- #1
brainbaby
- 228
- 5
Hi friends,
My question...
At non resonance frequencies the resistance of primary is minimum or maximum?
My analysis...
There are two tuned circuit tuned to same frequency . In primary circuit at low frequency XL is low and large amount of current will flow at the inductor L1, now due to this same current is generated in the secondary circuit because both the circuit are tuned to same resonant frequency. The impedance coupled from the secondary will be of same magnitude but opposite in sign and will cancel the inductive reactance of the primary circuit as discussed per theory. Now since XL is canceled in the primary so no inductive reactance will present which technically means that there will be no driving force which will cause large current to flow in the primary circuit as earlier. This can be thought as an "occurrence of large impedance which cause little current flowing in the inductive branch of primary circuit." So at non resonant frequency the presence of a tuned circuit in the vicinity of other tuned circuit fixed at same resonant frequency will cause high primary impedance to persist which force me to assume that at non resonant frequencies the primary resistance is high..
but according to theory its wrong. The text states that at non resonant frequency the primary resistance is low which causes large current to flow causing occurrence of two humps in the output curve.
Theory
My question...
At non resonance frequencies the resistance of primary is minimum or maximum?
My analysis...
There are two tuned circuit tuned to same frequency . In primary circuit at low frequency XL is low and large amount of current will flow at the inductor L1, now due to this same current is generated in the secondary circuit because both the circuit are tuned to same resonant frequency. The impedance coupled from the secondary will be of same magnitude but opposite in sign and will cancel the inductive reactance of the primary circuit as discussed per theory. Now since XL is canceled in the primary so no inductive reactance will present which technically means that there will be no driving force which will cause large current to flow in the primary circuit as earlier. This can be thought as an "occurrence of large impedance which cause little current flowing in the inductive branch of primary circuit." So at non resonant frequency the presence of a tuned circuit in the vicinity of other tuned circuit fixed at same resonant frequency will cause high primary impedance to persist which force me to assume that at non resonant frequencies the primary resistance is high..
but according to theory its wrong. The text states that at non resonant frequency the primary resistance is low which causes large current to flow causing occurrence of two humps in the output curve.
Theory