I really need help, wrong with my LC circuit, I am using Pspice?

 

Does the transformer (or inductor) has any inductance? If there is 0 inductance, then it will see it as a short to ground, hence 0 V.

 

i really need for help , this LC circuit whats wrong with it , iam using pspice ?? thanks

whats wrong is you need a resistor on the left side

 

Hello,

Did you define the properties of the magnet core TX3?
What is the frequency you are using?

Bertus

 

whats wrong is you need a resistor on the left side

Not necessarily, capacitor has reactance (depending on the frequency of the source voltage) Inductor (or transformer in this case) would also have inductance..
Xc = 1/(2*pi*f*C)
Xl = 2*pi*f*L

Edit:
There are some basic tutorials on this website that will help you understand reactance and inductance
https://www.allaboutcircuits.com/te...rrent/chpt-4/ac-resistor-circuits-capacitive/
https://www.allaboutcircuits.com/textbook/alternating-current/chpt-3/ac-resistor-circuits-inductive/

 

Not necessarily, capacitor has reactance (depending on the frequency of the source voltage) Inductor (or transformer in this case) would also have inductance..
Xc = 1/(2*pi*f*C)
Xl = 2*pi*f*L

Yes but that cap charges too fast! Why add the capacitor anyhow ?

 

Yes but that cap charges too fast! Why add the capacitor anyhow ?

..maybe part of homework assignment to calculate the values on simulator?

 

Hello,

Why add the capacitor anyhow ?

With a capacitor you will be able to create a resonant circuit.

Bertus

 

Hello,



With a capacitor you will be able to create a resonant circuit.

Bertus

yes but without a resistor ? whats the purpose of the cap ?

 

cap is 200 p (assuming 200 picofarads).
1/(2*pi*f*C)
60 Hz = 13.262 M ohms
100 Hz = 7.95 M ohms
400 Hz = 1.989 M Ohms
1 Khz = 795 k ohms
10 Khz = 75.5 K ohms

 

cap is 200 p (assuming 200 picofarads).
1/(2*pi*f*C)
60 Hz = 13.262 M ohms
100 Hz = 7.95 M ohms
400 Hz = 1.989 M Ohms
1 Khz = 795 k ohms
10 Khz = 75.5 K ohms

But the cap charges instantaneously without a resistor, that is zero time, at least in simulation. isnt that a problem ? if I try adding a capacitor without a resistor to my simulator it fucks it up, and it breaks the simulator man

 

But the cap charges instantaneously without a resistor, that is zero time, at least in simulation. isnt that a problem ?

You're thinking RC contstant, that does not apply in this situation.

 

You're thinking RC contstant, that does not apply in this situation.

why not..........are you playing tricks on me?

 

 

The resistance in the TS's circuit if provided by the transformer load R3, which is reflected through the transformer to the primary as determined by the square of the turns ratio.

 

why not..........are you playing tricks on me?

RC constant applies in DC source, not AC.

Capacitor blocks DC, but allows AC
Inductor allows DC, but blocks AC
the above statement about AC applies at certain frequencies, different frequencies will have different effect on caps and inductors.

 

Yes but that cap charges too fast! Why add the capacitor anyhow ?

Your radios have capacitors that small without resistors on the primary of a transformer.