics?
Which bridge is used to measure inductance harmonics?
Hay’s bridge is used for the measurement of inductance of high ‘Q’ coils.
| Type of Bridge | Name of Bridge | Important |
|---|---|---|
| AC Bridges | Schering bridge | Used to measure relative permittivity |
| Wein’s bridge | Harmonic distortion analyzer, used as a notch filter, used in audio and high-frequency applications |
Why use Maxwell bridge instead of AC bridge to measure unknown inductance?
Advantages of Maxwell’s Bridge The advantages of a Maxwell Bridge are: The frequency does not appear in the final expression of both equations, hence it is independent of frequency. Maxwell’s inductor capacitance bridge is very useful for the wide range of measurement of inductor at audio frequencies.
Why is Maxwell’s bridge not suitable to measure the inductance which having Q 1 and Q 10?
The bridge is limited to measurement of low Q coils, (1 < Q < 10). It is clear that the measurement of high Q coils demands a large value for resistance R4, perhaps 10⁵ or 10⁶. The resistance boxes of such high values are very expensive. Thus for values of Q > 10, Maxwell’s bridge is unsuitable.
When do you use a Maxwell inductance bridge?
Maxwell inductance bridge is an AC bridge used for measurement of inductance of a coil by comparison with a variable standard self-inductance. Maxwell inductance bridge is shown in figure 1 under balance condition. Under balance condition, the current (I d) through the detector is zero.
What is the purpose of the Maxwell’s bridge?
Maxwell’s bridge is also known as Maxwell’s Wein bridge or modified form of Wheatstone bridge or Maxwell’s inductance capacitance bridge, consists of four arms used to measure unknown inductances in terms of calibrated capacitances and resistances. It can be used to measure unknown inductance value and compares it with the standard value.
What kind of capacitor is used in Maxwell bridge?
Since Maxwell Inductance Capacitance Bridge uses variable standard capacitor, it is very expensive to get variable standard capacitor. Maxwell Bridge is suitable for the measurement of inductance with medium vale of Q (1<10).
What kind of bridge is the unknown inductance?
The unknown inductance then becomes known in terms of this capacitance. There are two types of Maxwell bridges: Maxwell’s inductor bridge, and Maxwell’s inductor capacitance bridge. In Maxwell’s inductor bridge, only inductors and resistors are used.