Contents
What is the relation of the secondary winding leakage reactance and secondary circuit impedance?
Clarification: The secondary winding leakage reactance is directly proportional to the secondary circuit impedance. In secondary winding the leakage reactance is reduced and in turn the secondary circuit impedance is reduced.
What is the reflective resistance?
[ri′flek·təd ri′zis·təns] (electricity) Resistance value that appears to exist across the primary of a transformer when a resistive load is across the secondary.
What does the area of Conductor in primary and secondary winding depends on?
3. What does the area of conductors in primary and secondary windings depend on? Explanation: The area of the conductors is directly dependent on the current density. The area of the conductors are determined after choosing a suitable current density.
What is the ratio of primary impedance to secondary impedance?
Notice that the ratio of the primary impedance to the secondary impedance is the square of the turns ratio, or 100:1. In other words, a 10:1 turns ratio will give an impedance ratio of 100:1.
What is the reflected impedance of a transformer?
This is called the reflected load. A 10 ohm load reflects back a 1,000 ohm impedance, while a 5 ohm load reflects back a 500 ohm impedance. The reflected impedance is a function of the turns ratio of the transformer.
What is the size of a primary winding?
In the typical current transformer application, the primary winding consists of one to a few turns of wire. The primary wire size is much larger than the secondary wire size. The number of secondary winding turns is a selected multiple of the primary turns.
What is the impedance ratio of a 25 turn transformer?
With our 25:1 turns ratio transformer in figure 2, the impedance ratio is the turns ratio squared or, 25 X 25 = 625:1. So if the transformer is working into an 8 ohm load, the impedance that will be reflected to the primary will be the impedance ratio (625) multiplied by the load impedance (8 ohms), equal 5,000 ohms.