Measurement of resistance and inductance of a choke coil using 3 voltmeter method theory
Answers
Answer:
Voltmeter Method of Measuring Choke Coil Parameters:- The choke coil parameters are - the inductance, resistance(inherent). Even the quality factor and power absorbed by the given choke coil is measured. Choke coil is represented by a pure inductance (L) in series with equivalent resistance (r). This equivalent resistance takes into effect the iron losses in the core of the choke coil and the inherent resistance of the choke coil. Circuit diagram of 3-voltmeter, equivalent circuit of choke coil.
Explanation:
The choke coil parameters we are going to measure in this 3-voltmeter method are – the inductance, resistance as all choke coils have inherent resistance in addition to their inductance. We also measure the quality factor and power absorbed by the given choke coil.
A given choke coil is usually represented by a pure inductance (L) in series with equivalent resistance (r). This equivalent resistance takes into effect the iron losses in the core of the choke coil and the inherent resistance of the choke coil. 3-Voltmeter method and 3-Ammeter method are two of the best ways to measure these two parameters. Thus the equivalent resistance accounts for the copper loses in the choke coil and the iron loses in the iron core.